Help highly modded tahoe wont spin a tire
Jan 20, 2022 | 05:51 AM
#51
In short, it’s the converter.
My truck on 37’s had a similar converter(60E) and it launched pretty hard in 4wd. Swapped to a 10.5” 3600 converter and it went from just launching hard to being nearly uncontrollable and spinning the tires in 4wd.
My truck on 37’s had a similar converter(60E) and it launched pretty hard in 4wd. Swapped to a 10.5” 3600 converter and it went from just launching hard to being nearly uncontrollable and spinning the tires in 4wd.
Jan 20, 2022 | 10:31 AM
#55
An 80E in a Tahoe and big wheels are not a great combination.
While I think you can improve on the tune you have now, it is never going to be a tire fryer.
I would address your PE settings, the factory methodology of using TPS is not a good indicator of load in heavy Tahoe. Also remove the RPM delay.
There is negative timing in your high load/low RPM table.
Your torque management settings are stock.
A stable idle begins with correcting the airflow models (MAF and VE) and then setting the IAC steps. Otherwise there is not enough range to control it.
While I think you can improve on the tune you have now, it is never going to be a tire fryer.
I would address your PE settings, the factory methodology of using TPS is not a good indicator of load in heavy Tahoe. Also remove the RPM delay.
There is negative timing in your high load/low RPM table.
Your torque management settings are stock.
A stable idle begins with correcting the airflow models (MAF and VE) and then setting the IAC steps. Otherwise there is not enough range to control it.
Jan 20, 2022 | 10:32 AM
#56
Thread Starter
Teching In
Joined: Aug 2021
Posts: 33
Likes: 7
From: norther Mississippi
what brand of converter. My only thing about a larger converter is this is the only truck I have at the moment that can tow heavy. /34' camper-22'carhauler loaded/ have you towed with yours? I do plan on getting a HD flatbed in the future
Jan 20, 2022 | 10:32 AM
#57
Thread Starter
Teching In
Joined: Aug 2021
Posts: 33
Likes: 7
From: norther Mississippi
Jan 20, 2022 | 10:37 AM
#58
Thread Starter
Teching In
Joined: Aug 2021
Posts: 33
Likes: 7
From: norther Mississippi
4L80E is not really a problem for burnouts with the right converter and something that actually makes some low-end torque. My old 350 in a heavy *** Express conversion van would break 31" tall 275 wide tires loose with a 3.73 gear and stock B82 converter.
My guess is probably some torque management limiting the torque output when you hammer on it. TQ management and abuse routines will both kick in and cut the timing if not addressed correctly.
4L80E is not really a problem for burnouts with the right converter and something that actually makes some low-end torque. My old 350 in a heavy *** Express conversion van would break 31" tall 275 wide tires loose with a 3.73 gear and stock B82 converter.
My guess is probably some torque management limiting the torque output when you hammer on it. TQ management and abuse routines will both kick in and cut the timing if not addressed correctly.
Jan 20, 2022 | 10:40 AM
#59
Thread Starter
Teching In
Joined: Aug 2021
Posts: 33
Likes: 7
From: norther Mississippi
An 80E in a Tahoe and big wheels are not a great combination.
While I think you can improve on the tune you have now, it is never going to be a tire fryer.
I would address your PE settings, the factory methodology of using TPS is not a good indicator of load in heavy Tahoe. Also remove the RPM delay.
There is negative timing in your high load/low RPM table.
Your torque management settings are stock.
A stable idle begins with correcting the airflow models (MAF and VE) and then setting the IAC steps. Otherwise there is not enough range to control it.
While I think you can improve on the tune you have now, it is never going to be a tire fryer.
I would address your PE settings, the factory methodology of using TPS is not a good indicator of load in heavy Tahoe. Also remove the RPM delay.
There is negative timing in your high load/low RPM table.
Your torque management settings are stock.
A stable idle begins with correcting the airflow models (MAF and VE) and then setting the IAC steps. Otherwise there is not enough range to control it.
Last edited by Adambrazil; Jan 20, 2022 at 10:59 AM.
