Rear gear selection for Chevy ll 327 stocker build......

[brent flynn]

Originally Posted by Mike Taylor 3601

MPH X Gear ratio X 336 divided by tire height = RPM.
You'll have to allow for converter slippage someone else could tell you more on that # but probaly 5-8% would be good guess as example figures crossing @ 7100 add 8% would be 7668
Stick car will match formula almost exactly.
Can also figure converter % slippage@ top end w/this formula as close as can for guys without data recorder
Mike Taylor 3601

My car... 122.3x4.11x336 devided by 30''= 5629... i trap at 5800...Id say my converter is locked up pretty good... 3% roughly... This is not my stocker combo... Not sure what to expect from that...