Alternator lead for tach? – Diesel Place : Chevrolet and GMC Diesel Truck Forums

Ir you want RPM for jsut troubleshooting or occassional reference, don’t spend the money on any tachometer systems. If you have a laptop or Pocket PC like a Dell or HP handheld, you can download a free program called RPM from sound. http://tunelab-world.com/rpmsound.html It works on any internal combustion engine and is accurate to about 1 rpm. I have used it on a light plane to check the accuracy of the mechanical tach. Works great.

Source: Alternator lead for tach? – Diesel Place : Chevrolet and GMC Diesel Truck Forums

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