Boone
Automotive Enthusiast
I'm considering a rear gear change in my car, and I'm trying to decide between 3.31 and 3.55. What are the top speeds S197 drivers are seeing at various race tracks? At 7000 rpm in 4th with a 3650 (1:1) and as short a tire as I think I'll ever have (25.5" diameter), 3.31 will top out at 160, and 3.55 will top out at 150. I want the 3.55 to aide corner exit so I can use 3rd gear as much as possible, but I'd like to know if anyone is seeing over 150 mph on track.
I've run HPDE's at two tracks on the east coast. My top recorded speeds are as follows:
110mph CMP
136mph VIR (used 5th and could easily have seen 145 without the shift)
If I do some traveling, am I going to run into problems at tracks that can see 150 mph+? What speeds are out there beyond my 3 hour radius?
I've run HPDE's at two tracks on the east coast. My top recorded speeds are as follows:
110mph CMP
136mph VIR (used 5th and could easily have seen 145 without the shift)
If I do some traveling, am I going to run into problems at tracks that can see 150 mph+? What speeds are out there beyond my 3 hour radius?