Factory Tach - Team Camaro Tech
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post #1 of 9 (permalink) Old Jun 8th, 10, 04:52 PM Thread Starter
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Factory Tach

I have a factory tach dash in my 67 camaro. my question is how can I get this working with an HEI ignition? is there a different harness I need to buy?


Thanks
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post #2 of 9 (permalink) Old Jun 8th, 10, 05:25 PM
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Wink Re: Factory Tach

You really should try a "search"

https://www.camaros.net/forums/showth...&highlight=HEI

https://www.camaros.net/forums/showth...&highlight=HEI

https://www.camaros.net/forums/showthread.php?t=158264

http://www.jimragtop.com/tc/tachfilter/

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post #3 of 9 (permalink) Old Jun 8th, 10, 10:28 PM
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Re: Factory Tach

my harness is one for factory gauges.i had a brown wire that went to the coil for the tach.i put a female spade end on it & ran it up to my hei cap & hooked it to the tach terminal on cap.i have a factory aftermarket oer tach & its right with my timming light tach readings.
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post #4 of 9 (permalink) Old Jun 9th, 10, 06:43 AM Thread Starter
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Re: Factory Tach

Quote:
Originally Posted by anthony hisle View Post
my harness is one for factory gauges.i had a brown wire that went to the coil for the tach.i put a female spade end on it & ran it up to my hei cap & hooked it to the tach terminal on cap.i have a factory aftermarket oer tach & its right with my timming light tach readings.

I will have to see if I can find any extra wires up in my dash


Thanks
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post #5 of 9 (permalink) Old Jun 9th, 10, 06:44 AM Thread Starter
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post #6 of 9 (permalink) Old Jun 12th, 10, 04:35 PM
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Re: Factory Tach

If your car came w/ the factory gauges and tach, you won't find any "extra" wires. The brown wire is in a harness. It runs from the multi wire plug in the back of the instrument cluster to the fuse block. In the engine bay, the brown wire runs in a harness from the fuse block over to the coil.


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post #7 of 9 (permalink) Old Jun 13th, 10, 08:39 PM Thread Starter
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Re: Factory Tach

Quote:
Originally Posted by flyingskibiker View Post
If your car came w/ the factory gauges and tach, you won't find any "extra" wires. The brown wire is in a harness. It runs from the multi wire plug in the back of the instrument cluster to the fuse block. In the engine bay, the brown wire runs in a harness from the fuse block over to the coil.

Thanks I will look and see if I can find that wire. My car did not come with a factory tach. What is the wire on the back of the tach for??
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post #8 of 9 (permalink) Old Jun 13th, 10, 08:50 PM
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Re: Factory Tach

On '68s, the wire powers the clock. The tach gets it's signal from the harness and through the circuit board. '67s are pretty much the same thing...


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post #9 of 9 (permalink) Old Jun 13th, 10, 08:53 PM Thread Starter
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Re: Factory Tach

Yeah its a 67, I thought maybe it was a power wire? It must be a ground wire then.
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