Originally Posted by Bigkid
I was at the shop getting an oil change this morning and the guys there were explaining that my beautiful 20" rear wheels had changed the gearing on my car from 3.07 to something like 2.75. Chris said that would affect the launch, 60' and 1/8 mile times fairly drastically.
Absolutely.
Can you tell me what your rear tire specs are? A thinner sidewall would certainly made the OD smaller, yielding an effectively lower gear (or in your case, closer to stock).
Problem is, the thinner the sidewall, the less sidewall flex you have and therefore the easier it is to break traction for a launch. The 20's are killing you, but they sure do look pretty. Even the factory 19's on our cars are torque-stealing boat anchors. There's a reason Les is running 18's all-around...
