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06-03-2013, 09:29 PM
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#1 |
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Recalculating.....
Join Date: Nov 2010
Location: New Lenox Il
Posts: 686
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Tach advice
So Im adding an original tach to my truck and have a few questions.
1 Im getting the HEI harness from Classic Parts which dimple do I drill out on the firewall to run the wire through? A pic would be great! 2 I want to test the tach before I put it in do I just run a wire to the tach lead on the HEI distributor to the tach and then the other terminal on the tach to 12V? 3 Do I have to do anything different because Im using HEI? Thanks in advance.
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Brian - (BBrendal) 1969 Chevy Camaro Z28 1972 Chevy Blazer CST 2004 GMC Yukon (The truck that pulls the car trailer) 1972 Chevy Blazer CST #2 (Finished and sold!) Blazer build link... http://s1213.photobucket.com/albums/...rendal/Blazer/ |
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06-03-2013, 09:40 PM
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#2 |
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Account Suspended
Join Date: Oct 2012
Location: Salt Lake City, Utah
Posts: 3,331
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Re: Tach advice
It's really pretty straight forward, especially where you have HEI. I just picked a hole. Not sure if there is a correct one. Don't see any reason why you couldn't test it like you mentioned. Here's my tach installation thread, that should give you a couple pointers
http://67-72chevytrucks.com/vboard/s...ght=Found+tach Posted via Mobile Device |
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06-03-2013, 11:40 PM
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#3 |
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Senior Member
 
Join Date: May 2010
Location: Wisconsin & Arizona
Posts: 4,847
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Re: Tach advice
Try this link... http://67-72chevytrucks.com/vboard/s...d.php?t=439292
I used a Rotabroach to cut the hole. Better than a hole saw and WAY better than a drill. http://www.ebay.com/itm/Blair-Rotabr...ht_2157wt_1043 |
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06-04-2013, 12:57 AM
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#4 |
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Moderator
 
Join Date: May 2007
Location: Southern Cal
Posts: 20,019
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Re: Tach advice
Make sure it's grounded before you test it, otherwise it will fry.
Posted via Mobile Device
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1972 C/10 Cheyenne Super SWB. Restored, loaded, slammed. 1968 C/10 50th Anniversary LWB. Unrestored, stock, daily driver/work truck. RIP ElJay RIP 67ChevyRedneck RIP Grumpy Old Man RIP FleetsidePaul |
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