Ls3 Idle Timing

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. Ls3 e38 - ozshuttle. I swapped a LS3/T56 into my 81 Camaro and finally got it started a few weeks ago. Pushing flow and power even higher. 050" of valve lift, this therefore is overlap at 0. Common causes of intermittent stalling may include a bad idle speed control (ISC) system, low fuel pressure, loss of ignition, vacuum or EGR leaks, or other problems we’ll get to later in this article. VR '10 Camaro- VRSP2 Camshaft Idle- 457RWHP One of our favorite tried-and-true combinations is a Vengeance Racing camshaft, a set of long-tube headers, and a quality cold air induction system. L99 camshaft is different — having a little less duration and a little less lift, both of which give the engine a smoother idle. Many customers who come to us learn that, despite a previous diagnosis, they don't need a new engine, only certain repairs or adjustments. 2L features variable valve timing, maximizing engine performance for given demands and conditions. That allows the spark feedback to add timing when there is increased load on the engine. I later noted the same idle on other stock 396 425hp vettes. – Idle-5800 RPM “Sleeper cam” with smooth idle improving HP and TQ everywhere. not come off idle after the control system installation, check for an illuminated MIL (malfunction indicator light, which is located in the fuse/relay center, sometimes called the ˝Check Engine Light ˛ or ˝Service Engine Soon ˛ light) which indicates stored fault codes. Endyn Fabricated Manifolds. Mast is THE leader in LS cam technology. I would stay away from real low idle. 5) Dirty idle jet or economizer jet. 3 gasket still work? I'm also removing the AFM and VVT and installing a comp cam and ported heads. 025 hot), firing order. The term has changed a bit over the years in this industry, fuel injection has revolutionized the way consumers, auto racers and hot-rodders devour their horsepower. LS3 POWERED AK Cobra Gen III Build Pages. The takeaway from this test is camshaft LSA is a double-edged sword. I could be totally wrong, but that's what it sounds like to me. Crank Relearn Instructions (With and Without an OBD Scanner/Reader) Posted by Alex E. I get the cam and theyre install/tune Im after torque area under the curve thats useable on the street with a lumpy idle. I bought the truck recently and have begun working on it. Clean as necessary. 16 intake valves. Average repair cost is $1,980 at 79,600 miles. From the very beginning, whenever I started the Van cold, it had a loud ticking sound, and the oil pressure would often drop from a normal of 40 down to 20 lbs. You can keep sneaking the idle timing advance forward while monitoring the above parameters to see where you reach a point of diminishing returns. Sweep the spark timing from 15 degrees to -5 degrees with fixed throttle angle, in 2 or 1 degree steps. I had my new long block consisting of a LS2 stock bottom with stock L92 heads, stock LS3 intake, and cam on the dyno today. From the very beginning, whenever I started the Van cold, it had a loud ticking sound, and the oil pressure would often drop from a normal of 40 down to 20 lbs. connected so all i can think of is the timing of the engine and thus the map in the ECU??? the main idle screw on. How do we adjust an engine's idle speed? In the past, adjusting an engine's idle speed was easy. The 2010 Chevrolet Camaro has 19 problems reported for premature timing chain wear. **The factory LS3 camshaft uses a single-bolt cam design, which means one bolt holds the upper timing sprocket on the camshaft. Use CamQuest to select the perfect camshaft and valve train setup by answering a few application-specific questions. Chevy LS3 alloy crate engine converted to an HO version with aftermarket items. In this document, we will go through the basic steps to get your idle control setup using VCM Suite. Horsepower. A street/strip car that runs on pump gas may "ping" with this much. During very hot weather, total timing should be set at degrees. camshaft usually has a power band way up the RPM range (6,000+), and a race motor that sees frequent sustained high RPMs can really make a lot of power with that high VE. 5 lb-ft of torque and a much broader powerband—at the cost of much lower idle vacuum. This cam has a noticeable choppy idle. 5) Adjust the idle stop screw so the engine idle speed obtains 550rpm in drive (auto trans) or 650rpm in neutral (manual trans). The symptoms are very indicative of retarded timing. TFS-30675540 Timing chain damper, LS2/L92/LS3 non-VVT engines, each TFS-30675600 Timing chain damper adapter bracket, each TFS-K30675600 TFS-K306 6756000 Timing chain ch hain damper dampper and. This cover should work right? Sent from AutoGuide. Because of the changing loads and engine speeds associated with any performance engine, not only must the ignition timing be right for optimal performance, the proverbial "right" time varies considerably. The guys from Crane deleted all of the Active Fuel Management and Variable Valve Timing components, and completed the LS3 conversion by installing a stock LS3 cam along with a set of Crane’s performance valve springs to handle the higher lift of the bigger. ferro-spiral core spark plug wire set & Spark Plugs for GM gen 4 LS3/LS4/LS7 engines. You simply right click, add a plot, and drag it to the point on the table you want it to be, and you're well on your way to creating your own completely custom timing curve. But over this past winter, I noticed a significant drop in oil pressure at idle when the engine/oil is hot. Brand new Standalone LS2 / LS3 swap (drive by cable) wiring harness. Friday: 8 a. The DOS based software was easy to navigate and enabled affordable real-time fuel & spark changes via a laptop PC. Removing the timing cover and checking that the timing marks line up is one of the first things to do. Aftermarket roller-cam, GM roller lifters. Your choices for Valve Lift and Duration are limited. The LS3 replaced the LS2 in the Corvette in 2008 and is considered a Gen-4 engine. You simply right click, add a plot, and drag it to the point on the table you want it to be, and you’re well on your way to creating your own completely custom timing curve. Be sure that your carburetor's pilot jet is the correct size and that the idle air mixture screw is correctly adjusted before looking for other causes of popping. I have my air filter right behind the left headlight and my IAT sensor behind the right headlight. MSD 6014 GM Chevy LS LS6 Red Ignition Control Box Timing Rev Limiter LS1 LSX LS3. wikiHow is a “wiki,” similar to Wikipedia, which means that many of our articles are co-written by multiple authors. The OEM cam gears vary in tooth count, bolt pattern, and sensor pickup. Hard Starting. If the timing is just a little late the result is a slight loss of power and a little dip in fuel economy. I have successfully installed the donor LS3/TR6060 into my '68 Camaro and it runs great. GM > Engine > Idle > Idle RPM. All this starts with initial timing. 0L Coyote engine. You can keep sneaking the idle timing advance forward while monitoring the above parameters to see where you reach a point of diminishing returns. The IAC (Idle Air Control) valve uses a small electric motor to vary engine idle rpm to exactly where you set it at in your ECU parameters. This cover should work right? Sent from AutoGuide. ) Idle manifold vacuum 16 in/hg Compression pressure Lowest reading must be 75% of highest reading Initial ignition timing 6 Point gap. The idle speed is usually controlled by the Idle Air Control Motor, which is mounted on or the back side of Throttle Body’s Intake Manifold. Once you remove the Cat Lightoff timing modifiers and fix the EOI, recheck your MAF tune in the idle cells. Timing Chains can snap but its rare and usually from severe situations like a mechanical over rev. 9 diff gears atm timing is about 24 idle 45 at cruise 42 light acceleration 33 heavy acceleration and 29 at wot. LS1 Tuning Explained - Why they gain so much from just a tune. Boost and LS3 stock bottom end I need some educated advice on AFR and timing base lines. LS Ignition Products / LS Coils. Edelbrock is the most respected name in performance! Since 1938, Edelbrock has manufactured its core products in the USA for quality and performance. 025 hot), firing order. It can also retard the valve timing for more top-end power. On a timing set having various keyways for advancing or retarding the cam timing, use the keyway that has the dot or pip mark directly above the keyway, not offset to either side if you want the timing to be straight up (having no advance or retard), like the 1972-back and 1987-newer timing sets. The IAC is a pcm controlled stepper motor location the throttle body, just above the TP sensor. my idle is all i lack to finalizing my tune while i have gotten it to idle around 850 fairly well with the spark adaptive idle on my spark timing jump quickly from 15 to 22 degrees and with a lack of tuning experience I'm not sure if this is normal. Then if the TPS is below 6%, it removes timing from the base value. Replaced plugs, coil pack and wires. 7:1 'switchover' point (where the sensor output voltage suddenly changes from high to low) than a typical oxy sensor. The guys from Crane deleted all of the Active Fuel Management and Variable Valve Timing components, and completed the LS3 conversion by installing a stock LS3 cam along with a set of Crane’s performance valve springs to handle the higher lift of the bigger cams when it came time to test them. Mast is THE leader in LS cam technology. With all of the same great components as the LS3, but with an additional 50 horsepower, the new LS 376/495 is ready, willing, and able to answer your call for a new LS crate engine. Shop great deals on LS swap fittings and pipe adapters from ICT Billet. 1-225-926-6110 [email protected] Will the stock 5. This will assist in smooth transitions between shifts or. Camshaft Phasing: the 6. Hydraulic Unit (assembled with stator/sprocket) Central Valve (Bolt) Return Spring Vortec 6. 68 g/cyl and 3000 rpm above for wide open throttle timing. Tuning E85 Vehicles Steps to properly convert a car to ethanol. Learn about this problem, why it occurs, and how to fix it. Friday: 8 a. This is usually accomplished by loosening the bolts and rotating the injection pump in small increments either clockwise or counterclockwise. L99 has a cam phaser and, to get the additional piston-to-valve clearance required when cam phasing changes, the pistons are different parts having valve reliefs machined into their tops. A timing module will be required for proper operation of the ignition system with this manifold. What is Parameter Timing Advance (TA) in GSM? The Timing Advance is a parameter that allows the GSM BTS to control the signal delays in their communication with the mobile. Explanations of each input are below the calculator. And, it is all done automatically! VVT becomes an issue when swapping a cam: Piston to Valve Clearance can be a problem. Because of the changing loads and engine speeds associated with any performance engine, not only must the ignition timing be right for optimal performance, the proverbial "right" time varies considerably. YourMechanic. 5" Touchscreen Included. All this starts with initial timing. What is the "normal" idle rpm for the 5. With all of the same great components as the LS3, but with an additional 50 horsepower, the new LS 376/480 is ready, willing, and able to answer your call for a new LS crate engine. Our goal here at enginebasics. Be careful when adding timing advance at idle and only add a little at a time. The stock spring loaded timing chain tensioner was discarded and upgraded with the stationary "wedge type". The gas mileage attained in either of these applications will depend heavily on your driving habits as you may already know. • Fits factory timing cover • NOTE: This high volume oil pump is thicker than the production LS1, LS6, LS2 and LS3 oil pump and may not fit in a stock timing cover with aftermarket double roller timing chains that require spacing out the oil pump. Clicking this will make more experts see the question and we will remind you when it gets answered. It is against the law in some states to install, sell, offer for sale or advertise any device, apparatus or mechanism that is intended to alter or modify the original design or. I have my air filter right behind the left headlight and my IAT sensor behind the right headlight. Friday: 8 a. Idle Speed Warm = The idle speed of the engine when it's fully warmed up. 5k rpm and long term is hovering around -12% while short term varies up to -30% but always stays negative until i'm in motion. The Timing Advance parameter is very important in many applications and procedures of the GSM system. 525” max lift on both the intake and exhaust side, and the duration is 219/228 degrees at. We can also make custom changes to calibration parameters such as idle speed and shift interrupt to meet your needs. just use the live controls to figure out a nice steady idle, and note at what spark that was, set the idle spark tables to that value at the proper map/rpm. There are a number of reasons why a crankshaft position sensor can fail, and a number of symptoms associated with that failure. USUAL CAUSE The usual cause of abnormally high idle speeds are vacuum leaks or an inoperative idle speed control motor. Either of these will also depend heavily on the type of intake system you are using to arrive at your 400 hp number. Stock timing? This is a discussion on Stock timing? within the General Help forums, part of the LSx Technical Help Section category; Can some one please tell me what is the factory ignition timing for a 01 WS6?. With the short block complete I next installed the ARP head studs and PFADT Racing solid engine mounts. Steve Morris Engines 231-747-7520. LSX Performance Parts. Torque them to 18lb/ft on the bolts you can get a torque wrench on, and just make the others you can't get the wrench on about as tight as those. We design our lobes IN HOUSE using proprietary software. Ignition timing is a tuning tool for professional Top Fuel drag race engine builders. Late model vehicles with coil-on-plug ignitions are candidates for high voltage coils that will produce long duration, high energy spark even at high RPM, and sophisticated ignition controllers that allow you to adjust ignition timing. LS3 Idle speed Discussion in 'VF Holden Commodore (2013 - 2017)' started by berlina411, Feb 7, 2018. It truly is a "hot cam" that offers up an aggressive lope at idle and a buzz saw power band that never stops. Find many great new & used options and get the best deals for GM Performance LS9 Camshaft - LS1/LS2/LS3 4. Home About Cam Motion Returns and Refunds Contact. Learn about this problem, why it occurs, and how to fix it. advance but just ended up plugging it it since it didn't. Brian Tooley Racing, Inc. 0 CL This camshaft is a great supercharger camshaft for the ZL1 or CTS-V customer looking for an aggressive muscle car sound. And, it’s all done automatically. If the problem were to maintain afterward we would want to check idle valve operation to make sure it has not seized from age, as well as the belt timing to make sure it has not slipped. Ideally you should just have the MS control everything. WARNING While cranking engine, keep clear of propeller, as it may rotate. At idle, for example, the cam is at the full advanced position, allowing. Idle Monitor is a simple application designed to keep track of the computer's idle time. The timing was set to 14 degrees at idle of 850 RPM and 36 degrees total all in at 3500 RPM. programmed setting (see the A/F Target and Timing. It starts a little hard but starts. Hard Starting. I don't know if your Predator will let you adjust idle timing, but HPt will, and if you use the scanner/realtime editor you can run the timing up and down until it sounds the way you like, then go over to the editor and change it to the value you found. Page 34: Troubleshooting / warning. Big-Inch LS Engine Camshaft Guide June 7, 2017 by LS Engine DiY The cylinder heads might be the most important part of an engine in terms of producing horsepower, but unless something opens up the valves, the heads will flow no air at all. Boosted LS timing curve and spark plugs What do most guys set for start up and idle timing etc. Many Google searches tell me that most engines with LS3 heads like timing on the lower end, around 12°-15° at idle and WOT around 27°. i have almost 70deg of overlap in a std stroke ls1 with 10. Our EFI 24x™and EFI 58x™ Product Lines bring Gen III LS1 PCM control and Gen IV LS3 ECM control to these popular engines. It's a little better on. This allows the engine control module to adjust ignition timing with greater precision, which optimizes performance and economy. Abnormal combustion, more commonly known as knock or detonation, has been the limiting factor in internal combustion engine power generation since the discovery of the otto cycle itself. The timing was set to 14 degrees at idle of 850 RPM and 36 degrees total all in at 3500 RPM. We recommend looking for 2010 - 2013. 0 CL This camshaft is a great supercharger camshaft for the ZL1 or CTS-V customer looking for an aggressive muscle car sound. 0L Coyote engine. Want proof? We had variable valve timing cams 18 months BEFORE anyone in the aftermarket. 562 114 LSA. Free Shipping! Chevrolet engineers took a production LS3 6. 1982 911 sc engine idle speed adjustment "03" 996 C2S-LS3 V8-480 HP timing, mixture and idle speed as stated above. And, it does seem that, back 3 1/2 years ago when I first bought the car with just under 50,000 miles on it, it did this same thing. Stock timing? This is a discussion on Stock timing? within the General Help forums, part of the LSx Technical Help Section category; Can some one please tell me what is the factory ignition timing for a 01 WS6?. It also needed more light and moderate load timing than i had previously been trying. • 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. 1-225-926-6110 [email protected] Effect Of Changes In Cam Timing And Lobe Separation Angle The following tables illustrate how variations in lobe separation angle and cam timing will effect the behavior of the engine in which the camshaft is installed. The LS Ignition box was designed to work with the LS based engine from stock to wild. It features a clean, mesh wrapping that dramatically improves engine aesthetics over the factory harness. *Engine timing: The idle speed also comes from engine timing. tl* the contact owns a 2010 chevrolet camaro. As many of you know, several years ago we were one of the first companies to offer radical manifold modifications (with our cut/ported/welded manifolds). 2L vin code " " is an aluminum block engine with VVT (variable valve timing) producing 403HP and 417lb ft of torque. Hello, I'm trying to figure out my fast idle issue. The ideal ignition timing for power and fuel economy is just short of the point where detonation or pinging occurs, the correct ignition timing (the initial timing plus the advance from both mechanical and vacuum advance mechanisms) will cause the pressure created by the fuel being burned in the combustion chamber, that is pushing the piston. Feel free to contact us on 07 3268 7517 for any inquiry. 5" Touchscreen Included. Over the years, fellow tuners have made files to help others setup tables in HP Tuners and they can be difficult to find. LSx Atlanta provides tuning and performance services for your GM high performance vehicles. L99 used in automatic version Camaro SS models. Manufactures have removed these. This info is for those that are considering rebuilds or different heads. A camshaft with a long duration doesn't run well at all at idle or low RPMs. 5 psi of boost. The cam specs are 236/240 590/590. 2013 Corvette Grand Sport A6 Forged LME 416, Greg Good ported TFS 255 LS3 heads, EPS 222/242. 1-225-926-6110 [email protected] I ended up with idle and off-idle AFRs of 13. Hi, new here. The L92 was first produced in 2007, installed in the Cadillac Escalade. The components available for your vehicle will vary according to the type of ignition system. " If the ICL is less than the LSA, it is said to be ground "advanced". Vehicles made since 2000 use ‘drive by wire system’, where the Idle Air System is incorporated straight to Electronic Throttle Body’s assembly. L99 used in automatic version Camaro SS models. This package can still be daily driven. The GM Performance Part engineers coupled that aggressive camshaft and high flowing cylinder head design with our new carbureted intake manifold specific for the L92/LS3 cylinder heads (p/n 12629063). Calculate Camshaft Overlap From Lobe Centers and Duration. L99 used in automatic version Camaro SS models. These features are in addition to the existing programmable step retard, launch retard and RPM rev limiters from its predecessor. I don't know if your Predator will let you adjust idle timing, but HPt will, and if you use the scanner/realtime editor you can run the timing up and down until it sounds the way you like, then go over to the editor and change it to the value you found. Hey guys, I am on the fence with my options on a crate engine. This is the amount of advance at idle with the spark triggered before top dead center (BTDC). This box can be installed on 24x and 58x crank trigger engines, for use on carbureted and fuel injection will not control fuel. For engines that are experiencing detonation problems, the primary options are the use of ignition/timing retard systems, higher octane fuel, or intercooling. For an owner or tuner that has never tuned an E85 vehicle it can be a frustrating experience. This information can be obtained from Specifications, Tune Up Specs for any year you select. What can cause a car to die once it’s put into gear? One of the most common failures that can cause this problem that I have seen before is the Torque converter solenoid (TCC solenoid). It idles around 1000-1100 and I would like it to be more like 700-800. Chevrolet Camaro Stalling or Low Engine Idle Speed Due to Dirty Throttle Body - 13 reports. 519 lift of the 427's and later 396's , but with more duration. Mast is THE leader in LS cam technology. With all the computers, sensors, and gadgets, it may seem like there's some sort of magical witchcraft taking place under the hood. This article has also been viewed 104,118 times. 1967-75 Camaro engine tune-up specifications including timing, dwell angle, and spark plug gap, and firing order. Home About Cam Motion Returns and Refunds Contact. The reason why the LS3 responds so well to wilder cam timing is because it already has sufficient displacement, compression, and head flow. 's parts are designed, intended, advertised and sold exclusively for installation on vehicles in compliance with state and federal law. At 6% throttle, all the timing is back in, making just off of idle very responsive. He is an HPTuners member on this site. no boost retard. Due to its strength, the LS3 block was later used in the LS9 for the ZR1 engine, a very high output supercharged engine. timing at -20* at idle After doing that I decided to look at real time data to see if I could see anything out of the ordinary. And pressure while driving is fine. My LS3 corvette surges at idle - Cars & Trucks question. 7 rocker 115. Check the RPM gauge for the proper idle speed setting (minimum air). Idle speed control by step motor, timing, electronic throttle or solenoid valve; Features and maps developed to improve the engine control on several applications, providing better driveability and comfort. just use the live controls to figure out a nice steady idle, and note at what spark that was, set the idle spark tables to that value at the proper map/rpm. To adjust the timing at idle the base spark tables are the easiest place. Let us understand what it is today, and know its main uses. Free Shipping! Chevrolet engineers took a production LS3 6. not come off idle after the control system installation, check for an illuminated MIL (malfunction indicator light, which is located in the fuse/relay center, sometimes called the ˝Check Engine Light ˛ or ˝Service Engine Soon ˛ light) which indicates stored fault codes. The Hot Cam adds Heat to the LS3. Chevrolet Camaro Stalling or Low Engine Idle Speed Due to Dirty Throttle Body - 13 reports. • 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. Spark timing retarded to far will cause late combustion, losing the opportunity to take advantage of the most efficient part of the power stroke, at the top where the highest pressures occur. Works with stock gear and factory converter. L99 has a cam phaser and, to get the additional piston-to-valve clearance required when cam phasing changes, the pistons are different parts having valve reliefs machined into their tops. Comments | By James Sapienza - October 11, 2019. E38 Gen IV Corvette - EFI Tuning Class 3 E38 Gen IV ECM Class - Curt Miller begin the scan. The IAC (Idle Air Control) valve uses a small electric motor to vary engine idle rpm to exactly where you set it at in your ECU parameters. I have posted them here, on my site, and I will add more as they become available for you to use for free. Timing is everything, so make it perfect with one of our top-brand timing lights! From LED readouts to swiveling heads, our timing lights offer the features you need to dial in ignition timing quickly and accurately. A timing mark is an indicator used for setting the timing of the ignition system of an engine, typically found on the crankshaft pulley (as pictured) or the flywheel, being the largest radius rotating at crankshaft speed and therefore the place where marks at one degree intervals will be farthest apart. GM Performance Parts for the lowest prices on the web. Effect Of Changes In Cam Timing And Lobe Separation Angle The following tables illustrate how variations in lobe separation angle and cam timing will effect the behavior of the engine in which the camshaft is installed. It starts a little hard but starts. Friday: 8 a. 050 lift -. LS3-powered '68 Impala Has the Power to Back Up Its Looks Old-model Chevy proved it is all show and all go at the 16th annual Rides, Rods & Relics in Redondo Beach, California. When you purchase new remanufactured engine from Auto iWeb Engines and Transmissions you get a ton of extras. One can only image what kind of drag racing horsepower potential lines within the confines of this beast. Be careful when adding timing advance at idle and only add a little at a time. I swapped a LS3/T56 into my 81 Camaro and finally got it started a few weeks ago. It can also retard the valve timing for more top-end power. It sounds somewhat like timing chain rattle. What do you think this @magnusonsuperchargers supercharged LS put down? By the way only tuning was changing the WOT air/fuel target prior to the pull. Make sure advancing correctly. A purpose-built, OEM-quality wiring harness is included in the kit as well. And with the included FAST™ EZ-LS™ Ignition Controller, the user can easily get running or has the option to adjust timing. ) • Click Save. L99 camshaft is different — having a little less duration and a little less lift, both of which give the engine a smoother idle. 223/235 duration @. In this document, we will go through the basic steps to get your idle control setup using VCM Suite. 0L Coyote engine. FAST GM LS1 Idle Air Control (IAC) Valve 307059. 0 CL This camshaft is a great supercharger camshaft for the ZL1 or CTS-V customer looking for an aggressive muscle car sound. It came from the factory with a 403 horsepower rating, variable valve timing, and used the same heads, block, and crankshaft as the LS3. Rough Idle. I have a 5. Now we need to test the idle valve range (gives air to the engine when throttle is closed) Open "CAN bus/Testmodes" ---> "Output Test mode - Idle Valve". the manufacturer was notified. This is my first LS motor so I have a few questions: 1) my engine is bogging or hesitating for a few seconds when I come off idle during hot weather. If the timing is just a little late the result is a slight loss of power and a little dip in fuel economy. Some questions I have are: 1) How is the ideal timing of methanol compared to that of high octane leaded gasoline? 2) Could not having enough timing cause the combustion temparatures to reach a level which causes the head gasket to burn through?. Chevy Big Block V8. This is a good example of how basic engine diagnostic tests can work to pinpoint the root cause of the cars problem. Inside the Predator's memory are the actual tuning files that optimize spark timing and air/fuel ratio curves. Possible Causes: Incorrect camshaft timing. Check engine. After all, it's supposed to control the idle speed, and the idle speed is behaving wrong. Idle surging; Idle surging can be caused due to other issues in the car but if it happens in conjunction with other throttle position sensor symptoms, the culprit is TPS. What is a normal idle rpm of the 435hp LS3? Would running it at say 750 cause me a. Home About Cam Motion Returns and Refunds Contact. Common causes of intermittent stalling may include a bad idle speed control (ISC) system, low fuel pressure, loss of ignition, vacuum or EGR leaks, or other problems we’ll get to later in this article. The 525HP LS3 is the perfect crate engine for those desiring a "bumpy" camshaft idle for a drop-in package. Due to its strength, the LS3 block was later used in the LS9 for the ZR1 engine, a very high output supercharged engine. not come off idle after the control system installation, check for an illuminated MIL (malfunction indicator light, which is located in the fuse/relay center, sometimes called the ˝Check Engine Light ˛ or ˝Service Engine Soon ˛ light) which indicates stored fault codes. The 6L80E automatic is a perfect match for this engine and vehicle package with a first gear of 4. So it may just be the R3 cam doing its thing. The following table lists the typical MBT spark for common cylinder head/engine combinations, your engines MBT will vary. While exhaust system popping may be considered normal, it is certainly made worse by an overly lean idle circuit. Gen IV E38/E67 Idle control. He is an HPTuners member on this site. Our goal here at enginebasics. Have got the funds already to go 4. Performance Camshaft Package for VE-VFs with L98, LS2 and LS3 With everything you need to get your VE-VF 6L/6. Boost and LS3 stock bottom end I need some educated advice on AFR and timing base lines. Want proof? We had variable valve timing cams 18 months BEFORE anyone in the aftermarket. (Equation 7) So, by using a reasonable estimated BSFC and a reasonable best-power air to fuel ratio, you can use Equation 7 to estimate the airflow required for a given amount of horsepower, and with Equation 3, you can calculate the airflow of your engine at a given RPM if it was operating at 100% VE. L99 has a cam phaser and, to get the additional piston-to-valve clearance required when cam phasing changes, the pistons are different parts having valve reliefs machined into their tops. If your engine idle is rough, make sure to have a certified mechanic inspect this as soon as possible. The car has 150,000 on it. This only happened when hot. 620 lift with 1. Displacement. LS3 produces 426hp/408lb-ft tq compared to L99’s 400hp/395lb-ft tq, although the L99 features lower compression. Both engines share the same block, cylinder head and intake manifold design elements. I get the cam and theyre install/tune Im after torque area under the curve thats useable on the street with a lumpy idle. First things first…determine what the car is going to be used for mainly. This is a general guide which will list symptoms for 944 starting and running problems and common causes of those problems. Click Here and check out our Pace Performance LS3 525HP Click Here and check out our new primed and prepped LS3 525HP with Pace Installed Holley 302-1 Muscle Car Swap Oil Pan. However, this is likely to be an issue with the ignition timing or fueling instead. The OEM cam gears vary in tooth count, bolt pattern, and sensor pickup. ) after bottom dead center and alter the intake valve opening point to set the idle quality. Buy 383 Stroker Chevy Crate Engines for Sale Available in Long Block and Turnkey. (idle), 15 mph, and 25 mph. 2013 Corvette Grand Sport A6 Forged LME 416, Greg Good ported TFS 255 LS3 heads, EPS 222/242. 622, 112 LSA using HP Tuners. 2010-2015 LS3 Camaro SS/1LE Cam Packages Package Includes: Your Choice of Camshaft - VMS1. If problems idleing, after you do all these idles steps, Go back to Idle Airflow Vs ECT, add 1 point to WHOLE ROW, whether idle in gear, or idle in p/n, and add 1 point at a time to WHOLE ROW, re-upload tune to car, and repeat until car idles. Once connected to the vehicle, the Predators internal computer recognizes the vehicles PCM and automatically picks the proper tuning files designed specifically for that PCM.