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I went from 4.30 to 4.10 it was about 200 rpm did,t make no diff in the et slip




Its probably important to Note. That similer rpm changes can be had by different tire diameters.


With 3.91,s and a 27.3" tire and swapping to a 26" tire the mathmatical RPM difference is 306 RPM between the two different tire Diameters.

My car was faster with the taller tire and less RPM. Even though the 26" tire had More gear leverage.

Theres a "Sweet spot" with everything, combined in the "Combo"

And Were All never done, looking for them to all match up, mike