I got to the modify tune section and got stumped on my tires the factory tires are not a problem, my 40" X13.5 R17 and converting to mm worked out to 1016mm for 40" so i tried to input 999 being the closest three digit input to my size. the programmer gave an error and could not make the correction, after reading a few posts i will try the second method of tire hieght I havent found that portion of the modify tune in my programmer but will look.
anyone else with trucks that read this I would appreciate a hint or tw0 of how you accomplished this.
Predator U???? whipple tune
2002 silverado 8.1L whipple supercharger, 6" lift, sitting on 40's not to shabby with factory tune.........after the diablo tune ONE thing to say OMG shift points hit on the money trucks picks up and screams
If I only had a dealer in town, there are dynos but no dealers maybe close to 500HP at the wheels
