HEI plug wire question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

franko72 · 03-13-2005, 12:26 PM

I am going to install a HEI Dist. soon. I currently have after market plug wires.
They are hi temp. Radio suppresion 8 MM wires. Will they be compatible with the HEI dist.? Where do I hook up the fact. tach to the HEI Dist.?

**53burb** · 03-13-2005, 01:13 PM

The plug wires won't work. You need wires specifically for an HEI. The ones most people seem to use are ones from a 74-75 Corvette. Those were for use with an HEI distributor and Rams Horn Manifolds if that is what you have. On the HEI cap, on the drivers side, there are two plugs for the power and tach and they are labeled on the cap.

lngbed71 · 03-13-2005, 01:48 PM

Isn't the factory tach gear driven?

jhow66 · 03-13-2005, 02:29 PM

Quote:

Originally Posted by lngbed71

Isn't the factory tach gear driven?

No --two wire hookup--one to tach-one to switched power.

franko72 · 03-13-2005, 02:56 PM

no the fact. tach isnt gear driven.How does it connect to the HEI Dist.The existing coil has a brown and a yellow wire attached to it. Do I connect one of these to the HEI Dist?I know that I need to run a power wire from the ign. unfused section of the fuse box to the dist. I have a 402 BB , which plug wire application will work for a 402.

dwaite72lnghrn · 03-13-2005, 04:10 PM

The yellow wire will be cut and taped off. The brown wire if it was run for the tach will be moved to the Tach connector on the new HEI. You will need 1/4" female spade quick disconnect connectors, 2 for the new power lead (normally Yellow for 10-12guage) 1 inside on fuse block and 1 outside to the HEI, and 1 female quick disconnect spade connector 1/4" (normally blue for 18-20 gauge wire) which will connect to your brown tach wire connector.

franko72 · 03-13-2005, 10:16 PM

thanks for the scoop.

03-13-2005, 12:26 PM	#1
franko72 Franko72 Join Date: May 2004 Location: Cincinnati,Ohio Posts: 471	HEI plug wire question I am going to install a HEI Dist. soon. I currently have after market plug wires. They are hi temp. Radio suppresion 8 MM wires. Will they be compatible with the HEI dist.? Where do I hook up the fact. tach to the HEI Dist.? __________________ 1972 C20 cheyenne Super 402 BB/400 turbo LWB A/C Tilt, Cruise Control, Saddle tanks, Tach My Home Page Better to burn out than it is to rust

03-13-2005, 02:56 PM	#5
franko72 Franko72 Join Date: May 2004 Location: Cincinnati,Ohio Posts: 471	no the fact. tach isnt gear driven.How does it connect to the HEI Dist.The existing coil has a brown and a yellow wire attached to it. Do I connect one of these to the HEI Dist?I know that I need to run a power wire from the ign. unfused section of the fuse box to the dist. I have a 402 BB , which plug wire application will work for a 402. __________________ 1972 C20 cheyenne Super 402 BB/400 turbo LWB A/C Tilt, Cruise Control, Saddle tanks, Tach My Home Page Better to burn out than it is to rust

03-13-2005, 04:10 PM	#6
dwaite72lnghrn Registered User Join Date: Jun 2002 Location: central pa Posts: 1,525	The yellow wire will be cut and taped off. The brown wire if it was run for the tach will be moved to the Tach connector on the new HEI. You will need 1/4" female spade quick disconnect connectors, 2 for the new power lead (normally Yellow for 10-12guage) 1 inside on fuse block and 1 outside to the HEI, and 1 female quick disconnect spade connector 1/4" (normally blue for 18-20 gauge wire) which will connect to your brown tach wire connector. __________________ 72 longhorn c30 502BB/th400/fact air/4.11rear/ custom camper 72 bug(the better half's) under reconstruction 2009 HHR aqua blue 71 GMC k20 350/sm465 2009 Chevy hd3500 6.6 Victory Red crew cab dually Dave & Jeanne

03-13-2005, 10:16 PM	#7
franko72 Franko72 Join Date: May 2004 Location: Cincinnati,Ohio Posts: 471	thanks for the scoop. __________________ 1972 C20 cheyenne Super 402 BB/400 turbo LWB A/C Tilt, Cruise Control, Saddle tanks, Tach My Home Page Better to burn out than it is to rust

03-13-2005, 01:13 PM	#2
53burb Senior Member Join Date: May 2004 Location: Queen Creek, AZ Posts: 1,010	The plug wires won't work. You need wires specifically for an HEI. The ones most people seem to use are ones from a 74-75 Corvette. Those were for use with an HEI distributor and Rams Horn Manifolds if that is what you have. On the HEI cap, on the drivers side, there are two plugs for the power and tach and they are labeled on the cap.

03-13-2005, 01:48 PM	#3
lngbed71 Nothing fits but the oil Join Date: Mar 2003 Location: Gaston, Indiana Posts: 424	Isn't the factory tach gear driven?



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