[Healeys] How Fast Does My Drive Shaft Spin??

Mark J Bradakis mark at bradakis.com
Wed Jul 10 15:27:33 MDT 2013


Price Lindsay wrote:
> I am trying to install cruise control in my car and need to know the rate of
> spin of the drive shaft on a BJ8 while in overdrive?  I'm looking for the
> number of revolutions per mile. This is a stock car with stock tires, rear
> end, transmission and over drive.
>

The revolutions of the driveshaft per mile will be the same regardless of
what gear the transmission is in.  There are various tire size calculators
out there, you need to find the revolutions per mile for your size tire, 
then
multiply that by the final drive ratio to get the driveshaft speed.

mjb.


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