HEI Tach Upgrade Question?
Melting Slicks
Joined: May 2007
Posts: 3,246
Likes: 4
From: Bay Area CA
No, stock would have the mesh covered wire going to the starter as you saw, but the main tach power wire would go to the large connector under the brake booster, as stock. Trace the orange wire out to it's end, and see how it's powered/where it goes. if you just want to run your own wire, you can tap in to the main fuse panel under the drivers dash with a female lug and a 12 gauge wire and hook it to the IGN tab. Other end to the Batt tab on the Tach. There should be a plugged hole just above the fuse panel. C.
Drifting
Joined: Jul 2008
Posts: 1,483
Likes: 459
From: Lititz PA
I just had my '73 tach converted to electronic($240) and kept the stock face. I also had my oil pressure gage converted too. Here's the guy to talk to:
Corvette Instrument Service
Roger Scott
9627 Begonia St.
Palm Beach Gardens, FL 33410
561-627-9345 (weekdays 9-5 only please)
Good luck,
John
Corvette Instrument Service
Roger Scott
9627 Begonia St.
Palm Beach Gardens, FL 33410
561-627-9345 (weekdays 9-5 only please)
Good luck,
John
Instructor
Joined: Feb 2014
Posts: 161
Likes: 26
From: Prague
Do I understand correctly that there are three ways how to run a new HEI distributor with a tach on my 69 Vette.
1) replace manual tach for 75 tach
2) convert original manual tach to electronic
3) install tach filter?
4) other options?
1) replace manual tach for 75 tach
2) convert original manual tach to electronic
3) install tach filter?
4) other options?
Burning Brakes
Joined: Dec 2003
Posts: 1,004
Likes: 7
From: Adelaide South Australia
buy an HEI mechanical tach drive distributor. (From $60~150 on eBay)
No need to change your tachometer.
Le Mans Master
Joined: May 2007
Posts: 5,025
Likes: 1,120
From: North tonawanda NY
I also went with an HEI mechanical tack drive for my 74.... time will tell if I made a mistake I guess...
Melting Slicks
Joined: Mar 2007
Posts: 2,520
Likes: 11
From: Hinckley OH
The tach filter will not make the tach run. It is installed in-line with the electronic tach to clean up the signal.
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