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#1 |
Registered User
Join Date: Feb 2007
Location: Acton
Posts: 158
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Tach Filter
The tach filter wires are a much smaller wire than the actual harness for the tach. If i put the filter in line will that pose a problem as the smaller wires may heat too much? Does the tach harness get that much electrical current through it to make those smaller wires on the tach filter heat??
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1967 C10 Long Bed, Soon to have a 350 1997 Chevy 2500 454 BB |
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#2 |
Registered User
Join Date: Feb 2007
Location: Acton
Posts: 158
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Re: Tach Filter
Anybody have any advice
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1967 C10 Long Bed, Soon to have a 350 1997 Chevy 2500 454 BB |
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#3 |
member #16
![]() Join Date: Dec 1999
Location: Yuba City Ca.
Posts: 3,618
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Re: Tach Filter
What kind of tach.? I have a aftermarket factory type that woks good and does not use a filter. Also have HEI dist.
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john http://67-72chevytrucks.com/vboard/showgroups.php board vendors ![]() http://www.flickr.com/photos/1745471...7602865984234/ |
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#4 |
Registered User
Join Date: Feb 2007
Location: Acton
Posts: 158
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Re: Tach Filter
It's a repro of the original. They say on the website you need a filter with hei
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1967 C10 Long Bed, Soon to have a 350 1997 Chevy 2500 454 BB |
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#5 |
Registered User
Join Date: Nov 2009
Location: Sherman, ME
Posts: 2,359
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Re: Tach Filter
On the original GM tachs, the filter was only used to prevent interference with the radio. I've hooked original tachs up to HEI distributors without a filter and haven't had any problems. But if the manufacturer of the reproduction tach says to use a filter it would definitely be a good idea.
There is very little current flowing through the tach signal wire. So the smaller gauge wire on the filter shouldn't be a problem at all. I fact, the only reason I can think of for GM to have used such a heavy gauge wire on the factory tach harness was for durability. Even the +12V power wire is oversized for the amount of current drawn by the tach. |
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