Inliners International Forums General Discussion Hi Performance Clifford vs Offenhauser rehashed, 292 4 Bbl

Wow a formula that I know! 336x mphx axle ratio /tire diameter. In this case 70 x336 x3.55/28.3=2950.3. This is with the 600-16 tire from another post. I hope this helps with finding the RPM range. Jay6155