We have a 660 HP E85 Katech motor we are going to run top speed, and are looking for gearing advice. You are the man. The stock Z06 tranny has a taller 5th gear than the ZR1 for starters, but we were thinking of changing the rear end to 3.90 or 4.10 to allow 5th gear to run to 225mph.
We have the aero changes in the works, with the weight at 2850.
Any advice would be greatly appreciated.
Jim Hall
Halltech Systems
www.halltechsystems.com
jim@halltechsystems.com