Tachometer.... mechanical to electronic?
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From: Paducah KY
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St. Jude Donor '03
Tachometer.... mechanical to electronic?
I am in the process of installing a fuel injection system on my 502. In order to get sequential injection, I have to change out to a dual sync distributor. I'm tired of chasing parts to keep the mechanical drive original tach so I was wondering whatelse I would need to put a '75 or '76 electronic tach in my dash.
Any help appreciated.
Dave
Any help appreciated.
Dave
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From: Orange Park Florida
Re: Tachometer.... mechanical to electronic? (Rolling Thunder)
Yes, Roger is a good source, or you could go get a stock tach from 75-77, and it would work...assuming it's good that is....need that infamous tach filter also, but you can make one....
GENE
GENE
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Re: Tachometer.... mechanical to electronic? (mrvette)
I have a 75-77 electric tach in my 71. Works great. I moved my 71 faceplate over to get the green 71 numerals + correct redline.
I got mine from Gruhala. He also tests them before shipping.
I got mine from Gruhala. He also tests them before shipping.
Burning Brakes
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From: Beaverton, OR
Re: Tachometer.... mechanical to electronic? (Todbo)
there's a company in Jackson , tn (clock's by roger) that will convert your tach to electronic
Todd
Todd
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From: Orange Park Florida
Re: Tachometer.... mechanical to electronic? (dath)
Suggestion, find yourself a vette shop in your area that may trade you a good tach for your old original distributor....that way you out no cash....
GENE
GENE
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St. Jude Donor '03
Re: Tachometer.... mechanical to electronic? (mrvette)
Thanks guys, I sent an email to Gruhala to see what he has. The face change that Markus mentioned sounds like the way to go. :cheers:
Dave
Dave
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replacement tachs....
I was informed that the following are OER parts numbers for replacement corvette tachometers. I haven't been able to confirm this since the oerparts.com website doesn't have any info which I can access.
If someone can verify/confirm these it would probably be valuable to those C3 folks who wish to install an electronic tach.
6695350a 5300 redline
6468711a 5500 redline
6469057a 6000 redline
6468712a 6500 redline
If someone can verify/confirm these it would probably be valuable to those C3 folks who wish to install an electronic tach.
6695350a 5300 redline
6468711a 5500 redline
6469057a 6000 redline
6468712a 6500 redline
Instructor
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From: Bellevue WA
Re: Tachometer.... mechanical to electronic? (Rolling Thunder)
I did exactly what Zwede did - installed a '76 with my old faceplate. However, I had a problem because I have an MSD-6a ingnition. If you use an MSD box, DO NOT simply connect their "Tach" terminal to your GM electronic tach. MSD makes an adapter that you have to use. It's on their website. Turns out I blew the brains out of the tach circuit board and had to replace it. Works fine now (with the MSD adapter).
Race Director
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From: Plano TX
Re: Tachometer.... mechanical to electronic? (LT-1 Larry)
I did exactly what Zwede did - installed a '76 with my old faceplate. However, I had a problem because I have an MSD-6a ingnition. If you use an MSD box, DO NOT simply connect their "Tach" terminal to your GM electronic tach. MSD makes an adapter that you have to use. It's on their website. Turns out I blew the brains out of the tach circuit board and had to replace it. Works fine now (with the MSD adapter).
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From: Plano TX
Re: Tachometer.... mechanical to electronic? (Bob Turner)
Zwede,
Would you be interested in building one of these electric tachs for me for a price?
Bob :cheers:
Would you be interested in building one of these electric tachs for me for a price?
Bob :cheers:
Tach----- resistor ----------coil
.........|
.........|
....... Cap
.........|
......Ground
Ignore dots. Just there to avoid the forum messing up the formatting.
Edit: I'm assuming you were referring to the tach filter, not electric tachs?
[Modified by zwede, 4:50 PM 8/13/2003]
Thread Starter
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Re: Tachometer.... mechanical to electronic? (zwede)
Sounds like you might have a business opportunity here Zwede. I talked to Gary G. on the phone today and he questioned the tach face change. When I told him you had done it, he said, "If Markus says it'll work, it'll work!" Then he laughed and hinted that I might ought to get it and send it to you to have it changed. I took that to either be a compliment to you or a lack of confidence in my ability. On further consideration I decided it was both. :lol:
Dave
:cheers:
Dave
:cheers:
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From: Plano TX
Re: Tachometer.... mechanical to electronic? (Rolling Thunder)
Garys a good guy. He was complaining about having to find a running car to test the used tachs so I built him a tach tester box. Traded it to him for some parts.
As for the face plate change, the only issue I had was that the 71 faceplate used tiny rivets, and the 75-77 was screw on. The holes almost, but not quite, line up between the two. I had to elongate the faceplate holes to make it fit. Once installed in the car you can't tell.
As for the face plate change, the only issue I had was that the 71 faceplate used tiny rivets, and the 75-77 was screw on. The holes almost, but not quite, line up between the two. I had to elongate the faceplate holes to make it fit. Once installed in the car you can't tell.
Melting Slicks
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From: Springfield MA
Re: Tachometer.... mechanical to electronic? (zwede)
I also bought a 76 tach from a CF member. I installed it without a tach filter (MSD told me that I didn't need one for a stock L98 setup)
I guess that if I blow the board, they were wrong. :)
I can't tell you how well it works yet because I still can't get the frickin' car running. :(
I guess that if I blow the board, they were wrong. :)
I can't tell you how well it works yet because I still can't get the frickin' car running. :(
