4:10's W/Stock Wheel/Tire RPM's Needed

[mcmmotorsports]

4:10's going in tomorrow and I need some help.

Could someone please tell me what RPM's they are at:
45 MPH in 5th=
60 MPH in 5th=
70 MPH in 5th=

It might be a little while before speed cal or predator arrives and I don't need a ticket, thanks.

 

[Cobra Jay]

Go to Yahoo. Type in Randy's Ring and Pinion. Click on the link. Then click on Calculators. Click on rpm. Scroll down to where it says for specific o.d. ratio. Enter 25.6 for tire height, and .62 for 3650 trans or .68 for T-45 trans, and then mph and ratio. For an auto trans I'm not sure what the o.d. ratio is. This will help keep you out of trouble.

 

[krly79]

Here is a great calculator.


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

45 MPH in 5th= 1,497.2 RPM
60 MPH in 5th= 1,996.3 RPM
70 MPH in 5th= 2,329.0 RPM