Wondered what the thinking would be on differential ratios per track for a limited prep 1275 HProd Bugeye? Have a 3.9 in the car now for Mid Ohio. What would be suggested for PittRace, Road America, Gingerman or Grattan?
Thanks
EZ
I do a search for trap speeds for those tracks and go from there, using a gear/speed chart.
I only use 2 choices. 123MPH or the next choice up for Daytona . http://www.scirocco.org/gears/
