Calculators

 

Straight From The Team Healey Texas Garages 

An Awsum
Austin-Healey Speed Calculator

A real nifty way to figure out how fast you're really going!

The gauges in a Healey are notoriously unreliable - especially the speedo! Most drivers have learned to average out the wildly swinging needle oscillations. Even more likely, since the bloody gauge is probably broken, most folks just keep a sharp lookout for the cops. Since the tachometer generally works pretty good on Healeys, the following is in interactive calculator specifically set-up to allow you to calculate speeds at different RPMs, taking into account tire sizes, and any gear ratios that you may be running.

Try it out!


Tire
Diameter
(in inches)
Rear Axle
Ratio
Gear
Ratio of gear
selected in
gearbox
Overdrive Ratio
(typically 0, 22, or 28)
RPM
Speed
in MPH