My old pump gas Duster ran within 1/10 second using ratio from 3.55, 3.73,3.91, 4.10 and finally 4.30.
Traction and fuel supply will determine how much your car and motor like or don't like that ratio change.
Your deal is 4.7 % ratio change so it may not change your results at the track at all shruggy What RPM are you shifting at now? BB or SB motor?

Last edited by Cab_Burge; 03/21/20 12:28 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)