Need an RPM calculator.

[Got Smoke?]

Ok Coon Smile and I are talking about swapping axles out in our 99's. I will be going from 3.55 to 4.10 ratio, and I want to figure out the RPM jump.

I want to be able to punch in the tire size, mph, & overdrive ratio in order to determine my RPM's with 265's(31's) and 285/305(33's)

Thanks,

 

[Turbo Performance]

This what you're after? Link.

 

[haloman]

Horsepower Calculator, calculate hp from et, trap speed, calculate tire diameter, mph and rear end ratio.

 

[mech2161]

http://www.florida4x4.com/tech/gearcalc.php

When it asks if you want to stop running script, click no.