KSawyer

Can someone please give me a good starting point for the final drive ratio for a fairly large asphalt track
reedy 8.5 motor

Airwave

iTrader: (1)

sorry which category?

JayL

Will be hard.to find
Nobody runs 8.5 for onroad

Mod is 4.5 or 5.5, everything else gets killed mid range, cars will run you over, literally
Spec is 13.5-25.5

Tom1977

For 8.5T a FDR of 6.5 is a good starting point. Keep an eye on your motor temperature.

riceball777

iTrader: (36)

last time i checked everybody runs a 4.5turn or a 5 turn in mod on road and i have never seen anybody run a 8.5t in an onroad car. 8.5t in really only ran in mod 2wd buggy. people with mod on road touring cars run final drives in the low to mid 7's and 17.5 spec cars run a final drive in the low to mid 4's. So i would say a final drive in the 6's should be fine for a 8.5t motor.