Tach install - does it matter - Team Camaro Tech
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post #1 of 10 (permalink) Old Oct 17th, 07, 08:18 AM Thread Starter
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Tach install - does it matter

I am in the process of installing a dash tach where my fuel guage once was. My question is does it matter if the tach is a 7000 rpm or a 8000 rpm tach?
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post #2 of 10 (permalink) Old Oct 17th, 07, 09:23 AM
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Re: Tach install - does it matter

If your asking if either will work, the answer is yes.
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post #3 of 10 (permalink) Old Oct 17th, 07, 09:26 AM Thread Starter
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Re: Tach install - does it matter

Does it matter whether you have a auto or a manual tranny? Certain gear ratios, anything?
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post #4 of 10 (permalink) Old Oct 17th, 07, 09:45 AM
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Re: Tach install - does it matter

No, no, and no. Tachometer is ignition triggered with ignition switched power.

Tach could care less whether a 6.13 or 2.41 rear gear with either an auto or manual trans installed and turning anything from 12 inch to 97 inch outside diameter tire.

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post #5 of 10 (permalink) Old Oct 17th, 07, 10:56 AM Thread Starter
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Re: Tach install - does it matter

I didn't think so, but I had seen a comment and didn't want any surprises. Thanks.
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post #6 of 10 (permalink) Old Oct 17th, 07, 11:20 AM
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Re: Tach install - does it matter

Quote:
Originally Posted by tgifford5 View Post
I didn't think so, but I had seen a comment and didn't want any surprises. Thanks.
Ted, out of curiosity, are you going to take your dash out to do it? A few months ago I did the same gauge swap, and I chose to do it from the front without taking out the dash. IMO, it's the easiest way to do it. Just an idea.

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post #7 of 10 (permalink) Old Oct 17th, 07, 12:38 PM Thread Starter
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Re: Tach install - does it matter

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Originally Posted by dbx1969 View Post
Ted, out of curiosity, are you going to take your dash out to do it? A few months ago I did the same gauge swap, and I chose to do it from the front without taking out the dash. IMO, it's the easiest way to do it. Just an idea.
I am not planning on taking out the dash carrier. I have the template sized according to the measurements shown but the diameter of the circle does not allow the template to fit back into the pocket part of the carrier. Do I need to down size my template or just trim my template so that my old fuel guage holes line up? This is where I'm at right know. I just don't want to mess up the alignment. I figure the most important part is to get the mounting holes correct. The size of the tach hole shouldn't really matter, no one will see it.
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post #8 of 10 (permalink) Old Oct 17th, 07, 01:03 PM
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Re: Tach install - does it matter

Quote:
Originally Posted by tgifford5 View Post
..... just trim my template so that my old fuel guage holes line up?
Yes, exactly! My template was a little large, too, but it was only the circumference of the circle, not the 3 marks for the bolts or the tach cut out.


Quote:
Originally Posted by tgiford5
I figure the most important part is to get the mounting holes correct. The size of the tach hole shouldn't really matter, no one will see it.
You've got it! Good luck.

Learning & Relearning about the cars I grew up with.
69' - Built 350, 750 Holley, Elgin E920P Cam, 283 PP Heads, Long Comp Headers, MSD, TKO-600, 12 Bolt Posi 3.73, Hotchkis Rear, Eibach Front w/Hotchkis Sway, SPC UCAs, 3rd Gen PS, AR TTII's. Still working on it.
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post #9 of 10 (permalink) Old Oct 17th, 07, 01:17 PM Thread Starter
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Re: Tach install - does it matter

Quote:
Originally Posted by dbx1969 View Post
Yes, exactly! My template was a little large, too, but it was only the circumference of the circle, not the 3 marks for the bolts or the tach cut out.




You've got it! Good luck.
Thanks, just wanted to verify what I was thinking.
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post #10 of 10 (permalink) Old Oct 17th, 07, 01:47 PM
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Re: Tach install - does it matter

Quote:
Originally Posted by tgifford5 View Post
Thanks, just wanted to verify what I was thinking.
But...I guess it's all relative, depending on where you got the template. All you have to do to verify is hold the cutout up to the back of the tach and see if the bolts line up on the holes. As long as those line up, you're good to go. This is the ONE project that I managed to pull off without any snags, lol. As soon as I hooked up the tach to the MSD....worked like a champ.

Learning & Relearning about the cars I grew up with.
69' - Built 350, 750 Holley, Elgin E920P Cam, 283 PP Heads, Long Comp Headers, MSD, TKO-600, 12 Bolt Posi 3.73, Hotchkis Rear, Eibach Front w/Hotchkis Sway, SPC UCAs, 3rd Gen PS, AR TTII's. Still working on it.
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