If my tach was electric, that would be fine. Mine is mechanical.
----- Original Message -----
From: David Massey <email@example.com>
To: Jeff McNeal <firstname.lastname@example.org>
Cc: Triumph List <email@example.com>
Sent: Wednesday, March 22, 2000 7:28 AM
Subject: Tachometer calibration anyone?
> Message text written by "Jeff McNeal"
> >Hello again. My Jaeger Tachometer on my '67 Spitfire is miscalibrated
> apparently. An electronic tach confirmed my suspicions that my mechanical
> tach is showing the engine revving a good 500 RPM higher than it actually
> at highway speeds. Has anyone calibrated their own tachometer? How is it
> done? TIA
> I calibrated the tach in my MG once but I don't like to talk about it.
> (Just kidding)
> The electronic tachs have a variable resistor inside that adjusts the span
> and you can have someone hold the engine at a predetermined speed (say
> 3,000) while you adjust the tach to that reading. What could be simpler?