Oct 24, 2006 · in any case, once you've got the engine running and idling, if you start by making all the bins around your idle the same, and move them up and down together I think you'll soon get a smooth idle. fwiw, i'm idling around 700rpm with 304/288 cams on a 1.6cyl with ITB's. lope about 100-200 each way.. "/>
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Big cam idle tuning

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Today we are looking at the basics of camshaft idle tuning, we look at the 3 different generations and some of the initial settings we need to setup in order to get the cam.

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promotes very good vacuum at idle and at low speed. At very high rpm, a dual plane manifold will loose some efficiency. For this reason, there are single plane manifolds available. Known also as “360-degree” manifolds, the single plane manifolds typically have large intake runners and a large, open plenum under the carb. Very.

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Post subject: Re: Tuning Idle for 04 WRX with bigger cams question. In order to improve idling you may retard intake cam phase (1 tooth counterclockwise) and\or increase idle speed about 100 RPM. Or increase ignition timing at idle a few degrees.

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few hundred rpm above idle speed, then drop to idle, the idle mixture is probably a bit too lean. Turn the fuel screws out. Use a minimum of half turn increments until you know you've just about nailed it. You'll drive yourself up the wall trying to tune the thing in eighth or quarter turn increments if you're a mile off.

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IDLE TUNING --Really only need to do this if you have installed a cam. Special thanks goes out to WS7 on Ls1tuning.com Idle Limiters --> Go to Edit --> Engine --> IDLE --> IDLE RPM --> Target Idle speed VS ECT Idle Speed: 950--Start at 950 to get car to idle, then lower 25 rpm at a time until you get idle you like that will keep car running.

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Typically anywhere from 50-150RPM of surge is normal for a larger cam or a light rotating mass, and trying to fight it can end up causing larger speed fluctuations and instability. Try lowering them substantially to try to let the car idle more naturally..

Idle lope tune, no cats, and bullet mufflers dumped would sound 99% like that at idle. That is if all you're going for is sound Yea not gonna mess with the ghost cam tune. your right though Jun 25, 2014 #4 Voltwings Well-Known Member Established Member Joined Oct 1, 2013 Messages 2,739 Location Houston.

Sep 01, 2004 · Instead of 16 to 18 inches of manifold vacuum at idle, many big cams will support barely 4 to 6 inches. This reduced vacuum requires more throttle opening to feed sufficient air to the engine since....

Typically anywhere from 50-150RPM of surge is normal for a larger cam or a light rotating mass, and trying to fight it can end up causing larger speed fluctuations and instability. Try lowering them substantially to try to let the car idle more naturally..

If the idle speed exceeds 900-950 rpm, use the idle speed screw to slow the engine down. then readjust the idle mixture. This isn’t a difficult procedure but it can be tough if the engine has a big cam and low manifold vacuum. If the carburetor requires a large throttle blade opening, modifications will be necessary (see "Curing Holley Hiccups.

If the idle speed exceeds 900-950 rpm, use the idle speed screw to slow the engine down. then readjust the idle mixture. This isn’t a difficult procedure but it can be tough if the engine has a big cam and low manifold vacuum. If the carburetor requires a large throttle blade opening, modifications will be necessary (see "Curing Holley Hiccups.

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Drill 1/16" holes on the back side of the primary bores and reset your idle speed. leave your timing and vac alone. The worst way to tune is to change several things all at once..you don't know what is and isn't helping. Go back to baseline and change 1 thing and then evaluate.

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idle fuel will be off the main VE table, the only change is after the time out which is normally 20 seconds it will switch to the idle AFR table which is richer than the main 20-100kpa afr table. i normally change the 20 seconds to 5 but thats just me No matter what the question is, the answer is always more horsepower! Just starting out?.

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 I set the Enable Closed Loop to 1200 RPM, because the car idles at 850-900 RPM at operating temperature 2 section that are using hp to tune there turbo setups Fender Vintage RI Jimmy Page Tele.

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Theres a bunch of cam choices, most aftermarket are a pain to tune. Easiest and cheapest is the 6.4 or 6.2 cams. No phaser limiter needed for either. 6.2 would be good for supercharger. The cam along with mopar performance springs, buy individually. Comes out around 70-80.00 for springs that way. You didnt say if it was auto or stick.

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600 Posts. #2 · Oct 28, 2007. If you read the service manual, it states that the idle should be no lower than 1000 rpm. This is to provide the proper oil pressure to all areas of the motor. You can set the idle lower, but you do so at risk of damage to components. With the older motors, like the Shovels, Pan, and Knuckle heads, they were very.

The real issue you are having is the Comp 274 is not a street cam. It doesnt really make power till around 5,000rpm and needs an engine that has been modded heavily...heads, intake, exhaust, custom dyno tuning, etc...you cant tune that cam buy guessing A/F adjustments...you are asking for bad things to happen.

Typically anywhere from 50-150RPM of surge is normal for a larger cam or a light rotating mass, and trying to fight it can end up causing larger speed fluctuations and instability. Try lowering them substantially to try to let the car idle more naturally..

Cam Lope at Idle: Aggressive Description: The S&S 475C again made the second best peak HP in our testing, however the 114 torque curve was even better than the 107 test. Idle was not as aggressive as in the 107, likely because of the different exhaust orientation. A great candidate for a big bore application.

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Oct 24, 2006 · in any case, once you've got the engine running and idling, if you start by making all the bins around your idle the same, and move them up and down together I think you'll soon get a smooth idle. fwiw, i'm idling around 700rpm with 304/288 cams on a 1.6cyl with ITB's. lope about 100-200 each way..

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Jan 08, 2010 · About 15% less VE at 1000 RPM, about 5% less VE at 2000 RPM and may improve volumetric efficiency at high RPM. 1 tooth advanced exhaust cam also adds lobe separation and cuts torque almost anywhere for NA engine but may improve turbine efficiency. Post subject: Re: Tuning Idle for 04 WRX with bigger cams question..

The R&D Big Cam Idle Tuner will work to allow a perfect Engine Speed Idle (RPM) with any Camshaft kit, and with just about any LSA Package all the way up to super aggressive R&D RC4.

Cam Lope at Idle: Aggressive Description: The S&S 475C again made the second best peak HP in our testing, however the 114 torque curve was even better than the 107 test. Idle was not as aggressive as in the 107, likely because of the different exhaust orientation. A great candidate for a big bore application.

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PCM Tuning Process Flow 1. DISABLE ALL TORQUE MANAGEMENT This will eliminate all torque management within the PCM. Ignore this step for a standard transmission (M6) and continue to step 2. A. Open the VCM Editor>Edit>Transmission>Torque Management B. Set Abuse Mode Enable = False C. Set Abuse Mode RPM, Abuse Mode TPS and Abuse Mode Speed = 0.

Just a question regarding fine tuning the idle. I have my desired rpm at 850 rpm in drive, from my logs I can see fluctuations in rpm between 850 and approx. 900 rpm. ... It just seems like with the cam that's in it it has a big variation of idle rpm. Is it normal for a big cam to swing around desired rpm so much? Just never wants to settle.

This tune will incorporate all the changes necessary for your specific modifications and includes any tuning support needed along with datalog review and revisions to fully calibrate the vehicle. This is for NEARLY STOCK VEHICLES ONLY. $450+ - Online/Remote Tune - THE MOST ACCURATE METHOD OF TUNING A VEHICLE. 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,. Idle air bleed and idle feed restriction is poorly named, both of them control the fuel to the transfer slot and idle circuits.

The tuner is the tool one uses dial in and "tune" the bike. It is a common misconception that one device performs better than the other, when in fact it is the one who is tuning it that makes the difference. Whether it be a dyno operator, tuning specialist or kid next door, the FP3 is as flexible and powerful as you want it to be or as simple.

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1 Posts. #17 · Nov 7, 2018. The injectors are adjusted via the firing order 1-5-3-6-2-4 and should be set along with the same valves at 6-inch lbs or finger tight. So if your timing mark is on A which is 1 or 6 find the valves that are loose that is.

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With the piston at TDC, the intake valve should be opening and reached 0.190 ins lift and exhaust should be closing and at 0.130 ins lift. Standard T140 Camshafts. Average standard timing measurements show Intake cam timing opening of 40° BTDC and closing of 74° ABDC (lobe center 107°), and Exhaust cam timing of opening 50° BBDC and closing.

Sep 29, 2014 · I'm running Comp Stg 3 blower cams with the idle set around 850rpm's. Tuning with the PRP software on 93 octane. SCT2400 meter, 60's, triple returnless pumps. Motor is a 304ci 4V with race ported heads, Kooks LT's. About 9.3:1 CR. Vortech T-Trim at 10psi until I get a handle on the tuning. Checked and double checked for no vacuum or plumbing leaks..

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The car runs in the 13's but you can see how mild the cam and engine combination is. TUNING TOOLS. ... Also, with a big cam just off idle and just as you go to light cruise at say 30-35 mph, you may have a dodo area (in this area of the prom maps, BLs are lousy regardless of timing afr), What is happening is the engine is starting to wake up.

This is a vacuum port on the carb that provides full manifold vacuum at curb idle. This is best for cruising/part throttle and will give the best performance overall. WATCH YOUR IDLE RPM WHILE YOU SET INITIAL ADVANCE TIMING!!! You note that the centrifugal advance curve that I recommended above starts at about 800 RPM.

k24/20 big cam tune? hello ladies and gents, i have a k24/20, with a fender exit, 4.5 dc cams, 12.5 comp pistons, and 1650cc injectors, on 93. im having issues just turning on the car or keeping idle, ive just been trying random tunes, but have had no success. Can anyone help me with a base map to at least get me running? thanks!!.

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Ensure that the throttle cam is adjusted back so as the butterflies on carbs are closed. At that point start motor, get her warmed up and set timing to 5 degrees atdc. Then adjust teleflex and throttle cam so that they are locked in at that exact spot. Then use the throttle adjust screw to work the whole assembly at once to raise idle (and.

We are starting the tuning process on the Superado, our 1000hp Silverado build, and no better place to start than getting the truck starting and idling well ....

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BigComm Pro is the new BS3 software application to enable high fidelity tuning of BS3 Engine Management systems. This, combined with MegaLogViewer BigStuff3 and ... Engine combos once deemed to radical for the street could be tamed to chug comfortably on the freeway and idle smoothly without sacrificing any power. ... where big block-level air.

If the cam is between 224-236 degrees duration (again, on the intake side) try a target of 900 RPM and for cams bigger than those listed above, set your target engine idle speed to 975 RPM. These will be a good, easy starting point depending on your engine setup. Note that these idle speeds are for the engine idling at normal operating temperature..

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 I set the Enable Closed Loop to 1200 RPM, because the car idles at 850-900 RPM at operating temperature 2 section that are using hp to tune there turbo setups Fender Vintage RI Jimmy Page Tele.

Tuning complicates things further, as varying compression ratios, camshafts, boost pressures, and so on all affect the ideal air/fuel ratio needed at any one point, indicating the importance of having your car remapped as you add tuning components to it.

With the car idling, and vacuum gage connected, try to achieve maximum vacuum by advancing the timing (with adjusting the idle to be a constant RPM). This is where the motor. 2014+ · LT car · LT truck · Feb 16, 2022. GM throttle relearn with Hptuners For 2008-2022 LS and LT models. Feb 16, 2022. Throttle and data logging. Nov 06, 2021. 02 Sensors and why they are important! Nov 02, 2021. Email tuning procedures. Nov 02, 2021.

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1. Take the 10 pin connectors apart (salt and pepper shakers). 2. use a pick like tool to spread the male terminals open more so they make better contact. In the center of each male terminal there is a small seam and seams down the sides of the terminal which allows you to spread them open. 3. Apply some dielectric grease to the terminals 4.

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Arrow A points to the transfer slot which is excessively exposed at idle. Ideally, curb idle should barely expose the transfer slot — 0.020 to .030-inch. One way to measure this would be to place a .025-inch feeler gauge next to the slot. If you can see some of the slot, the throttle needs to be closed even further.

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lager cam idle tuning. Jump to Latest Follow 1 - 6 of 6 Posts. A. akivon ... Registered. Joined Jul 1, 2012 · 2 Posts . Discussion Starter · #1 · Jul 1, 2012. i changed a large cam and the idle speed is surging ,how to tuning the.

1. Take the 10 pin connectors apart (salt and pepper shakers). 2. use a pick like tool to spread the male terminals open more so they make better contact. In the center of each male terminal there is a small seam and seams down the sides of the terminal which allows you to spread them open. 3. Apply some dielectric grease to the terminals 4.

Adjust timing until you get the best vacuum. A SBF seems to make best power around 36* total timing, all in by 2,500-3,000 rpm's. So adjust your mechanical advance to get there. Vacuum advance is a good idea, even for a big cam like that. On light throttle cruise, you'll want the timing to advance anywhere from 4-10*.

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Sep 19, 2015 · Tuning new cams is just like tuning the stock cams. I went from jdm cams in my 2j to S1's. That was a huge jump but don't get ancie. See what the motor needs. It's not that the motor wants less fuel, it really needs more, the deal is large cams idle in a different kpa zone, say from 45 to 65kpa..

Adjust timing until you get the best vacuum. A SBF seems to make best power around 36* total timing, all in by 2,500-3,000 rpm's. So adjust your mechanical advance to get there. Vacuum advance is a good idea, even for a big cam like that. On light throttle cruise, you'll want the timing to advance anywhere from 4-10*.

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ICL. +4. The SS3 LS7 camshaft will provide a performance idle and very strong performance improvement through the upper mid-range to high RPM. This is the perfect cam for the hardcore street / strip enthusiast, and makes more torque and horsepower than our SS1 and SS2 LS7 cams. Very strong to 7400 RPM.

This tune will incorporate all the changes necessary for your specific modifications and includes any tuning support needed along with datalog review and revisions to fully calibrate the vehicle. This is for NEARLY STOCK VEHICLES ONLY. $450+ - Online/Remote Tune - THE MOST ACCURATE METHOD OF TUNING A VEHICLE.

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tuning is either getting a chip with all the parameters, load tables, a/f, timing, egr/thermactor delete, etc; or getting an alternate eec system (tweecer, pms,....) that will allow you to make the changes in the system "software" so the improvements made (h/c/i, bigger injectors, etc) could be maximized.....usually made using a dyno as the way.

B.Idle Stops; with the motor off, pre-adjust the idle stop (idle speed) by backing off the idle speed screws on both carbs until it does not touch the throttle stop tab, then slowly turn it inward until it just slightly touches the tab, then 1/4 turn more.

Oct 28, 2014 · My questions are really centering around idle. I have a good feel for how to tune the idle well (been reading lots of tutorials and howtos), but one thing that is not touched on specifically is target idle timing. The stock tune is around 13* to 15* timing at idle. The stock cam is 204/211 with 117 lsa. The ls3/525 cam is 226/236 with 110 lsa..

big cam idle and timing *UPDATED* Engine, transmission, rear-end, driveline, fuel system etc.. 11 posts • Page 1 of 1. oklamopar ... Ive done the RV and similar cams with no problems but never the big lift cams. any help before i get another cam. Thanks. Skip. Last edited by oklamopar on Wed Jul 02, 2008 5:51 am, edited 1 time in total.

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- half the Proportional (ex. from 50 to 25) and Integral (ex. from 10 to 5) Enable RPM Error values to smooth the idle, - add around 6-8 g/s to Base Airflow, - add 2-4 g/s to Startup Airflow Initial and add 50 rpm to Delay, - add 1-3 g/s to Friction Airflow Initial, - reduce Cranking VE by 5-10%,.

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Joined Oct 12, 2011. 1,206 Posts. #3 · Feb 23, 2015. Surge at steady cruise is more than likely caused by too much spark advance. Usually caused by vacuum advance pulling too much timing in. Your distributor probably needs the vacuum advance limited. Your mechanical advance might also need limiting.

I like it so it can idle out without polluting my small house first (13.6/1 with a high overlap cam surging a bit on the smallblock car, 14.6/1 on the big block with a EFi style roller cam). The new idle fuel number is now the starting point for your fuel table.

2014+ · LT car · LT truck · Feb 16, 2022. GM throttle relearn with Hptuners For 2008-2022 LS and LT models. Feb 16, 2022. Throttle and data logging. Nov 06, 2021. 02 Sensors and why they are important! Nov 02, 2021. Email tuning procedures. Nov 02, 2021.

If the cam is between 224-236 degrees duration (again, on the intake side) try a target of 900 RPM and for cams bigger than those listed above, set your target engine idle speed to 975 RPM. These will be a good, easy starting point depending on your engine setup. Note that these idle speeds are for the engine idling at normal operating temperature.

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Ok, I will post a tune but looking for the right direction to fix the stumble/stall the motor has after a hard rev in neutral. I have tried more idle minimum airflow, timing, adders, multipliers, ect but can't get the right combination. I don't have any issues with it stalling in gear with the stall anymore but it still likes to stall after a hard rev.

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If you think it can, lower the target idle speed by 50 or 100 RPM (depending on your hunch) and then go through Steps 1-4 again, this time reducing the airflow minimum values by a small.

Streetable cams usually range from very mild and close to stock idle to as big as can fit in the engine. Small cams usually have minimal overlap and 50 thou durations in the 210 to 225 range. Mild cams 225 to 235 Big cams for a street car are above 235. Small cams often make similar peak torque to bigger cams.

TUNING THE IDLE SYSTEM: (Idle – 1/8 throttle) The HSR idle system has two tunable components: the Pilot Air Screw and the Pilot Jet. The air screw’s purpose is to fine-tune the idle mixture. The pilot jet controls the total amount of fuel passing through the idle system. The pilot jet can be exchanged for a richer or leaner one.

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Idle Feed Tuning, Generally engines with big cams are also fitted with larger, mechanical secondary carburetors. These carbs generally will be fitted with four-corner idle mixture screw adjusters. Idle Tuning is a very important part of tuning any EFI system, especially our self-learning units like Sniper or Terminator X EFI. Getting the throttle blades and IAC to work together will keep your fuel injected hot rod running smooth and predictable. Featured Products. Sniper EFI. 479 Products. View Parts.

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Seems to. Me like it’s basically in the same place as before, but it immediately seemed to respond better at idle and in the throttle. 3. Set the timing to 12 degrees, maybe. Search: Hp Tuners Big Cam Tuning. Just click on the graphic above to read more about our remote tuning services, and make sure to check out our "Products for Sale" page if you still need to acquire your tuning hardware or software 53: 112: 6,800 : Harley us debt clock com - 80 HP, 105 ft-lbs Couchtuner - Watch Series Online For current HP Tuners MPVI Cable, MPVI2, RTD Interface, or nGauge.

Mustang S197 Forums (2005-2014 Mustangs) 2011-2014 Mustang GT Tech. Ghost Cam Idle Tune - 2011 Mustang GT 5.0L 4V - Bama Custom Tuning Preview.

HP Tuners GM Gen V Training Part 27: Idle Tuning Demo / Big Cam Tuning walks you through a basic idle tuning demonstration. We also explore data log examples showing what to monitor and where to make changes to get the torque based idle control calibrated properly. HP Tuners GM Gen V Training Course.

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The throttle can have its blade kicked out so it is more open when at zero throttle and this gives it more air. This will help it idle better but there are limits of how far this can be pushed before the engine computer will throw an error code reporting that the throttle position sensor is out of range.

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Jun 10, 2016 · Obviously a big cam is gonna have to be pretty high. Start higher than you think as it is easier to tune down, than tune up. Lock in idle spark Set your entire high octane and low octane tables to desired spark value..

Alright! I finally tried a bigger main jet. Here's some tuning notes:-As usual, idle mixture any leaner than 13:1 causes occasional misfires. I set mine ~13-Idles smoothest between 530 to 560 rpm-Going from 53 to 56 main jet made put my mid throttle (5-10"hg) mixture ~15:1 (it was 17:1) and made a noticeable difference in drivability:.

Cam retard. Retarding the camshaft (the intake & exhaust valves both open & close later) has these general effects: » cranking pressure is reduced. » tendency to knock at low speed is reduced. » low speed power is reduced. » idle speed is probably reduced. » idle smoothness is increased. » peak torque may be reduced, but at higher RPM.

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rough idle like big cam. Jump to Latest Follow Status Not open for further replies. 1 - 6 of 6 Posts. S. skvette · Registered. Joined Apr 20, 2007 · 16 Posts . Discussion Starter · #1. Arrow A points to the transfer slot which is excessively exposed at idle. Ideally, curb idle should barely expose the transfer slot — 0.020 to .030-inch. One way to measure this would be to place a .025-inch feeler gauge next to the slot. If you can see some of the slot, the throttle needs to be closed even further.

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I tried upsizing the idle air bleed screws from the stock 0.07 to 0.08 (largest I could get at the moment) and it might have had a slight impact on a/f (like 0.1, hard to say). Upsizing them increased the idle RPM (and downsizing back to 0.07 decreased idle RPM), but had next to no effect on the a/f.

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