Tachometer - Chevelle Tech
Electrical & Wiring Troubleshooting electrical problems.

 
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post #1 of 2 (permalink) Old Sep 20th, 15, 10:52 AM Thread Starter
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Dean
 
Join Date: Oct 2008
Location: Missouri
Posts: 350
Tachometer

My '70 SS396 has a later version GM HEI rather then the points system. My tach does not read accurately. Is there something I need to change? Seems to read higher than it should.
dbuchholtz is offline  
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post #2 of 2 (permalink) Old Sep 20th, 15, 1:01 PM
Senior Tech Team
 
Join Date: Apr 2012
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Re: Tachometer

Yes, google search for "gm tachometer problems with gm hei". Could be you need a very easy to build, low cost filter, or resistor to drop the signal down to the correct level.
Dave Ray is offline  
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