Rear Gear Road America

[Joe Harlan]

Can anyone share what rear gear I might need for Road America 24" tall tire 7500 rpm direct drive gearbox.

 

[Dayle Frame]

RA was the only place I used the 3.7 diff for my Sprite. 7200 in top gear on 20" GY slicks.

Dayle

 

[Bill Blust]

How fast do you want to go? My estimate of a front running competitive speed for the following classes at RA are.......EP..138-140..........FP...124-126 .......HP...118-120

 

[Joe Harlan]

How fast do you want to go? My estimate of a front running competitive speed for the following classes at RA are.......EP..138-140..........FP...124-126 .......HP...118-120

Thanks Bill that's the kind of data I was looking for.

Joe

 

[little bill]

At RA for a top FP car you need gearing to reach 130, at 124/126 you will run out of revs in the draft.