Electronic Tach questions.
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Electronic Tach questions.
Two questions:
1) Will after-market electronic tachs for 1975s (such as those found at Zip) fit without modification in the space for a 1972 mechanical tach?
2) Will a Holley sniper feed the proper signal to those after-market electronic tachs?
My 1972 has a mechanical tach. I want to install a Holley Hyperspark distributor and ignition setup. I have a Holley Sniper currently installed.
Thanks in advance
1) Will after-market electronic tachs for 1975s (such as those found at Zip) fit without modification in the space for a 1972 mechanical tach?
2) Will a Holley sniper feed the proper signal to those after-market electronic tachs?
My 1972 has a mechanical tach. I want to install a Holley Hyperspark distributor and ignition setup. I have a Holley Sniper currently installed.
Thanks in advance
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Several Corvette specialty vendors (such as Zip) carry a complete tach for the 1975. That tach is electronic and not mechanical. I have read that it may fit without modification in a 1972.
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Joined: Jul 2004
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From: Scottsdale Arizona
Got it. Have a look at this. Eliminates concerns about fit. I don’t know about compatibility with your ignition but it works fine with MSD ignitions.
https://willcoxcorvette.com/corvette...-kit-1955-1974
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Wanted to bring up this question again, as I want to install the Holley Hyperspark which will replace my HEI with mechanical tach output.
Both of these are from Zip. The first one is an electronic tach made for the 1975. The second one is an electronic tach made to retrofit into a 1972. So again, will the 1975 tach fit without modification into the 1972? If so, would there be any advantage in getting the retro fit version which is about 100 dollars more?
https://www.zip-corvette.com/75-77-l...0-redline.html
https://www.zip-corvette.com/72-74-5...lectronic.html
Both of these are from Zip. The first one is an electronic tach made for the 1975. The second one is an electronic tach made to retrofit into a 1972. So again, will the 1975 tach fit without modification into the 1972? If so, would there be any advantage in getting the retro fit version which is about 100 dollars more?
https://www.zip-corvette.com/75-77-l...0-redline.html
https://www.zip-corvette.com/72-74-5...lectronic.html
Dr. Detroit
Joined: Mar 2012
Posts: 10,095
Likes: 4,025
From: New Braunfels Texas
Wanted to bring up this question again, as I want to install the Holley Hyperspark which will replace my HEI with mechanical tach output.
Both of these are from Zip. The first one is an electronic tach made for the 1975. The second one is an electronic tach made to retrofit into a 1972. So again, will the 1975 tach fit without modification into the 1972? If so, would there be any advantage in getting the retro fit version which is about 100 dollars more?
https://www.zip-corvette.com/75-77-l...0-redline.html
https://www.zip-corvette.com/72-74-5...lectronic.html
Both of these are from Zip. The first one is an electronic tach made for the 1975. The second one is an electronic tach made to retrofit into a 1972. So again, will the 1975 tach fit without modification into the 1972? If so, would there be any advantage in getting the retro fit version which is about 100 dollars more?
https://www.zip-corvette.com/75-77-l...0-redline.html
https://www.zip-corvette.com/72-74-5...lectronic.html
You just need a signal from the distributor.......any signal.
I have the 72' kit in my 72' and it gets the signal from the MSD box......works perfect.
Jebby
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Joined: Apr 2011
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From: North of Toronto - Ontario
For what it's worth, the face of the 75 gauge is different than the 72, the font on the 72 is "skinny" and more square on the 75 so it'll look different than the speedometer.
Either buy the conversion for your tach or spend the extra $100 and buy an electronic 72 tach from Willcox or whoever
M
Either buy the conversion for your tach or spend the extra $100 and buy an electronic 72 tach from Willcox or whoever
M
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I am still playing with some ideas. Nothing set in stone yet.
Last edited by ivanh3; Sep 24, 2019 at 10:59 AM.
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Dr. Detroit
Joined: Mar 2012
Posts: 10,095
Likes: 4,025
From: New Braunfels Texas
Then your tach is either an electronic tach or a mechanical tach that has been converted, which is still basically an electronic tach of sorts. My current tach has not way to receive an electronic tach signal without modification or replacement. I am considering the 75 because I have heard it's a drop in that requires no modification other than wiring it for power and running a wire for electronic signal.
I am still playing with some ideas. Nothing set in stone yet.
I am still playing with some ideas. Nothing set in stone yet.
Just buy the kit from Zip’s....it is what I have....it was easy. It is a conversion....sick of cable drive tachs.
You would have to change the face as mentioned so in my eyes....using a 75’ tach is not worth it.
Jebby