Car rolls to fast in gear without throttle on takeoff

[prolss]

Hi I have a LS1 with a 232/234 595 598 112 cam with a 4l60e, 2800 to 3200 high stall converter, 4.10 gears. I start the car put it in drive without accelerating and the car takes of like I'm accelerating, what do I change to slow it down, also it "feels like there is no stall converter when taking off (accelerating) in first gear".

This is the tune in the car done by a professional tuner. 2004 VYII SS LS1 CAM 411GRS EDIT.hpt

If you have read my other post I am no longer running the 1BAR SD Enhanced (RTT) operating system.

[Ben C]

Well you would try to get the car to idle lower.

[HackAbuse]

If you can, get the idle into the 700-900rpm zone and lower Idle Running Airflow

[Ben C]

From other thread of yours I see you have messed with a professional tune.

Because you had a professional tune, and then changed to 1 bar sd tune, you can't just expect to copy over the pro tune to the different os and everything be sweet.

Wide open throttle would be an issue also I imagine.

Do you have a wideband? You can't guess stuff when tuning.

That cam can easily idle at 850, less if you try. What is yours idling at now?

[prolss]

The car idles at 840rpm.

[Ben C]

Was the problem apparent before you changed os?

Are you sure it's a 3000rpm converter?

[prolss]

From other thread of yours I see you have messed with a professional tune.

Because you had a professional tune, and then changed to 1 bar sd tune, you can't just expect to copy over the pro tune to the different os and everything be sweet.

Wide open throttle would be an issue also I imagine.

Do you have a wideband? You can't guess stuff when tuning.

That cam can easily idle at 850, less if you try. What is yours idling at now?

Hi Ben i have put the pro tune back in. I don't have a wideband yet. The pro tune also makes the car accelerate without the throttle being pressed. My car is idling at about 850rpm in neutral and about 840rpm in gear. Wide open throttle was changed because the original pro tune was tuned with 3.08 gears, now it has 4.10 gears.

[prolss]

Was the problem apparent before you changed os?

Are you sure it's a 3000rpm converter?

Yes it was . Its a 2800 to 3200 it flashes to about 3100 in 2nd and 3rd.

All my other cars that i had high stalls in them would roll back on a hill in gear without braking or accelerating they weren't fuel injected. But this car either holds still like the brake is on or rolls forward.

[Ben C]

I would be looking at the airflow tables,
Base, throttle cracker, rolling idle and see if that helps.

[Asylumwarp]

Anyone paying attention to his Timing (Idle spark in gear) before high octane is engaged?? Seems a little HIGH.... That can push the car forward as well. You can use the scanner to force your timing to a certain degree to find if that helps with the pushing. Also... I see your Throttle Cracker Airflow is set what seems high to me.. And also your base running airflow seems high. All these things can push a car in gear.. Start reducing the airflow tables by 5% at a time in your idle regions your having issues.

[prolss]

2004 VYII SS LS1 CAM 411GRS 19Jul16acceleratingbyitself.hplThis is a the Scanner file of the car picking up speed without the throttle being used.

[Asylumwarp]

I still think what I stated above is pushing the car. The timing especially.
The airflow tables then come in second and need adjustment too.

[prolss]

ok ill give it ago

[Asylumwarp]

Keep us posted. I'd definitely try ALL the settings. Change your timing to say 15-20 degrees for idle, lower your base running airflow some, lower the cracker tables .... I think if you do 5-10% changes on the whole table at a time, you will see the changes it makes. Its a trial and error deal for each car and cam... We all have the same issues. Just work at em..
You'll get it!

[Ben C]

just looked, your throttle cracker table is crazy!!!

try to compare to something else, yours has HEAPS added as car just starts moving, which would explain your issue a fair bit.

[prolss]

Hi I have got the car to not accelerate as much when put in gear without accelerating. I have dropped my idle in PN/G from 850/820 to 750/720, dropped the timing in idle spark advance In Gear also I've been playing around with the Base Running Airflow idle airflow, throttle cracker airflow and Throttle Cracker enable speed and disable speed if I drop the idle airflow and throttle cracker to much the rpm drops dramatically and stalls most of the time when coming to a stop. Since I have changed those settings the car only accelerates to about 5-6km/h where before the changes it could go up to 24km/h or more. I still haven't finished with it but it is a good start and I would like to thank the people that gave me advice.

This is the new operating system: [ATTACH]04 VYII SS LS1 CAM 411GRS EDIT.hpt[/ATTACH]

This is the Scanner file: 26Jul16e.hpl
This is the Scanner.cfg file: VCM Scanner.cfg