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mechanical tachometer to electric tachometer?

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Old Sep 19, 2003 | 08:49 AM
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Default mechanical tachometer to electric tachometer?

I have a 68 with a distributer driven tach. I noticed in new years GM went to a eletric tachometer. Has anyone changed out theirs? Im thinking of changing to fuel injection (holley cmdr 950) and is requires a HEI distributer, which means I will loose my funtional tachometer unless I convert to electic. Thanks
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Old Sep 19, 2003 | 09:02 AM
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Default Re: mechanical tachometer to electric tachometer? (rparkervette)

I have a 68 with a distributer driven tach. I noticed in new years GM went to a eletric tachometer. Has anyone changed out theirs? Im thinking of changing to fuel injection (holley cmdr 950) and is requires a HEI distributer, which means I will loose my funtional tachometer unless I convert to electic. Thanks
I've done this switch on all my early C3's... It's easy... If you want to keep the stock look, buy a used '75 - '77 tach (electronic). It installs in the same location.. The wiring is easy.. You just need 3 wires hooked up.. One to ground, one to ignition + and one to the tach port of either the tach port on your HEI or MSD box (if you have one)...


[Modified by GrandSportC3, 9:03 AM 9/19/2003]
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Old Sep 19, 2003 | 09:04 AM
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Default Re: mechanical tachometer to electric tachometer? (rparkervette)

68-71 used green numerals, 72-up switched to white. I got the 75-77 electric tach for my 71 and switched the faceplates. That gave me the correct color mumerals with the higher 71 redline and electric movement.
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Old Sep 19, 2003 | 11:36 AM
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Default Re: mechanical tachometer to electric tachometer? (rparkervette)

There are a couple companies that sell HEI's with a tach drive. Kind of pricey. Would be cheaper to change the face with an electronic one.
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Old Sep 19, 2003 | 10:17 PM
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Default Re: mechanical tachometer to electric tachometer? (rparkervette)

Clocks by Roger can convert your mechanical tach to electric, and it will retain its original appearance. We just had our 72's converted. Roger does GOOD work! :cheers:
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