ACCURACY: OEM vs. Aftermarket Tach

68COUGAR

Registered User
I think this subject needs a new thread.

If the SC OEM tach. reads 300 - 500 rpm high, then how accurate is an aftermarket tach?

This begs the question how accurate are the Auto Meter or Stewart Warner Tachs?

Years ago I bought a digital tach, accurate to +/- 10 rpm. I bought it because I wanted to know my true speed on the Autobahn. Unfortunately it only worked with a single spark ignition.

68COUGAR
 
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