Fitech Timing Curve


Fitech wiring. FiTech Ultimate LS Truck 500HP EFI Kit 70006 FiTech Ultimate LS Instructions Complete Self Tuning Induction Systems for LS engines designed for the do-it-yourself Hot Rodder to the professional EFI. A sample of “Base Idle Timing and Distributor Advance Curve” information has been entered for this engine for completeness. The Ul-timate LS system will allow for both EV1, EV6, and truck injectors. FiTech Go EFi 2x4 1200HP Power Adder System 30064 Black Finish Description This Kit is for the guys who have 671 and 871 Roots Superchargers or make up to 1200 HP naturally aspirated on their Dual Quad setup. Ignition timing is easily the single most important tuning adjustment on an internal combustion engine and yet the concept of ignition curves continues to be elusive for many enthusiasts. Valve Train Geometry. In this time, the piston/crank travels about 55°. Plan is to put her in gear, watch the map gauge on the fitech, and adjust my timing until I maximize the map sensor. Boost A/F targets are simple to adjust while timing curves can be retarded according to boost through the touch screen. The original mechanical fuel pump mounted on the timing cover, as well as all of the old fuel hard lines, were removed from the Mustang to clean things up. EEC II arrived the following year, adding. Update , pulled the Fitech 1200 dual quad power adder off and going back to the 1050 dominator , customer service rates zero with me , My thoughts are the system has great potential but it's a crap shoot if you don't get one that works like most made in China stuff you are SOL ,. This FiTech EFI is perfect for an everyday driver, a weekend cruiser, or bracket racer. Rotate the distributor counterclockwise to advance the timing. On the Ignitor ® page, we talked about a dyno test performed on a mild 350 Chev with moderate engine modifications and a Mallory Twin-Point Distributor that recorded a benchmark dyno run of 195hp at the wheels (ATW). Scott Crouse Jan 1, 2003. On the more expensive units you can lock out the dizzy. After retuning my car with the new pulley settup he was ready to prove his point. I can get the numbers if it becomes an question later, but my current issue is with starting. What this was telling me was cumbustion was bad. #ad And under the hood with the engine running we can see all the status LED's on the FAST ECU. FiTech EFI Has made it simple with their Go EFI 2X4 POWER ADDER 1200HP self-tuning System. We are leading providers of fuel systems and Ultra Ram SBC EFI. Engine Protection Feature. I am now using my MSD 6AL to control timing and plan on trying to get the Fitech timing working again or switch over to a MSD 6530 digital 6AL that I already have. These PCM's have the ability to determine a cylinder misfire and will even tell you which cylinder midfired. Electronic Spark Timing (EST)/Electronic Spark Control (ESC) Modern vehicles have a distributor that can respond to ECM control such that spark timing may be adjusted based upon the output of the MAP. I was messing around today and checked my timing curve It seems wayyyy too advanced. Flat Tappet Cam Tech Bulletin. I can get the numbers if it becomes an question later, but my current issue is with starting. #ad And under the hood with the engine running we can see all the status LED's on the FAST ECU. Any thoughts on this. Cleetus McFarland "Bald Eagle" LS1/LS2 Boost Cam. Boost air/fuel targets are simple to adjust while timing curves can be retarded according to boost. If you still have detonation, make sure the TDC mark is accurate, the timing curve (advance rate) is stock, and the antifreeze is not over 180°F; and check to see if the heads have ever been milled or de-carboned. it Fitech wiring. FiTech Ultimate LS Instructions. In the first part of the tuning process, control is defined by a linear fuel curve. This is the best way to tune on h. Proceed carefully and document the timing change by measurement, either by degrees of crank rotation or by millimeters before top dead center. I was told specifically by FiTech's owner, Ken Farrell, that if your timing/distributor/advance curve was working good, then more often than not, you'll have lackluster results in trying to be smarter than your distributor is, and "making" a new curve. This provides air/fuel ratios that are reasonably smooth and respond predictably to changes. Since everyone always wants numbers, I have always been safe in advancing the map 2 degrees everywhere to start with. Shine the timing light at the harmonic balancer timing mark on the driver's side of the engine. Join us for this complimentary BAI webinar to hear Tom Brown, Editor-in-Chief of Tom Brown’s Banking Weekly and founder and CEO of Second Curve Capital, give insights on the four areas where he sees the greatest opportunity for smaller banks: debit card programs, private banking, SMB banks and pick-your-spots banks. So besides lowering the compression, a lot of weird control configurations got put in place to squeak by. Valve Timing Tutorial. At higher speeds, the timing must be advance. I need to adjust the timing curve in my EDIS ignition. With the dual curves you can run you can easily set the timing at 34 to 36. I logged boost vs rpm, and timing vs. It looks like a theoretical timing table with no evidance of customizing the values across the loads and rpm. Output to activate a device through rpm, time or pressure inputs. Boost A/F targets are simple to adjust while timing curves can be retarded according to boost easily through your touch screen controller. You don't want it popping through the intake. Swap the parameters in /home/safeconindiaco/account. C3 Corvette 1968-1974 Big Block Timing Chain/Gear Set. Plan is to put her in gear, watch the map gauge on the fitech, and adjust my timing until I maximize the map sensor. Fitech ultimate ls fault codes SURFboard mAX Mesh Wi-Fi Systems and Routers. Sometimes I have problems just posting on a board, lol. Included are several timing curves that are each tailored for different camshafts, final drive gearing, and vehicle weight. Proceed carefully and document the timing change by measurement, either by degrees of crank rotation or by millimeters before top dead center. Your results may vary depending upon compression ratio and the sophistication of the ignition system. What this was telling me was cumbustion was bad. You can tell there is a vacuum leak if the timing reading fluctuates during reading/setting, should be steady. Edelbrock Crate Engines are 100% brand new and utilize our proven Power Package formulas to offer breathtaking performance right out of the box. Hardware, sensor, internals, and other blended technology over years of gen3 to gen4 engines. I have decided to not use the function. Boost air/fuel targets are simple to adjust while timing curves can be retarded according to boost. After retuning my car with the new pulley settup he was ready to prove his point. C3 Corvette 1968-1974 Big Block Timing Chain/Gear Set. My vehicle emissions sticker is missing so I don't know the initial timing, and what the centrifigual advance timing would be and the vacuum advance setting. The value you enter depends on your model and setup. It’s a fine art of calibration to get this perfect, requiring a super-fast reading of a lambda sensor. So besides lowering the compression, a lot of weird control configurations got put in place to squeak by. Total timing refers to the reading at 4500 rpm with the vac. For more detailed specifications regarding your specific application or for "strip only" use, please consult a professional engine builder. Anton's curve from the EFI fundamentals course suggests a timing advance needs to get low rpm timing largely in by the torque max which starts at 1500 rpm and drops at 2400 rpm with BSFC minimum at 1900 rpm. So lets say you set your timing @ 35*, pull 20* for start and idle. View frequently asked questions by category to find topics relevant to your products. Lock the Timing via the Handheld Controller. I would have opted for port injection but my budget just doesn't allow this. From sea level to 7,200 feet over the Sierra Mountains. Not with our RSR ECU because it does not control ignition timing. Rotate the distributor so they could have a distributor manufacturing facility for their EFI and other setups. FiTech's Ul-timate LS kit comes with a knock sensor control and is custom cam friendly. Dyno Results: Camshaft Part # 12-246-3: Designation: XE274H-10: Duration @ 0. At higher speeds, the timing must be advance. Whatever the initial timing is, I might make a note of it just so I can set it back there easily, but it doesn't really matter a whole bunch. Hot rods and street rods have always been the core of the West Coast Nationals, which makes it a perfect home for the America’s Most Beautiful Street Rod. No problems. Both controllers have timing curve mapping using MSD's Pro-Data+ software and programmable 2-step rev limiter, vacuum advance curve, and step retard. Here are the upper timing tables various standard Australian LS1s I have outlined the area that is most important at WOT in stock cars. FiTech Ultimate LS Instructions. Enjoy! Ken. The FiTech is the same as the Sniper. This system makes tuning your Supercharged engine easy! Bolt on 2 of these tough looking throttle bodies and drive your car as the system dials itself into the perfect calibration for all of your driving and. FiTech Go EFi 2x4 1200HP Power Adder System 30064 Black Finish Description This Kit is for the guys who have 671 and 871 Roots Superchargers or make up to 1200 HP naturally aspirated on their Dual Quad setup. MSD says you can pull up to 25 degrees with your progammable box. VX HSV 255 Timing Table Below is a VY Series II HSV 285 upper timing table. The reason why I used it because it was the only TBI available at the time. C3 Corvette 1968-1974 Big Block Timing Chain/Gear Set. Intake air temperature and fuel octane have significant effects on detonation. But I’m reading some folks owning those old vehicles now, they are reverting to the pre-emissions mid-1960’s configuration. You don't want it popping through the intake. #ad And under the hood with the engine running we can see all the status LED's on the FAST ECU. Boost air/fuel targets are simple to adjust while timing curves can be retarded according to boost. , then choose stage 3. 5 degrees and the advance to 6. Hi Jeff, I know this is an old article, but I’ve been playing around with using vacuum advance along with ECU timing control. Then set the run curve like you described. BluePrint Engines is your premium choice in aftermarket and high-performance crate engines. Whether it be the square body, the longer wheelbase, or any of the exciting trim packages available, Chevy owners had plenty of reasons to be excited about. a comparable normally aspirated engine, and, to further retard timing in a way that is proportional to boost (not necessarily linearly). w/Aero 340 LPH pump, TCP Power R&P; Full front coil over conversion w/1" Shelby drop; TMI Sport R custom interior; T5z TKO, Speed Hut custom speedo; Autometer Phantom gauges; SSBC Force 10 -13" disc brakes w/10. 1 Sniper Stealth 4500 (550-841 Shiny, 550-842 Black, & 550-843 Gold) Holley Sniper EFI FUEL INJECTION INSTALLATION MANUAL. You want it retarded so it still runs okay. In addition to the innovative, square design, the Third Generation C10 featured a host of natural curves and lines, spanning from the hood to the beltline, and eventually, the rear tailgate. The timing curve is whatever their base tune was. I was just trying to see a dyno curve that really optimized low rpm timing for a Ford or Chevy large bore, low compression towing application. US NAVY VET - 65 Custom Fastback GT-A-code. This is to make sure that your advance curve occurs as we entered it into our ignition table. FiTech 500HP LS1/LS2/LS6 92mm Ultimate EFI Kit w/ Transmission Control 70002. FiTech Fuel Injection has been supplying automotive products, specifically fuel injection products, since 2012. Fully adjustable and constructed of steel, the 3’ long x 1-1/4” wide face is Perfect for replicating body panels, as a template for plasma cutting or even use on wood projects. With the dual curves you can run you can easily set the timing at 34 to 36. The only reason that this is done is that it is much easier to put timing marks up through 38 degrees on the damper AND they will be visible when. Plan is to put her in gear, watch the map gauge on the fitech, and adjust my timing until I maximize the map sensor. top of the line. 7L Vortec timing cover has additional clearance near the crankshaft seal and allows for the other 24x crank reluctor that can be used with double-row timing sets. I have the timing advancing at a lower rpm than the idle set point on the FiTech. Looking for how to increase horsepower in your car or truck? Our team of experts put together the 7 smartest strategies for unleashing the power under your hood. Texas Speed & Performance is your one-stop shop for all LS and Gen 5 LT1 & LT4 performance parts and engines! We are among the largest LS and Gen 5 LT1/LT4-specific shops in the country, and we machine and assemble all of our engines, camshafts, and Precision Race Components cylinder heads in house!. FiTech EFI w/Tanks Inc. You want it retarded so it still runs okay. Total timing refers to the reading at 4500 rpm with the vac. Because of this, I was able to keep the 2 step limiter on the MSD box functional. The HP and Torque curve look very similar with the main difference being the Test8 curve with the smaller TBI starts to fall off a bit earlier than the larger Holley did, causing that 2. In this time, the piston/crank travels about 55°. With the dual curves you can run you can easily set the timing at 34 to 36. The FiTech is the same as the Sniper. Fitech wiring. Later, we add some timing in the idle and drivability areas to improve the burn of the mixture, improve fuel economy, lower exhaust temperatures, etc. E-Stopp Gatling. The 355 with the brodix heads and the cam and the port matched intake manifold came out right. This is how the system receives RPM signal. FiTech Go Fuel Fuel-Pressure Regulators. Read the number on the timing plate adjacent to the timing mark on the balancer. I have read on different forums and this one included that the aftermarket distributors are not that great so I am trying to source a original ford distributor. Then set the run curve like you described. A larger decay value causes the accel “pump” amount to be ended sooner, and a smaller decay value allows the fuel to extend a little longer. Some products will have likely been sold below ticketed advertised price in some stores prior to the discount offer. this is a see what it does pull. A larger decay value causes the accel “pump” amount to be ended sooner, and a smaller decay value allows the fuel to extend a little longer. A curve can be created from the MAP Advance Curve graph on the upper right of the screen. I've done timing control on two Fitech units, I highly recommend doing it. Hot rods and street rods have always been the core of the West Coast Nationals, which makes it a perfect home for the America’s Most Beautiful Street Rod. Here are the specs: 408W roller block 9. Once back ON, go to ADVANCED SETUP, select IGNITION TIMING, and then select LOCK TIMING. FiTech Fuel Injection has been supplying automotive products, specifically fuel injection products, since 2012. FiTech's Ultimate LS kit comes with a knock sensor control and is custom cam friendly. A letter of complaint was drawn up smartly, and taken around to the garage, where there was a calm 5 minute discussion. Boost A/F targets are simple to adjust while timing curves can be retarded according to boost easily through your touch screen controller. When finished, the timing as viewed on the laptop, should match what you see with the timing light, at all RPM. Also total timing of 38* may be high for some engines especially if you are going lean at any point with your carb setup. Home of "IgnitionMan" small-body HEI, MSD Trigger Only, and EFI-HEI Conversions 24 Buffalo Lane, Yerington, Nevada, 89447 Phone: (775) 722-3294 Distributor conversion orders, ignition system questions, email: info. FiTech makes feeding your Vette with fuel injection easy and affordable. 050": 230° / 236° Max Lift w/ 1. This is more than just increasing the main jets (in a carburetor) by 30%. Texas Speed & Performance is your one-stop shop for all LS and Gen 5 LT1 & LT4 performance parts and engines! We are among the largest LS and Gen 5 LT1/LT4-specific shops in the country, and we machine and assemble all of our engines, camshafts, and Precision Race Components cylinder heads in house!. Carburetor tuning requires the vehicle to be dropped off. I left the stocker on the car and I returned the. GM Gen IV VVT Cam Core Tech Bulletin. I was messing around today and checked my timing curve It seems wayyyy too advanced. Car is in drive with helper foot on brake and idle is set to factory test procedure (about 600 rpm for a 1970), and then set idle to factory spec. 600hp @6200 rpm: $10,150. Compatible with power adder technologies – Wet flow NOx, superchargers, and turbochargers. FiTech EFI Has made it simple with their Go EFI 2X4 POWER ADDER 1200HP self-tuning System. These LED's help with. We reach almost all horsepower endeavors. Don't you love the way you can set timing curves with the programmable ignition. achieve the correct timing curve. "In reality, they would probably be better off using a header with smaller primary tubes with a broader torque curve". My Build: 6. Fitech 400 hp running rich. Now technology has changed. DAVE's small-body HEI's. Just wondering how the FiTech manages the fuel with such a small fuel table (3x3 or 4x4 I believe). Once the hardware is in place and ready setting up the timing curve / ignition map is easy. This info was taken from Crane Cams and is valid information for fellows who know nothing at all about choosing a cam, and that includes most of the fellows who come on this forum asking questions. FiTech Fuel Injection reserves the right to refuse or cancel any such orders whether or not the order has been confirmed and your credit card charged. • FiTech Fuel injection is designed to be used with street based injection systems: MSD digital 6AL or street fire, Sum-mit street amplifier box, etc. 6whp at peak. We are leading providers of fuel systems and Ultra Ram SBC EFI. US NAVY VET - 65 Custom Fastback GT-A-code. a comparable normally aspirated engine, and, to further retard timing in a way that is proportional to boost (not necessarily linearly). Then dajust timing at 3000 rpm or where max advance is in rpm range. In changing this, we have, by virtue of the method by which we express the LCA and the resultant advance/retard of the cam, changed the LCA to 110. FiTech 500HP LS1/LS2/LS6 92mm Ultimate EFI Kit w/ Transmission Control 70002. (pat)>> yeah short on timing. Nothing wrong with them, but the beauty of EFI, at least for me, is the adjustability especially when engines are modded (say change the ignition timing curve). I currently have a new in the box Mallory vacuum comp 9000 8658001 distributor and a mallory 685 box. Minimize flow restrictions between the fuel tank and the carburetors. This return line is located downstream of all the injectors. This info was taken from Crane Cams and is valid information for fellows who know nothing at all about choosing a cam, and that includes most of the fellows who come on this forum asking questions. Later, we add some timing in the idle and drivability areas to improve the burn of the mixture, improve fuel economy, lower exhaust temperatures, etc. If measured at discrete increments of rpm, the timing figures generated by the weights and springs as they move during engine acceleration define a curve when the valves are plotted on a graph. Ignition Timing and The Advance Curve Before checking the air/fuel mixture, the ignition timing and advance curve must first be correct. Swap the parameters in /home/safeconindiaco/account. Flow must be increased throughout the whole system and fuel curve. Step By Step. So lets say you set your timing @ 35*, pull 20* for start and idle. I'm not real familiar with Edelbrock's systems as I try to avoid systems that require chips to be programmed for them. Don't get me wrong, the factory (read: old) HEI distributor in my bone-stock 350ci engine still functioned "well," but it was beginning to show. The 6LS controller is programmable by means of simple plug-in modules, an optional hand-held programmer, a laptop computer; giving the user a variety of ways to adjust RPM and timing. Set For Timing. This Kit is for the guys who have 671 and 871 Roots Superchargers or make up to 1200 HP naturally aspirated on their Dual Quad setup. So under the same conditions as above, the timing needs to be increased to: 55°-17° = 38° BTDC! Timing advance is low at low engine speeds, because the piston is moving slowly, and the fuel has time to burn near TDC. 7L and the 7. The FiTech wideband O2 & Annular Swirl Wet Flow technology give the most complete atomization available, bringing more power than ever. FiTech's Ultimate LS kit comes with a knock sensor control and is custom cam friendly. I left the stocker on the car and I returned the. EFILive is an electronic tool for tuning your diesel truck for better MPG, better torque and horse power curves for towing, and improved drivability. Complete Self Tuning Induction Systems for LS engines designed for the do-it-yourself Hot Rodder to the professional EFI tuner! This system is ready to go with everything needed to complete the induction system of your LS engine. I run 44* TOTAL timing (in by 2800 or so), 33* INITIAL, with a custom made 11* mechanical advance limiting bushing. Because of this, the timing map can be made to be more aggressive than when tuning with gasoline. Both controllers have timing curve mapping using MSD's Pro-Data+ software and programmable 2-step rev limiter, vacuum advance curve, and step retard. This system makes tuning your Supercharged engine easy! Bolt on 2 of these tough looking throttle bodies and drive your car as the system dials itself into the perfect calibration for all of your driving and. With EFI, it is possible to use a more aggressive timing curve than you might be able to with a carburetor. FiTech 500HP LS1/LS2/LS6 92mm Ultimate EFI Kit w/ Transmission Control 70002. Here are the specs: 408W roller block 9. (pat)>> we aren't gonna change the timing right now because we noticed on the initial run the carb was a little on the lean side. Hi Jeff, I know this is an old article, but I’ve been playing around with using vacuum advance along with ECU timing control. These LED's help with. FITECH 30003 GO STREET EFI CAST FINISH 3. Boost A/F targets are simple to adjust while timing curves can be retarded according to boost easily through your touch screen controller. The Ultimate LS system will allow for both EV, EV6, and truck injectors with interchangeable injector harnesses. US NAVY VET - 65 Custom Fastback GT-A-code. FiTech EFI Has made it simple with their Go EFI 2X4 POWER ADDER 1200HP self-tuning System. It will provide lower idle RPM, cleaner start up and crisp throttle response that the best carb tuners in the world can’t match. Whether you have a totally stock, factory equipped truck looking for a bit of extra “get up and go” or MPG, EFI Live is the best, most cost effective way to meet your goals. Enjoy! Ken. Pertronix Electronic Ignition Systems and Coils. The following specifications are general guidelines offered to aide in building an engine for street use. FiTech Go EFI self-learning fuel injection is out-of-the-box compatible with your 300-625 horsepower dual quad or tunnel ram motor. The timing curve is whatever their base tune was. 7L and the 7. I've done timing control on two Fitech units, I highly recommend doing it. #ad And under the hood with the engine running we can see all the status LED's on the FAST ECU. Fully adjustable and constructed of steel, the 3’ long x 1-1/4” wide face is Perfect for replicating body panels, as a template for plasma cutting or even use on wood projects. If you still have detonation, make sure the TDC mark is accurate, the timing curve (advance rate) is stock, and the antifreeze is not over 180°F; and check to see if the heads have ever been milled or de-carboned. By locking the distributor in place, different timing curves can be selected via the handheld touch screen, or this function can be toggled off and ignition controlled separately through traditional methods. We reach almost all horsepower endeavors. The problem going too much in one direction mechanically then trying to adjust it electronically would be the arcing issue where you could ignite the wrong cylinder or you are just too far away. FiTech Fuel Injection reserves the right to refuse or cancel any such orders whether or not the order has been confirmed and your credit card charged. For 96 a combination crankshaft position sensor and cam shaft position sensor perform the timing functions on all the 4. Cleetus McFarland "Bald Eagle" Cathedral Stroker Twin Turbo Cam. what is tricky about choosing a junkyard motor is they blended years and items, hardware and technology over year make and model. So lets say you set your timing @ 35*, pull 20* for start and idle. The beauty of this is that you can theoretically use that table to nail down an absolutely amazing timing curve that could never be achieved with weights and vacuum. Included are several timing curves that are each tailored for different camshafts, final drive gearing, and vehicle weight. With the additional purchase of a twEECer system they are now fully tunable. He picked up a random used stock distributor off the floor in his shop and installed it with the same timing as before. Go EFI-4 is not compatible with nitrous applications. Uploaded files: You need to login to have access to uploads. New option B: FiTech Go EFI 8, PowerAdder ($1500). The reason I chose the FiTech system apart from price is that a lot of parts that make up this unit are OEM so getting replacement bits will not be an issue. It will provide lower idle RPM, cleaner start up and crisp throttle response that the best carb tuners in the world can’t match. I am using an HEI style distributor locked out, you have to lock out the timing otherwise the inputs for the fitech will stack on top of the HEI timing curve. Faster processing means no more flat spots in the power curve or settling for “close enough. For more detailed specifications regarding your specific application or for "strip only" use, please consult a professional engine builder. What this was telling me was cumbustion was bad. Uploaded files: You need to login to have access to uploads. By the ’50s mechanical fuel injection was widely used on all forms of American […]. There is no doubt that given more learning time, the FiTech would outperform the carb and provide a flatter torque curve ( divability ). A curve can be created from the MAP Advance Curve graph on the upper right of the screen. Dyno Results: Camshaft Part # 12-246-3: Designation: XE274H-10: Duration @ 0. Our folks have several options from basic to completely trick. GMC Motorhomes International was founded in 1982 by Ralph Luby >> GMC Motorhomes International 1402 So Cage Blvd, Unit 273 Pharr, TX 78577 | 612. I am running the FiTech and a Procharger on mine. This FiTech EFI is perfect for an everyday driver, a weekend cruiser, or bracket racer. Sign up is fast and easy. Then let the timing map be adjusted to mimic an OEM curve, or perhaps a little quicker. No regulator, pump controller, gauge or ignition box. so start tuning away boys. For 96 a combination crankshaft position sensor and cam shaft position sensor perform the timing functions on all the 4. #ad And under the hood with the engine running we can see all the status LED's on the FAST ECU. The original EEC I debuted in 1978 to control ignition timing, exhaust gas recirculation, and secondary air injection by way of the Thermactor Air pump. Big Block Chevy Tuning - tips, timing, idle RPM Discussion in ' The Hokey Ass Message Board ' started by BOSTONCAMARO , Oct 9, 2012. Comes ready to install with the Muscle Car oil pan, Complete Fuel Injected Unit ECM and Harness. I run 44* TOTAL timing (in by 2800 or so), 33* INITIAL, with a custom made 11* mechanical advance limiting bushing. - sa gear billet timing set with torrington bearing and rolon chain 9 keyway. Step By Step. This system makes tuning your Supercharged engine easy! Bolt on 2 of these tough looking throttle bodies and drive your car as the system dials itself into the perfect calibration for all of your driving and. Valve Train Geometry. Hot rods and street rods have always been the core of the West Coast Nationals, which makes it a perfect home for the America’s Most Beautiful Street Rod. It also presumes you have some way of evaluating your changes which is even more doubful. We chose the above timing settings (to start, at least), based on the original ignition curve of the Chevelle. The Ultimate LS system will allow for both EV, EV6, and truck injectors with interchangeable injector harnesses. I set the timing to 22 degrees with the timing light at idle (if you are following, this is 14 degrees retarded from all-in point in the software). 5" rear disc brakes; 24" Griffin Radiator w/twin 11" 2800 CFM fans; Classic Auto Air AC; Truck-Lite 7" LED headlights. That's a good place to start getting timing dialed in. The reason why I used it because it was the only TBI available at the time. 03-31-2010, 08:07 PM. The decay adjustments shape that curve. I am just running a DS-II. Not with our RSR ECU because it does not control ignition timing. Works out of the box on your 2X4 Blower Plate as an inline setup or can be side mounted using custom linkages. It can also be set with the Hand Held Monitor. You can see that Boost is consistent through 3 runs. I run 44* TOTAL timing (in by 2800 or so), 33* INITIAL, with a custom made 11* mechanical advance limiting bushing. Just because you have run a big-block Chevy before does not mean all big-block Chevys like 32 degrees of timing. Better control of your ignition's timing is another benefit of EFI. GMC Motorhomes International was founded in 1982 by Ralph Luby >> GMC Motorhomes International 1402 So Cage Blvd, Unit 273 Pharr, TX 78577 | 612. FiTech EFI Has made it simple with their Go EFI 2X4 POWER ADDER 1200HP self-tuning System. 6whp peak drop. Using a laptop computer for adjustments may be intimidating to some, whereas simply plugging in an MSD module or using the handheld controller may be a bit easier. I can get the numbers if it becomes an question later, but my current issue is with starting. Buy Curve Blades online - Supercheap Auto. No mater how what ignition system you use, if the ignition spark timing is not correct for the engine needs, the engine will not produce all the potential power built into it. the correct curve on a distributor machine. This, however, is not perfect or optimum for any one combination. president’s corner. Our folks have several options from basic to completely trick. All that’s changed is the point at which the exhaust opens. Setting Ignition Timing Curves Tick-Tock Timing The Right Way. Advance the ignition timing. Ignition Timing. These Mounting Brackets include an extrusion on the frame side which is designed to dowel into a hole in the frame. The reason I chose the FiTech system apart from price is that a lot of parts that make up this unit are OEM so getting replacement bits will not be an issue. Some of the B diesels are manufactured byDaihatsu and can be identified by the letter "D" on the timing cover. Included are several timing curves that are each tailored for different camshafts, final drive gearing, and vehicle weight. Dyno Results: Camshaft Part # 12-246-3: Designation: XE274H-10: Duration @ 0. @6000 rpm, peaking at 152 ft-lb. MSD designed LS controllers with matching factory connectors for a direct installation, and few connections are needed: cam, crank, and MAP sensors and coils. Hopefully this will help those who have the FItech get the IAC and some timing settings set right, again all engines are different so what mine likes for tim. Just because you have run a big-block Chevy before does not mean all big-block Chevys like 32 degrees of timing. Limited timing/fuel control. I programmed the 6AL2 knowing that the timing curve is actually retarded, not advanced. This system makes tuning your Supercharged engine easy! Bolt on 2 of these tough looking throttle bodies and drive your car as the system dials itself into the perfect calibration for all of your driving and. • Modify the table according to your combination (in this case we set all cells to 31 degrees, which is exactly how timing was set up before we began the EFI conversion. I set the timing to 22 degrees with the timing light at idle (if you are following, this is 14 degrees retarded from all-in point in the software). I am installing the FiTech TBI and going to use the timing control feature. Believe the timing light above all else, it's always the real timing (if there's a discrepancy). Limited timing/fuel control. I programmed the 6AL2 knowing that the timing curve is actually retarded, not advanced. He is an HPTuners member on this site. Better control of your ignition's timing is another benefit of EFI. These PCM's have the ability to determine a cylinder misfire and will even tell you which cylinder midfired. The OE 12A front disc brakes are pretty good on the '80+ cars. The Gen 4 LY6 differed from the previous Gen 3 LQ4 and LQ9 versions by way of the use of LS3-style, rectangular-port (823) heads and matching intake. After retuning my car with the new pulley settup he was ready to prove his point. Forget the crummy wedge style brakes on the '79 cars. Our complete LQ9 408CI 575HP stroker crate engine package dyno tested ready for installation. This is my first post here. Second, the ignition timing curve can be tailored precisely to each individual cylinder, so the engine can, and this is important, run more compression because it is the first cylinder to detonate that limits the use of a single, mean, best-torque timing. I can get the numbers if it becomes an question later, but my current issue is with starting. No problems. Swap the parameters in /home/safeconindiaco/account. 0 degrees you set this setting to 12. $54 FiTech Go EFI 2x4 625HP Dual Quad. The timing, the people, and the location are all key elements to this event, but there’s a bit of Goodguys magic that gives it an extra boost of feeling that’s difficult to define. The fact I can eliminate several components offsets all costs and I could tune infinitely for timing and AFR , which is a big deal in turbo applications over a carb. This is because of the ability to control the air/fuel ratio at varying load and RPM. Just wondering how the FiTech manages the fuel with such a small fuel table (3x3 or 4x4 I believe). com PN: 54001. 1 Sniper Stealth 4500 (550-841 Shiny, 550-842 Black, & 550-843 Gold) Holley Sniper EFI FUEL INJECTION INSTALLATION MANUAL. EFILive is an electronic tool for tuning your diesel truck for better MPG, better torque and horse power curves for towing, and improved drivability. I was just trying to see a dyno curve that really optimized low rpm timing for a Ford or Chevy large bore, low compression towing application. 229/244 cam. The FiTech is the same as the Sniper. FiTech Fuel Injection has been supplying automotive products, specifically fuel injection products, since 2012. So under the same conditions as above, the timing needs to be increased to: 55°-17° = 38° BTDC! Timing advance is low at low engine speeds, because the piston is moving slowly, and the fuel has time to burn near TDC. With the curve built into the arm, you get maximum turning radius. Not with our RSR ECU because it does not control ignition timing. that uses existing factory coil packs and sub harnesses. On the more expensive units you can lock out the dizzy. Proceed carefully and document the timing change by measurement, either by degrees of crank rotation or by millimeters before top dead center. About Eastwood 37 in Curve Template. The 1996–1997 LT1 timing cover has limited clearance near the crankshaft seal, so one reluctor design allows for the LT1 timing cover and the GM single-row timing set. so start tuning away boys. "Every combo likes a different amount of timing. With EFI, you are able to use a more aggressive timing curve than you may be able to with a carburetor, because of the ability to control the air/fuel ratio at varying load and RPM. Automatic magnetic pickup compensation for crank triggers or distributor pick- ups. For example, 100 kW wheel power, can be obtained in 2 nd gear, 4 th gear and 5 th gear. I don't have any current tables on-line. The 1996–2002 5. It’s a fine art of calibration to get this perfect, requiring a super-fast reading of a lambda sensor. Included are several timing curves that are each tailored for different camshafts, final drive gearing, and vehicle weight. Before checking the air/fuel mixture, the ignition timing and advance curve must first be correct. Unlimited Vehicles ECU reprogramming Latest Version MMCFlash Software to reprogram ecu. , fire the spark plug later in the compression stroke, closer to TDC) for a boosted engine vs. 600hp @6200 rpm: $10,150. The 6LS controller is programmable by means of simple plug-in modules, an optional hand-held programmer, a laptop computer; giving the user a variety of ways to adjust RPM and timing. I left the stocker on the car and I returned the. VX SS Timing Table Below is a VX HSV 255kw upper timing table. The only reason that this is done is that it is much easier to put timing marks up through 38 degrees on the damper AND they will be visible when. For better idle quality & overall. FiTech Go EFi 2x4 1200HP Power Adder System 30064 Black Finish Description This Kit is for the guys who have 671 and 871 Roots Superchargers or make up to 1200 HP naturally aspirated on their Dual Quad setup. With the dual curves you can run you can easily set the timing at 34 to 36. This can cost power, as the pressure is starting to build as the piston is still moving up. So I'm curious if I should run timing control or not. You want it retarded so it still runs okay. long tubes. Anyway, that dead-band from idle timing to the beginning of the mechanical timing curve is critical to the engine's response and initial power. The coilovers and the composite spring and the ride height on the wheels and tires selected. As usual with projects things cause delays. I am running the FiTech and a Procharger on mine. Don't "change the plugs" like some people suggest, it’s a waste of time and money. Setting the timing on a 95° day will result in too mild of a curve, just as setting it on a 50° fall day will be too aggressive for summer driving. Also, a return fuel line from the fuel pressure regulator. 5 degrees and the advance to 6. This system makes tuning your Supercharged engine easy! Bolt on 2 of these tough looking throttle bodies and drive your car as the system dials itself into the perfect calibration for all of your driving and. , then choose stage 3. Flow must be increased throughout the whole system and fuel curve. - sa gear billet timing set with torrington bearing and rolon chain 9 keyway. Choosing a particular type of camshaft for an engine build is an important decision that has to be made before any other parts are ordered or machined. Boost A/F targets are simple to adjust while timing curves can be retarded according to boost easily through your touch screen controller. EFILive is an electronic tool for tuning your diesel truck for better MPG, better torque and horse power curves for towing, and improved drivability. Cleetus McFarland "Bald Eagle" Cathedral Stroker Twin Turbo Cam. This system makes tuning your Supercharged engine easy! Bolt on 2 of these tough looking throttle bodies and drive your car as the system dials itself into the perfect calibration for all of your driving and. Cleetus McFarland "Bald Eagle" LS1/LS2 Boost Cam. 00: 615 torque @ 4500 rpm. Anton's curve from the EFI fundamentals course suggests a timing advance needs to get low rpm timing largely in by the torque max which starts at 1500 rpm and drops at 2400 rpm with BSFC minimum at 1900 rpm. , then choose stage 3. FiTech Fuel Injection reserves the right to refuse or cancel any such orders whether or not the order has been confirmed and your credit card charged. The 1996–1997 LT1 timing cover has limited clearance near the crankshaft seal, so one reluctor design allows for the LT1 timing cover and the GM single-row timing set. , fire the spark plug later in the compression stroke, closer to TDC) for a boosted engine vs. The problem going too much in one direction mechanically then trying to adjust it electronically would be the arcing issue where you could ignite the wrong cylinder or you are just too far away. My understanding is that it is beneficial/common practice to retard ignition timing (i. On this Toyota, three coil packs live on the #1, #3 and #5 cylinders, and each power a plug there and on the opposite side. There is a cam sync output for fuel controllers or data acquisition. Our folks have several options from basic to completely trick. Don’t get me wrong, the factory (read: old) HEI distributor in my bone-stock 350ci engine still functioned “well,” but it was beginning to show. The typical mechanical timing curve generally starts 200-500 rpm higher than idle, mostly to provide a stable idle. FiTech's Ultimate LS kit comes with a knock sensor control and is custom cam friendly. All of the fitech. This return line is located downstream of all the injectors. In changing this, we have, by virtue of the method by which we express the LCA and the resultant advance/retard of the cam, changed the LCA to 110. ----1999 F150 XLT Lariat Super Cab 4X4 5. Valve Train Geometry. FiTech Go EFi 2x4 1200HP Power Adder System 30064 Black Finish Description This Kit is for the guys who have 671 and 871 Roots Superchargers or make up to 1200 HP naturally aspirated on their Dual Quad setup. Fitech backfire on deceleration. These LED's help with. Sign up is fast and easy. This FiTech EFI is perfect for an everyday driver, a weekend cruiser, or bracket racer. w/Aero 340 LPH pump, TCP Power R&P; Full front coil over conversion w/1" Shelby drop; TMI Sport R custom interior; T5z TKO, Speed Hut custom speedo; Autometer Phantom gauges; SSBC Force 10 -13" disc brakes w/10. 6 out of 5 stars 25. 038: Ignition timing: 9 to 11 degrees: Idle. I would have opted for port injection but my budget just doesn't allow this. I gave it a little gas while. In fact, the first of the mechanical variety appeared on French aircraft in the early 1900s, but most of us are more familiar with the early systems pioneered for race cars by Ed Winfield and Stu Hilborn. 0 degrees you set this setting to 12. Since everyone always wants numbers, I have always been safe in advancing the map 2 degrees everywhere to start with. The ignition timing set by the factory requires the use of a high-quality lead free regular gasoline with an octane specification of (R+M/2). Flow must be increased throughout the whole system and fuel curve. To find out more including how to change your settings, please see our. I think that what is confusing you here is how the total mechanical advance is read by using a timing tape and timing marks on the damper instead of the timing marks on the timing tab on the engine. Advance the ignition timing. About 500 miles round trip. This calculator is based on modeling your engine's wide-open-throttle VE with a quadratic equation of the form VE = A*rpm 2 + B*rpm + C where: A, B, & C are constants. Cleetus McFarland "Bald Eagle" LS1/LS2 Boost Cam. Quality OEM product right there. [email protected] FiTech's Ul-timate LS kit comes with a knock sensor control and is custom cam friendly. Hyper Spark Distributors are the perfect distributor for use with EFI systems when controlling timing from the EFI controller. Otherwise go to best vacuum at idle then back 1-2"/hg. The Right Curve, stop dinkin' with what I write. Step By Step. With the spark throwers and spark carriers cleared of responsibility for code P0304, we moved along to the spark makers. Valve Train Geometry. Better control of your ignition's timing is another benefit of EFI. ^DISCLAIMER: Discounts apply to most recent previous ticketed advertised price. US NAVY VET - 65 Custom Fastback GT-A-code. I am no completely sold into the idea of running EFI. Unlimited Vehicles ECU reprogramming Latest Version MMCFlash Software to reprogram ecu. Hi Jeff, I know this is an old article, but I've been playing around with using vacuum advance along with ECU timing control. Believe the timing light above all else, it's always the real timing (if there's a discrepancy). The chart allows you to map out an advance curve based on manifold vacuum (much like the vacuum advance on a mechanical distributor). The reason Vortec heads require less timing advance is because of their greater efficiency. It looks like a theoretical timing table with no evidance of customizing the values across the loads and rpm. Minimize flow restrictions between the fuel tank and the carburetors. Anton's curve from the EFI fundamentals course suggests a timing advance needs to get low rpm timing largely in by the torque max which starts at 1500 rpm and drops at 2400 rpm with BSFC minimum at 1900 rpm. 050" on the intake lobe will generally dictate where the power curve will occur. Step By Step. Boost air/fuel targets are simple to adjust while timing curves can be retarded according to boost. @6000 rpm, peaking at 152 ft-lb. On the smaller FiTech you can not do timing control. The days of fumbling through jets and metering rods for your project are over. They feature a highly accurate Hall Effect crank trigger sensor for a noise free RPM signal to the EFI. IDLE TUNING Foreword by Rinkrat456: This article is literally copied and pasted from Krambo's Silverado SS page. Don't get me wrong, the factory (read: old) HEI distributor in my bone-stock 350ci engine still functioned "well," but it was beginning to show. Set For Timing. Changes are quick and easy with any aspect of ecu operation including: timing characteristics or advance, air/fuel curves, rev limits, even cold start operation. 5% change in a Holley type main jet. FiTech's Ultimate LS kit comes with a knock sensor control and is custom cam friendly. We also recommend getting our Extended Radius Arm Mounting Brackets for a hassle-free installation. I programmed the 6AL2 knowing that the timing curve is actually retarded, not advanced. Some Magnetti Marelli bikes responded by having a -60 put in this column while most Delphi bikes respond by inputting a +25. Fuel injection has been around for a long time. Following all manufacturer's directions, carefully install a timing light on the cylinder #1 spark plug wire. C3 Corvettes 1968-1982 350 MSD Digital E-Curve Distributor. Timing control provided by ECU. I don't set mine that far out because the controller in my FiTech can both advance and retard timing. I am running the FiTech and a Procharger on mine. New option B: FiTech Go EFI 8, PowerAdder ($1500). I was messing around today and checked my timing curve It seems wayyyy too advanced. You can see in the timing graph how the Learned Knock has affected the timing curve. The Go Fuel Fuel-Pressure Regulator is able to handle high-flow fuel pumps and is adjustable from 30–70 psi. (34* for Mopars and 35* for Fords). So under the same conditions as above, the timing needs to be increased to: 55°-17° = 38° BTDC! Timing advance is low at low engine speeds, because the piston is moving slowly, and the fuel has time to burn near TDC. My Build: 6. It looks like a theoretical timing table with no evidance of customizing the values across the loads and rpm. FiTech EFI Has made it simple with their Go EFI 2X4 POWER ADDER 1200HP self-tuning System. This presumes you know more than the factory, which is doubtful. I've revised the curve on my computer, just haven't had a chance to upload to the ignition yet. On the smaller FiTech you can not do timing control. 038: Ignition timing: 9 to 11 degrees: Idle. Boost A/F targets are simple to adjust while timing curves can be retarded according to boost easily through your touch screen controller. I am no completely sold into the idea of running EFI. This is because of the ability to control the air/fuel ratio at varying load and RPM. The rate at which the springs let the advance weights move determines the timing curve. Total timing refers to the reading at 4500 rpm with the vac. Then mark 28*. Also total timing of 38* may be high for some engines especially if you are going lean at any point with your carb setup. The chart allows you to map out an advance curve based on manifold vacuum (much like the vacuum advance on a mechanical distributor). Uploaded files: You need to login to have access to uploads. I programmed the 6AL2 knowing that the timing curve is actually retarded, not advanced. There is a little bit of a learning curve to get started as their manual leaves something to be desired, but I could help provide some tips that I have gleaned from many other forums. FiTech Fuel Injection has been supplying automotive products, specifically fuel injection products, since 2012. The Ultimate LS system will allow for both EV, EV6, and truck injectors with interchangeable injector harnesses. Changes are quick and easy with any aspect of ecu operation including: timing characteristics or advance, air/fuel curves, rev limits, even cold start operation. VX HSV 255 Timing Table Below is a VY Series II HSV 285 upper timing table. With EFI, you are able to use a more aggressive timing curve than you may be able to with a carburetor, because of the ability to control the air/fuel ratio at varying load and RPM. I was told specifically by FiTech's owner, Ken Farrell, that if your timing/distributor/advance curve was working good, then more often than not, you'll have lackluster results in trying to be smarter than your distributor is, and "making" a new curve. No regulator, pump controller, gauge or ignition box. Sometimes I have problems just posting on a board, lol. Write and store multiple tunes that can be switched even while running. Pertronix Electronic Ignition Systems and Coils. safeconindia. EEC II arrived the following year, adding. Hopefully this will help those who have the FItech get the IAC and some timing settings set right, again all engines are different so what mine likes for tim. I take ABSOLUTELY ZERO CREDIT for the length of material you're about to read, however I have made a few comments in-text that you can see which I will highlight in green. Our nitrous cam will then have the valve timing at 31-59-77-23. 5" rear disc brakes; 24" Griffin Radiator w/twin 11" 2800 CFM fans; Classic Auto Air AC; Truck-Lite 7" LED headlights. I'm setting the spark map in my FiTech system to replicate a mechanical advance curve and letting the vacuum advance do what it always has, account for the load changes. These are a couple curves my my low and hi-speed EBL tables from way back in 2009. it Fitech wiring. With EFI, it is possible to use a more aggressive timing curve than you might be able to with a carburetor. 0 carb, I have the service manuals for my mustang but they do not tell the timing specs for my car. EEC II arrived the following year, adding. I'm hoping to finally get my car running later this summer. For more detailed specifications regarding your specific application or for "strip only" use, please consult a professional engine builder. FiTech's kits offer timing control, but it is not required. "IMO if you want that much timing at idle, lock the distributor out and set your Total Timing as your Base Timing and forget about itHell you want all your timing in by 3000rpm anyways, so if you have a 4000rpm stall what good is having a timing curve in the first place" I'm going to have to agree with TC. (mike)>> nice flat curve, no bad spots in it. FiTech's Ultimate LS kit comes with a knock sensor control and is custom cam friendly. FiTech's Ul-timate LS kit comes with a knock sensor control and is custom cam friendly. My Build: 6. The HP and Torque curve look very similar with the main difference being the Test8 curve with the smaller TBI starts to fall off a bit earlier than the larger Holley did, causing that 2. Hopefully this will help those who have the FItech get the IAC and some timing settings set right, again all engines are different so what mine likes for tim. I run 44* TOTAL timing (in by 2800 or so), 33* INITIAL, with a custom made 11* mechanical advance limiting bushing. Messing with the ignition timing really won't help either, because it is still a lean fuel/air mix on deceleration that is the cause. There is no doubt that given more learning time, the FiTech would outperform the carb and provide a flatter torque curve ( divability ). Once the ignition timing is fully synchronized, the Timing Table can be tuned for each application. Designed for 4150 and 4500 style flanges (When using 4500 style flange, P/N 300-4145-1AL adapter is required). All of the fitech. Choosing a cam requires answering some basic questions, the most important of which is the engine application itself. The original EEC I debuted in 1978 to control ignition timing, exhaust gas recirculation, and secondary air injection by way of the Thermactor Air pump. Boost A/F targets are simple to adjust while timing curves can be retarded according to boost through the touch screen. Spoke to FiTech tech last Friday and got the IAC set right. One of the great things about E85 is not only its higher octane rating, but also its ability to suppress detonation. That's a good place to start getting timing dialed in. It will provide lower idle RPM, cleaner start up and crisp throttle response that the best carb tuners in the world can’t match. This info was taken from Crane Cams and is valid information for fellows who know nothing at all about choosing a cam, and that includes most of the fellows who come on this forum asking questions. This engine makes an incredibly flat torque curve, 128 ft-lbs. In those days the Ford designers were trying every trick in the book to get their engine to pass the fed emissions specs. I have the timing advancing at a lower rpm than the idle set point on the FiTech. FiTech Go Fuel Fuel-Pressure Regulators. I would have opted for port injection but my budget just doesn't allow this. By simply swapping out the black 18* MSD bushing (or other MSD stock bushings provided) and inserting one of our custom machined bushings it will allow you to set you idle timing at 22* (14* Bushing) or 26* (10* bushing) and not allow the timing to exceed the desired 36*. I just drove from San Francisco to Reno, NV and back. Ignition Timing. The Gen 4 LY6 differed from the previous Gen 3 LQ4 and LQ9 versions by way of the use of LS3-style, rectangular-port (823) heads and matching intake. This is the best way to tune on h. Also keep track of air inlet temps on the FiTech dashboard. There is no doubt that given more learning time, the FiTech would outperform the carb and provide a flatter torque curve ( divability ). Start out with your total timing the same as on gas then adjust for best mph. 5 degrees and the advance to 6. On the more expensive units you can lock out the dizzy. Our folks have several options from basic to completely trick. IDLE TUNING Foreword by Rinkrat456: This article is literally copied and pasted from Krambo's Silverado SS page. The only real 100-percent way to find the correct timing is to use a chassis or engine dyno,” suggests Macy. The OE 12A front disc brakes are pretty good on the '80+ cars. Of course, that often requires the services of an expert tuner with a dyno, but it is generally well worth the cost and effort. , then choose stage 3. To find out more including how to change your settings, please see our. Spoke to FiTech tech last Friday and got the IAC set right. I've revised the curve on my computer, just haven't had a chance to upload to the ignition yet. This FiTech EFI is perfect for an everyday driver, a weekend cruiser, or bracket racer. For 96 a combination crankshaft position sensor and cam shaft position sensor perform the timing functions on all the 4. Flat Tappet Cam Tech Bulletin. Once the ignition timing is fully synchronized, the Timing Table can be tuned for each application. @6000 rpm, peaking at 152 ft-lb. My project is a 1971 Mustang Mach1 351-4V. Following all manufacturer's directions, carefully install a timing light on the cylinder #1 spark plug wire. With EFI, you are able to use a more aggressive timing curve than you may be able to with a carburetor, because of the ability to control the air/fuel ratio at varying load and RPM. #ad FAST really has the software setup right. The Ul-timate LS system will allow for both EV1, EV6, and truck injectors. Fuel pressure regulators uses a diaphragm and spring combination within its housing; with a vacuum source on the top side of the diaphragm. A letter of complaint was drawn up smartly, and taken around to the garage, where there was a calm 5 minute discussion. (pat)>> yeah short on timing. Also, a return fuel line from the fuel pressure regulator. Once back ON, go to ADVANCED SETUP, select IGNITION TIMING, and then select LOCK TIMING. a comparable normally aspirated engine, and, to further retard timing in a way that is proportional to boost (not necessarily linearly). Boost A/F targets are simple to adjust while timing curves can be retarded according to boost easily through your touch screen controller. I am running the FiTech and a Procharger on mine. Buy Curve Blades online - Supercheap Auto. 0 degrees you set this setting to 12. Some of the B diesels are manufactured byDaihatsu and can be identified by the letter "D" on the timing cover. I take ABSOLUTELY ZERO CREDIT for the length of material you're about to read, however I have made a few comments in-text that you can see which I will highlight in green. 038: Ignition timing: 9 to 11 degrees: Idle. Here are the specs: 408W roller block 9. - scat crankshaft, clevite bearings. A fuel pump block-off plate will be. The Gen 4 LY6 differed from the previous Gen 3 LQ4 and LQ9 versions by way of the use of LS3-style, rectangular-port (823) heads and matching intake. If you still have detonation, make sure the TDC mark is accurate, the timing curve (advance rate) is stock, and the antifreeze is not over 180°F; and check to see if the heads have ever been milled or de-carboned. Amazes me to see guys with a laptop plugging in timing curves and fuel delivery.