Changing tire sizes and program parameters
Thread Starter
Racer
Joined: Jan 2011
Posts: 275
Likes: 2
From: Tucson Arizona
Changing tire sizes and program parameters
I changed my tires to completely different sizes. In the tuning tables I can reset only the rear diameter. (That is some myopic programming).
Do I enter the overall diameter or just the rolling diameter? I assumed the rolling diameter but the Service Traction Control problem arises if there is even the slightest bit of spin on the rears.
Do I enter the overall diameter or just the rolling diameter? I assumed the rolling diameter but the Service Traction Control problem arises if there is even the slightest bit of spin on the rears.
Le Mans Master
Joined: Aug 2005
Posts: 5,375
Likes: 328
From: CA.
St. Jude Donor '13-'14-'15
What kind of programmer do you have ?? You need just to change the Tire height table and "nothing else"---A stock C5 is supposed to be tabled in at 26.00 " just put in your new size
PS: However when making a GEAR CHANGE on a C5 do NOT make any corrections --because the speedo sensor on a C5 is on the output side of the axle and not on the input side of the trans like on a camaro/silverado-
ALSO very important--The ABS and traction control systems uses data from the wheel speed sensors at each wheel location
The ABS uses the sensors to keep the tires from SKIDDING during a hard stop
The TC uses the sensors to keep the tires from SPINNING at a hard launch
Tire sizes overall don't matter HOWEVER it is VERY important to never let the tire height differance between the front and rears to be much off more than 1" This is called the "split" example rear height 26" front height 25"-----This is NOT progarable or changable and is permantley set into your ECM /brake contoller and BCM--(the rears always should be taller ) If you deveiate too much both your ABS and TC systems may not work properly or not at all--(hence your codes)
PS: However when making a GEAR CHANGE on a C5 do NOT make any corrections --because the speedo sensor on a C5 is on the output side of the axle and not on the input side of the trans like on a camaro/silverado-
ALSO very important--The ABS and traction control systems uses data from the wheel speed sensors at each wheel location
The ABS uses the sensors to keep the tires from SKIDDING during a hard stop
The TC uses the sensors to keep the tires from SPINNING at a hard launch
Tire sizes overall don't matter HOWEVER it is VERY important to never let the tire height differance between the front and rears to be much off more than 1" This is called the "split" example rear height 26" front height 25"-----This is NOT progarable or changable and is permantley set into your ECM /brake contoller and BCM--(the rears always should be taller ) If you deveiate too much both your ABS and TC systems may not work properly or not at all--(hence your codes)
