Ls Big Cam Idle Timing

Speedmaster has become a leader in its field, built on a long term consistency of being a specialist in aftermarket automotive components. The LS1 Stage 1 camshaft was designed for enthusiast who want to increase power while maintaining excellent drivability and manners. LIMITED WARRANTY Bullet Racing Cams, LLC and Ultradyne warrants that all of its products are free from defects in materials and workmanship. 7:1 idle, with a smoother idle, reduced temperatures while sitting in traffic, and less exhaust smell. Upgrading to Gen III LS-Series PCM: Sensors and Inputs Guide includes instructional photos, checklists, and step-by-step instructions on upgrading to the GM Gen III LS-Series PCM, ECM, Electronics, and POWERTRAIN CONTROL SYSTEMS. I have also installed a adjustible vac. Gear Drives are a great alternative to traditional timing chains. Camshaft timing LS1/LS2 Engine Tech. Here are some tips! IntroductionOk, we have enough Sniper systems out there that I thought it would be a good idea to create a posting on challenges that might arise during installation. Summit Racing Pro LS cams are designed with the specific timing events required by each application. To troubleshoot the fuel injector system in your LS1 swap, you should always check your MIL status first for any stored check engine lights. Be careful of adding to much timing - it can give a great no load idle, but with any kind of load will become erratic. 4 pushrods, btr 675 springs, ls2 dog bone, 3/1 bolt kit, and a melling high volumke oil pump. Thank you kindly!. 7) Mild Performance LS2 Cams (6. The Causes of Internal Engine Knock, and How to Eliminate it. We sat down with Crane Cams and discussed all of these issues and how they relate to the LS series, and got an inside look at a cam comparison they ran on three of their most popular grinds for the LS3. **551 cams are not recommended with compression ratio of 10:1 or higher. Changing the cam timing alone plays a huge roll. engine is not. Engines with hot cams that are fitted with sequential injection management systems can run leaner idle mixtures than systems using bank or group fire. 3 Truck Cams; 6. Level 4 camshafts are designed for heavily modified engines. Every part of the Holley Sniper EFI Systen installation is a breeze but a few folks are challenged to get the idle rpm set correctly. TRW forged pistons, Erson camshaft. improvement), you need to increase the overlap. ” One segment that truly benefits from a wider LSA is the marine marine market. Timing Sets; Gear Drives Voodoo Nitrous/SuperCharger Hydraulic Roller Cam - GM V8 LS GEN III/IV 302/314 Hydraulic Roller Cam. note: the above cams can be used in the 351w & 302 high output engines by rewiring the distributor to firing order 1-5-4-2-6-3-7-8. Camshafts and lifters help determine how powerful your engine can be. If you want high performance from a bigger cam, you will need to delete the VVT system. My engine is a modified Chevy 350 with ported double hump heads, roller lifters and lots of more performance stuff. 9 diff gears atm timing is about 24 idle 45 at cruise 42 light acceleration 33 heavy acceleration and 29 at wot. We sat down with Crane Cams and discussed all of these issues and how they relate to the LS series, and got an inside look at a cam comparison they ran on three of their most popular grinds for the LS3. HP tuners Cam Tuning. Changing the high/low octane tables for timing. Presented by Dan Maslic. This is also why stock GM LS camshafts use an LSA between 116 and 122 degrees – to smooth the idle and help the O2 sensor. 6/1 on the big block with a EFi style roller cam). Camshaft Lift. These are extremely versatile camshafts with a big cam idle, but a reasonable RPM range (3,750rpm and up) for a higher RPM race build. Camshaft Type. of initial timing to get it to idle and when you rev it you mechanical advance kicks in and you end up with 45 degrees all in. there are no signs of knock retard and carnt hear any knock but i have no knock ears every time i add timing it. I was wondering what kind of timing curves some of you LS engine guys are running. This is for an engine with stock camshaft, heads, stroke, and a compression ratio of 10:1. LS 440ci LS7 HYD Roller 800HP Our high output hydraulic cam package. going for a cam with big lift will pay off but go to big and you will need pistons with valve relief the cam i run in my ls1 is. 0) LS3 Mild Performance Cams (6. I own a 2013 Chevy Cruze LS with 101,300 miles on it. There is a tradeoff, however. MISFIRE and TROUBLESHOOTING the ENGINE - CF-106. Camshaft Duration (@. 527in Intake /. 8 Truck Cams; 5. GM#12588670. I received a change timing belt warning. The GM Ecotec engine, also known by its codename L850, is a family of all-aluminium inline-four engines, displacing between 1. BIG Cams This happens mostly from the older more experienced car people. (Hot Idle at 600 rpm. GM High-Tech Performance Tech on Properly installing and degreeing an ls1 cam and timing set. Holley products for GM's popular LS engine are dominating the LS scene as well. 7L 3 bolt cam CS8LS1-SR CS8LS1 0 LS2 6. World's top manufacturer of performance camshafts, lifters, valve springs, rocker arms and related valve train parts for all race and street performance engines. Note: When advancing/retarding the cam, be sure to check valve to piston clearance. 595/595”lift lsa 114 •texas speed spring kit, pac polished double springs, titanium retainers, valve seals/spring seats. LS1 Tuning Explained - Why they gain so much from just a tune. having to make big corrections because the main fueling is out then this results in the cars engine. any cam with lopey sound will probably be wrong for FI most likely too big. The new cam improved the peak output by 20 HP, but gains were even greater higher in the rev range. Vacuum will be low (9"-11") Recurved distributor, HP ignition, dual exhaust or headers, 4bbl low rise type manifold. What is the timing at idle? I wouldnt put to much back in, im at 12 at 900 rpm with mine with a 247/[email protected] A 114 will smooth the idle out as well. The other big issue - and in America it's all about being big - is that street camshafts are often chosen as much for their lumpy idle quality as for their power potential. i also have flat top pistons and big chamber 1. At this point you can sit happy where you're at or you can determine whether or not the idle speed can come down. If it keeps trying to die, give it 5% throttle just to keep it idling and slowly back the throttle off until it knows how to stay alive on its own. A stock cam will work fine at 14. I want a Radical Sounding Cam, What Should I Run? Well, this is a big issue and a LOT needs to be considered. If you had the cash you ran Carrillo rods. With tuning software you can even retard timing just during cranking for a big cam allowing easier starting. AMS Racing Stage I Wickedstik Camshaft GM GEN III LS1 LS6 LQ4 LQ9 5. Only at www. I tried lowering the top end timing to 26° and lost a substantial amount of power. This muddies the waters and can compromise performance. It is just that the intakes on the ls1 flow better than the exhaust so a bit more duration helps to get the intake/exhaust flow ratio closer to optimum. Disconnect power from the ECM for at least 10 seconds to clear codes (in case any are present) and reconnect the IAC electrical connector. looking for big help with tuning an extremely large cam in my ls1 If this is your first visit, be sure to check out the FAQ by clicking the link above. Find Summit Racing® Pro LS Turbo Camshafts SUM-8706 and get Free Shipping on Orders Over $99 at Summit Racing! The Summit Racing Pro LS Turbo cams are affordable and specifically designed to optimize cam timing with turbochargers. 6) Turn the ignition off. We have all noticed the different sounds of performance cams, with the distinct lopes or rough idle. I changed the camshaft actuator solenoid and the Camshaft Position Sensor. The engine should idle at about 600 rpm. Please talk to our technical department regarding custom camshaft grinds. The stock cam is 204/211 with 117 lsa. ON NO ACCOUNT use these settings before the maximum advance on the distributor has been correctly limited. 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. For medium cams, try within the range of 18-22 degrees of advance. I was wondering what kind of timing curves some of you LS engine guys are running. Computer tuning, valve spring and pushrod upgrades required. My Chevy Dealer stated it would be $850 to fix including replacing the timing belt, tensioners, pulley, water pump and labor. Re: extra spark advance timing with bigger cam! ? 11-11-05 05:21 PM - Post# 814315 In response to mr wabbit It sounds like your distributor was installed incorrectly. [Read LS Tech: How to Delete Variable Valve Timing (VVT) on an LS Engine for more info and part numbers. Max timing used to be about 22 now it's around 30. LS1 - This sets the dwell time of the LS1/6 coils. it has no knock at any other rpm. The GM Ecotec engine, also known by its codename L850, is a family of all-aluminium inline-four engines, displacing between 1. The engine should idle at about 600 rpm. The GenI and GenII Chevy small blocks came with comparatively small journal camshafts. Ideally, you'll want the timing to be set to slightly below the timing that would give it the most power - on most piston engines, this typically works out to somewhere in the 10 to 18 degree range. Presented by Dan Maslic. Camshaft Kits, Install Kits and Accessories ; Cam Motion Shelf Cams; Centrifugal Supercharged Camshaft; Comp Shelf Cams; Gen IV VVT Camshafts; Gen V LT1 / L86 (6. Chevrolet Big Block (With Center Counter Weights) Voodoo LS1 W/ L92 Heads Hydraulic Roller Cam - GM V8 LS GEN III/IV 262/273; Hydraulic Roller Cam. Yes, our cams do have very high lift relative to our duration at. I use a 50/50 mix of coolant/water. 050" than what you are now using will result in power gains at all rpm levels. I was wondering what kind of timing curves some of you LS engine guys are running. BTR Brian Tooley Twin Turbo Stage 1 Cam Camshaft Fits 4. and the idle&timing was really lopey. 6) Turn the ignition off. Many early model timing chain tensioners are broken and this gives minimal symptoms, often only being noticed during a cam upgrade. I got it in my mind that a B28 can would be better choice (comes in about 3" vac, all in by 6"). 005 in the hole with Wiesco +0. the check engine code never returned, but I don't see a big improvement in my gas mileage My idle isn't perfect between 700-750rpm. New cars are confusing. This kit includes 16 LS6 valve springs. ) How You Can Tell Whether Your LS has VVT. Baker Engineering is a name synonymous with horsepower. Hi guys, anybody on here have experience with hp tuners and gen 4 ls tuning? Ive made some attempts on my camaro with a large cam ls7 and have had mixed results. I started out with 12* initial + 16* v. 2 Truck Cams; Stroker LS Camshafts. May 24, 2008 · Rough idle that goes away as soon as you start driving. i have almost 70deg of overlap in a std stroke ls1 with 10. These camshaft have a definite lope at idle and are best suited for dual purpose hot street/drag strip, hot marine or oval track applications. I want more of a rough erratic idle and big lift so its a Lunati 286 for me. 050in) 224° Intake / 234° Exhaust. • 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. The car should idle really poorly (depending on how big you went with the cam), and rpms will fluctuate a lot. Big Cam Runs Rich Or It Doesnt Right At All(suggestions Please) Thats one of the big reasons that larger cams idle dirty at low speeds. This article assumes that the basics of how and what a camshaft does is understood. Selecting a camshaft for a given engine's purpose usually involves a compromise between low- or high-end power options, and the lobe separation angle (LSA) is one of those factors where engine builders have to make a choice between those priorities. I am still having issues with the idle o2 readings showing lean, but off idle the readings are correct. Jul 22, 2008 · Start the engine and adjust the idle speed to that specified in the Tune-Up Specifications chart. ignition timing at idle was a big. 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. The LS1 Stage 1 camshaft was designed for enthusiast who want to increase power while maintaining excellent drivability and manners. COMP Cams Effect of Changes In Cam Timing and Lobe Separation Angle 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. Car & Truck Camshafts, Lifters & Parts. Turn the car on. The cam we have is the one that uses a stock converter. Chevrolet Big Block (With Center Counter Weights) Voodoo LS1 W/ L92 Heads Hydraulic Roller Cam - GM V8 LS GEN III/IV 262/273; Hydraulic Roller Cam. At low RPMs the port velocities aren't. Rocker Arm Ratio. Xtreme Energy Camshaft™ Dyno Results Xtreme Energy Cams™ bridge the gap between Magnum street cams and race only cams. Rev Limit RPM = At this RPM, the fuel and spark will be cut off, to limit the engine speed. Different cams will require different AFRs at this point. There is a tradeoff, however. There is a default base table that is used to automatically increase the IAC when cold. Engines with hot cams that are fitted with sequential injection management systems can run leaner idle mixtures than systems using bank or group fire. Welcome to LS1 Tuning Guide. You do this by tightening the lobe separation angle (LSA) between the intake cam's and exhaust cam's lobe centers with your aftermarket adjustable cam gears. Info/pics taken from personal experience, around the Internet, and ls1tech/ls2. This cam will pull hard to 5,000/5500 rpm. Please talk to our technical department regarding custom camshaft grinds. LSX Performance Parts. MSD Pro-Data+ Software For those looking for maximum control over the timing and rev limits of the 6LS, MSD has the Windows based Pro-Data+ software. Any advice on holding idle would be appreciated. 6L “LQ9” Engine Overview. Big heads want big cams to achieve their maximum potential, but-at least on a 6. Maybe I'm playing with fire but the gains are real. 4 pushrods, btr 675 springs, ls2 dog bone, 3/1 bolt kit, and a melling high volumke oil pump. Everyone wants a nice sounding cam in their hot rod with a "racey" idle. Apr 04, 2013 · mechanical curve that starts about 100 rpm higher than the engines idle rpm and have all 26° in by 2,800 rpm, this is a good general purpose timing curve when used with 12° initial timing set at engine idle. We sat down with Crane Cams and discussed all of these issues and how they relate to the LS series, and got an inside look at a cam comparison they ran on three of their most popular grinds for the LS3. 3 Vortec engine an RX-8, LS style aluminum typhoon intake, long tube headers, mated to a full billet 4L80E auto trans, problem is other than mild Cobb Tuning with Subaru's this is the first real tuning I'll be doing with HP Tuners, not gunna lie I'm a little lost in it all. The gains have been even greater on modified motors. Presented by Dan Maslic. Jun 10, 2014 · Engine is 2001 LS1, T56 transmission Stock injectors, stock MAF I've tried everything from reloading the initial tune again, to starting over fresh using some of the "Big Cam" tips on the HP Tuners forum. Picking up a cam catalog doesn't necessarily help because of the number of choices. Looking a bit further at the timing points, the first one we see on the diagram is the exhaust opening point. i have a msd btm. On an LS2 with a 112 lsa 228/230 cam, besides smoothing out timing differences from low to high airflow, I also had to decrease the timing reduction on overspeed and increase timing added for underspeed. This hurts some top end though. 622", 112 LSA using HP Tuners. so im not exactly sure what the compression ratio is maybe around 9:1? what is the total timing going to be about 38 at wot? if i. Gear Drives are a great alternative to traditional timing chains. The LSX Dr also recommends upgrading to an IWIS timing chain, available from Scoggin Dickey #SD3SR602. We have inceased the idle. The engine will idle and cruise just like an LS3, but the power increase is there whenever you need it. The LS1 Stage 1 camshaft was designed for enthusiast who want to increase power while maintaining excellent drivability and manners. Aug 19, 2016 · 1100 45kPa = AFR at 1100 RPM and 45kPa – this is typically just “off-idle” with very low throttle opening. Spark comes from the ignition system. 610" 114+4 THIS IS IT!!! The Stage 3 Turbo cam is one of the most historically victorious camshafts in our turbo offerings. I want more of a rough erratic idle and big lift so its a Lunati 286 for me. COMP Cams Effect of Changes In Cam Timing and Lobe Separation Angle 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 problem is; "race cars" that have those nasty sounding cams are completely different than cars that are driven on the street. Those who have this cam I am looking for fine tuning points to start at. Lunati LS Hyd Roller Cam 3-bolt, LS1 W/ L92 Heads, 277°/288°. With the initial timing set and the distributor locked down, you can the use the EFI’s computer to adjust timing for use with nitrous, boost, or simply to get better precision on your engine’s firing. The GenI and GenII Chevy small blocks came with comparatively small journal camshafts. note: the above cams can be used in the 351w & 302 high output engines by rewiring the distributor to firing order 1-5-4-2-6-3-7-8. From F-body to Corvette, Sierra to Silverado, G8 to GTO, we carry everything for making power with your LS or Gen V Ride!. The map above has a lot of idle timing because it came from my SVO with a big cam and it sounded mean with that much timingand it didn't have an IAC and the clutch was so grabby you had to rev it up to get it moving anyway so there was no way to use the timing adder method to "save" the engine from a stall (so I tuned it to sound mean at idle). , 110 centerline and 112. Turn the switch or pull the trigger or whatever on your timing light and watch that big pulley with the yellow or white timing mark. Aug 22, 2013 · The truth is that real-world test data is about the only way to get straight answers. This resulted in large timing swings at idle that offered a 'lope' similar to a mild cam. From custom racing and high performance engines, to Pro/Cam racing engine components, to street car upgrades, Baker Engineering’s dedication to racing and high performance has spanned the company’s 45 year history and continues to drive the organization. The new idle fuel number is now the starting point for your fuel table. If it keeps trying to die, give it 5% throttle just to keep it idling and slowly back the throttle off until it knows how to stay alive on its own. 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. 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. My injection timing table is now set at 265 degrees, the throttle response is very good. Your ignition timing, on the other hand, can be throw off by any number of little things. The Causes of Internal Engine Knock, and How to Eliminate it. May 17, 2017 · It’s not unusual to input 14 to perhaps 18 degrees of initial timing for engines with big cams. ) How You Can Tell Whether Your LS has VVT. Howards Cams has its new Rattler lineup of hydraulic flat tappet and hydraulic roller camshafts designed to do exactly that. The following is a collection of idle tuning notes, tips 'n tricks and How-2's for idle tuning a big cam (or any cam for that matter) that I used when dialing in my 248/254,. Engines with VVT will have a camshaft phaser actuator on the timing cover. What cam would be a good choice for my H/C 350-400whp build. This hurts some top end though. Holley products for GM's popular LS engine are dominating the LS scene as well. The car should idle really poorly (depending on how big you went with the cam), and rpms will fluctuate a lot. going for a cam with big lift will pay off but go to big and you will need pistons with valve relief the cam i run in my ls1 is. Ok wanted to test this screen capture software and new mic, they will get better! But so yeah decided to make a how to tune idle speed on your Gm Gen lll LS series engine. "The Rattler line are street performance cams that are designed to give a nice aggressive-sounding idle without sacrificing throttle response and horsepower gains," says Howards' Robert Lou. This cam can be used with stock torque converters, stock rear gears, stock intake manifold, stock exhaust manifolds etc. Everyone wants a nice sounding cam in their hot rod with a “racey” idle. There is a default base table that is used to automatically increase the IAC when cold. Looking a bit further at the timing points, the first one we see on the diagram is the exhaust opening point. FWIW many of the standard cam specs I have listed for the ls1 engine run a big split like 196/207 on a 116lsa. Most of the engine's budget is directed at supporting the turbocharger. High vacuum, smooth idle and maximum efficiency are characteristics of these cams. If you arent there to watch it, the coolant might get VERY lowso keep water and coolant handy and let it idle for 10 minutes or so while you baby sit it. Words And Photos: Richard Holdener Ignition timing is a critical element in any internal combustion engine. You do this by tightening the lobe separation angle (LSA) between the intake cam's and exhaust cam's lobe centers with your aftermarket adjustable cam gears. ) Special thanks to the guys on ls1tech (J-Rod, JMX, ect) A. To shift or move the powerband up higher along the rpm range (for 1/4 mile et. can, and the idle&timing dithered on that. The other big issue - and in America it's all about being big - is that street camshafts are often chosen as much for their lumpy idle quality as for their power potential. This cam can be used with stock torque converters, stock rear gears, stock intake manifold, stock exhaust manifolds etc. A "hunting" idle is a sure sign of too much timing. **551 cams are not recommended with compression ratio of 10:1 or higher. Chronicles of idle tuning LS1/big cam He hired my services to tune the engine and so far we've got VE and spark tables fairly dialed in. Mar 09, 2015 · It has big port raised-exhaust port heads and squared, 0. LIMITED WARRANTY Bullet Racing Cams, LLC and Ultradyne warrants that all of its products are free from defects in materials and workmanship. Anyone have any ideas?. The new idle fuel number is now the starting point for your fuel table. Nov 28, 2008 · IDLE TUNING The following is a collection of idle tuning notes, tips ‘n tricks and How-2’s for idle tuning a big cam (or any cam for that matter) that I used when dialing in my 248/254,. Be careful of adding to much timing - it can give a great no load idle, but with any kind of load will become erratic. Normal for idle to increase a bit when you create that vacuum "leak" and normal for idle and timing to not change when hooking to ported vacuum (little or no vacuum at idle). IDLE TUNING The following is a collection of idle tuning notes, tips 'n tricks and How-2's for idle tuning a big cam (or any cam for that matter) that I used when dialing in my 248/254,. Spark comes from the ignition system. Perfect for a weekend cruiser with a crazy tough idle & sound. This muddies the waters and can compromise performance. Over the years, fellow tuners have made files to help others setup tables in HP Tuners and they can be difficult to find. • The 12588670 is the wedge shaped guide that was used on the LS2, because they all had 1X cam gear with the three bolt cam. Looking at my total plan (wish), I'd like to end up with a maggie on top, so the cam I select will probably not be that big. If it keeps trying to die, give it 5% throttle just to keep it idling and slowly back the throttle off until it knows how to stay alive on its own. If the idle is still unacceptable then try adjusting the timing. Max timing used to be about 22 now it's around 30. 3) Camshafts; LS1 & LS2 Naturally Aspirated Camshafts; LS3. I am using a 7 pin HEI and have set the timing using static timing in the ECU and matched balancer timing marks to the commanded value in the Holley EFI software. Ford has a 460 cu. Maximum RPM. i have a msd btm. ers, valve locks, double roller timing set, cam lube, and a cam change gasket set (valley pan gaskets throttle response & idle. I have your Top End Kit with a flat tappet cam, how does Edelbrock recommend to break-in the camshaft? Do not allow the engine to run under 2000 rpm for the first 1/2 hour. Find Summit Racing® Pro LS Turbo Camshafts SUM-8706 and get Free Shipping on Orders Over $99 at Summit Racing! The Summit Racing Pro LS Turbo cams are affordable and specifically designed to optimize cam timing with turbochargers. 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 water or coolant pump is a mechanical pump which is responsible for circulating coolant throughout the radiator and into the engine which is driven by the engine serpentine, timing belt or timing chain. Specs are 226°/236° @. Your engine's optimum idle speed is the RPM that allows the lowest possible engine speed while allowing a stable idle. Tuning SD via the VE tables is the only way to go. 0 $ 380 00 AMS Racing Stage II Necromancer "Choppy Idle" Camshaft GM LS LS1 4. What Is an Exhaust Cam Actuator Solenoid? by Robert Moore In times past, camshaft and valve timing were synchronized based on the exact position of the camshaft gear when the timing chain or belt of an engine was installed. Pick the cam that fits your application, add a set of COMP Cam hydraulic lifters and you will be the talk of the town. But you also need compression and the correct spark timing. My learned friend also suggested the adjustable v. 5:1 compression with iron heads in small blocks, 7. The stock spring loaded timing chain tensioner was discarded and upgraded with the stationary "wedge type". Maybe I'm playing with fire but the gains are real. Nov 28, 2008 · IDLE TUNING The following is a collection of idle tuning notes, tips ‘n tricks and How-2’s for idle tuning a big cam (or any cam for that matter) that I used when dialing in my 248/254,. 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. 0 ANY ADJUSTED PARAMETERS AND WHY?: AFR Idle through Boost settings for E85 and Turbo. Spring Kit Components; Camshafts. Aug 16, 2009 · There’d likely only be a 20 to 25hp spread if using earlier, ’98-style LS1 heads. I am running a LS1 with few more cubes, but a weaker much lighter block :/ Good luck on your choice!!!. Thank you kindly!. Jan 21, 2019 · How to Fix Big Cam Surge on HP Tuners with 600HP LS7 Z06 : Cam Surge - LS1,LS2,LS3,L99,L92 HP Tuners Target Idle Tuning for Mild to Large Camshafts I THREW A BIG CAM IN MY LS1 THIRDGEN. High vacuum, smooth idle and maximum efficiency are characteristics of these cams. When first installed, the only changes I made to the EFI software (EFI V2) was to set the idle speed based on coolant temp and fan turn on/off temp. i have almost 70deg of overlap in a std stroke ls1 with 10. I own a 2013 Chevy Cruze LS with 101,300 miles on it. Cam Gear Tuning. I could tool my DBW ls1 around from about 1200rpm upward with that comp XER273HR cam without issue. Engines with VVT will have a camshaft phaser actuator on the timing cover. A 114 will smooth the idle out as well. Stamped Steel. 0L-based engine-the 277 LR and. We also knew that. The heads need a cam with a decent size split in order to let the exhaust breath better as the exhaust ports are small compared to the intake. I understand it's a mildly hot cam, and it's not reasonable to expect it to idle at 700 RPM, but I figured 800-900 RPM would be achievable. The only time it'd surge was turning at roundabouts at very low almost idling revs. engine is not. Below is a table of advance requirements and expected idle speeds for a range of cam specifications. We use and abuse our test 350 small-block mule on the dyno with four COMP Cam swaps and give you all the numbers. Camshafts and lifters help determine how powerful your engine can be. 1100 45kPa = AFR at 1100 RPM and 45kPa - this is typically just "off-idle" with very low throttle opening. This provides a condensed version of the complete camshaft specification listings that appear on each page of the Engine Application section that follows. LS1 Tuning Explained - Why they gain so much from just a tune. Initial Setting The ideal initial timing will pro-vide a clean idle and crisp throttle response. 12 off my ET and gained 1 mph. Camshaft Duration (@. Be careful of adding to much timing - it can give a great no load idle, but with any kind of load will become erratic. We sat down with Crane Cams and discussed all of these issues and how they relate to the LS series, and got an inside look at a cam comparison they ran on three of their most popular grinds for the LS3. While the big cam companies and mail-order houses like to sell off-the-shelf cams, most engine builders are much more. Cracker and timing tables need alot of work but when they are right, the car is a dream to drive. +Compare Turbocharger System, T76, Two Evolution 35mm Wastegates, Spearco Intercooler, Chevy, Manual, Kit. 6/1 with a high overlap cam surging a bit on the smallblock car, 14. i also have flat top pistons and big chamber 1. Ford has a 460 cu. Nov 28, 2008 · IDLE TUNING The following is a collection of idle tuning notes, tips ‘n tricks and How-2’s for idle tuning a big cam (or any cam for that matter) that I used when dialing in my 248/254,. The gains have been even greater on modified motors. 99 Ships directly from the manufacturer on 12/03/19. Hooking the vac advace to manifold to get 18 or so will usually smooth out the idle even more. 3/Hi-ram/Twin S366 combination, the Stage 1 Twin Turbo cam has proven to be a versatile camshaft that performs well in a wide range of applications. Hook the timing light to any one cylinder and watch the flash illuminate the timing mark. idle the pcm has a number of parameters that influence the idle behavior of the engine. Big cams need stable timing. At this point Eric delved into the MSD 6LS box and tried a different timing curve chip. just wondering what sort of timing people are running with big cams. Hooking the vac advace to manifold to get 18 or so will usually smooth out the idle even more. Light choppy idle. roller camshafts for engines originally equipped with roller cams mc24226 hyd 3 212 222 289 300. Timing Components ; Valvetrain AMS Racing Stage II Necromancer "Choppy Idle" Camshaft GM LS LS1 4. When using a 3-bolt core camshaft you will need a new camshaft sprocket. These grinds exhibit strong mid-range to top end torque and horsepower. The shape of the cam lobe dictate when the valve opens and closes in relation to crankshaft position (aka the cam timing), and how far the valve is opened (aka the valve lift), as well as how long the valve is open and closed (aka the duration). Idle Learn MAX = This is the maximum number of steps that can be learned up. If the idle is still unacceptable then try adjusting the timing. May 07, 2016 · even moving the idle screw a HAIR belowim talking maybe 1/8th of an inch of turnthe engine sputters and starts to die. With these newer injected, computer controlled motors, you have a lot more control of all of these parameters for fuel,spark ,airflow etc. 622", 112 LSA using HP Tuners. Runs a carbureted LS engine without complicated EFI hardware; Map a timing curve using Pro-Data+ software. ON NO ACCOUNT use these settings before the maximum advance on the distributor has been correctly limited. Decrease in fuel economy. Pushrod length needs to be checked on assembly prior to ordering. ) • Click Save.