Quote:
Originally Posted by D14
If he switched to the S15 ring and pinion it would drop his final drive to 3.692
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S15 ring bolts are 13mm while S13 and S14 ring bolts are 12mm. If you want to use an S15 ring inside an S13 or S14 diff you will have to drill out the holes on the diff to 13mm, or use some sort of centering washer.
All of your talk about top speed in 4th and 5th is great, but we don't know what his torque curve looks like. It's meaningless to talk about this without a torque curve.