HEI Distributer Conversion Wiring - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Roberty · 04-13-2003, 01:35 AM

I just put an HEI distributer in my grandfathers old '70 Chevy pickup that I own and was wondering what is the best (Simplest) way to wire it in correctly to the ignition switch. I think I read somewhere before that the stock wire isn't a heavy enough gage wire and a new one would need to ran. I temporarily ran a hot from the battery to make sure it would run with the new distributer. Now I want to wire it up correctly. Any help, link or a simple schematic would be appreciated.
Thanks, Roberty

Longhorn Man · 04-13-2003, 01:45 AM

You are right on the stock wires, clip them out, including the yellow one going to the starter.
Just run a wire to the IGN UNFUSED terminal on the fuse box.

Blue Beard · 04-13-2003, 10:04 AM

Where can it safely be wiring if the fuse block is full?

Longhorn Man · 04-13-2003, 10:08 AM

In reality, I like to splice into the large pink wire behind the ignition switch. (that's how I have done 2 out of 3 of my trucks). However, I got flamed on here for sayig that last time.
You can also splice the old coil wire real close to the fire wall where the harness comes out, it is not reduced voltage there...but that looks like poo-poo.

Blue Beard · 04-13-2003, 10:23 AM

What is the large pink wire hook too?

Roberty · 04-13-2003, 10:33 AM

Quote:

Originally posted by longhornmail
You are right on the stock wires, clip them out, including the yellow one going to the starter.
Just run a wire to the IGN UNFUSED terminal on the fuse box.

Ok, I'm still a little confused, Longhornman. I need to run a wire from the IGN Unfused terminal to the distributer - Correct?
What do I need to do to the yellow one going to the starter? From where do I need to run the starter wire from?

Roberty

Longhorn Man · 04-13-2003, 10:44 AM

Mr Beard, that wire basicly feeds everything that is controlled from the ignition switch.
Rob, The old points set up was wired 2 ways, the cloth covered reduced voltage wire ran the coil while the engine was running. The yellow wire going to your starter is only hot when you are cranking the engine over. This yellow wire sends a full 12 volts to the coil while cranking the engine over to help with a hotter spark, there for giving quicker start ups.
The HEI makes more power than the old points ever did (in stock form) and does not theed the yellow "boost" wire to assist in anything. The starter only needs the large battery cable, and the purple wire on the S terminal in order to operate.

Quote:

I need to run a wire from the IGN Unfused terminal to the distributer

You got it.

Bill72BB · 04-13-2003, 11:10 AM

I'M using the UN_FUSED contact that Andy talked about for my HEI and Electric choke ,used 12 gauge wire and placed a 5 amp fuse in line . Works great .

baggedblaz · 04-13-2003, 01:58 PM

you can pull a factory HEI power wire out of a truck or car that has the correct connector and replace the existing wire in the harness end to end not cutting a thing just plug and play per say
the terminal at the firewall can be swapped pretty easy ? kinda hard to explain if you arent familiar with the connectors and how they come apart??
i've done this to alot of my trucks and friends as well.looks and works great!

72MARIO · 04-13-2003, 02:17 PM

Longhorn.

They way you described will work. I want to make you aware of the fact that if you remove the old resistor wire and run the correct gauge wire required for the HEI (I forget the gauge 12 sounds right) from where the Old resistor wire plug in you will have the required 12 volts. Just another way Kinda a clean stock looking conversion.

This post Love Tip not a I want to piss you off Post.

Mario

Roberty · 04-13-2003, 06:11 PM

Whew - Thanks for all the responses on the HEI conversion guys!! I really appreciate it.

Roberty

Longhorn Man · 04-13-2003, 07:49 PM

72MARIO, i have never seen anyone pull wires out of the block, only bulky crimp on fittings there, thats what I was saying looked like poo-poo.
You ain't tickin me off. If I'm wrong or don't know the whole story, speak up. I've been called Obie one truck-nobie on here, but I learned 75% of my truck knowledge on these pages. I just remember what all y'all say and repeat it.

04-13-2003, 01:35 AM	#1
Roberty Hot Damn - Here I Am!! Join Date: Feb 2000 Location: Ringgold, Georgia Posts: 726	HEI Distributer Conversion Wiring I just put an HEI distributer in my grandfathers old '70 Chevy pickup that I own and was wondering what is the best (Simplest) way to wire it in correctly to the ignition switch. I think I read somewhere before that the stock wire isn't a heavy enough gage wire and a new one would need to ran. I temporarily ran a hot from the battery to make sure it would run with the new distributer. Now I want to wire it up correctly. Any help, link or a simple schematic would be appreciated. Thanks, Roberty __________________ My vehicles: '90 Silverado Sport '71 Chevelle SS Convertible '70 C-10 - My Grandfather bought it new - original un-restored

04-13-2003, 10:04 AM	#3
Blue Beard Registered User Join Date: Jan 2003 Location: Washington State Posts: 8,834	Where can it safely be wiring if the fuse block is full? __________________ 1970 Chev CST 2003 Harley Fatboy 1975 Chevrolet Step Van 1956 Chev Bel Air 1977 Blazer 2WD For Sale $3000.00 1978 Blazer 2WD For Sale $7000.00 1978 Silverado 2005 Monte Carlo

04-13-2003, 10:23 AM	#5
Blue Beard Registered User Join Date: Jan 2003 Location: Washington State Posts: 8,834	What is the large pink wire hook too? __________________ 1970 Chev CST 2003 Harley Fatboy 1975 Chevrolet Step Van 1956 Chev Bel Air 1977 Blazer 2WD For Sale $3000.00 1978 Blazer 2WD For Sale $7000.00 1978 Silverado 2005 Monte Carlo

04-13-2003, 11:10 AM	#8
Bill72BB Thats the Hillbilly way Join Date: Jul 2001 Location: Torrance,Ca Posts: 5,980	I'M using the UN_FUSED contact that Andy talked about for my HEI and Electric choke ,used 12 gauge wire and placed a 5 amp fuse in line . Works great . __________________ BILL Torrance Calif 90504 Member DUF Club Member Old Farts Club 72 3/4ton Custom Camper BB402/400 trans Dynomax Cerama-coat headers , Hei distributor ,Edelbrock 1411 air,ps,pb,leafsprings ,98 chevy 60/40 seat,S10 shoulder belts tilt,3.54 Dana 60 rear. 16" Eagle wheels with LT265/75 16 tires,Gaylord Lid,H4 headlights with 100W relay conversion. " If I knew I was going to live this long I would have taken better care of myself " Marriage changes passion...suddenly you're in bed with a relative. A GUY'S PRAYER.... Lord, I pray for a nympho with huge boobs who owns a liquor store and likes to fish and hunt and has a Harley .Amen ,

04-13-2003, 01:58 PM	#9
baggedblaz Registered User Join Date: Jan 2002 Location: Layton,Ut Posts: 196	you can pull a factory HEI power wire out of a truck or car that has the correct connector and replace the existing wire in the harness end to end not cutting a thing just plug and play per say the terminal at the firewall can be swapped pretty easy ? kinda hard to explain if you arent familiar with the connectors and how they come apart?? i've done this to alot of my trucks and friends as well.looks and works great! __________________ '82 chev swb 4dr 2wd project '72 2wd blazer LT1/4L60E "SURFSIN" bagged 20's '71 2wd blazer '95 chev 2wd Xcab swb

04-13-2003, 01:45 AM	#2
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	You are right on the stock wires, clip them out, including the yellow one going to the starter. Just run a wire to the IGN UNFUSED terminal on the fuse box.

04-13-2003, 10:08 AM	#4
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	In reality, I like to splice into the large pink wire behind the ignition switch. (that's how I have done 2 out of 3 of my trucks). However, I got flamed on here for sayig that last time. You can also splice the old coil wire real close to the fire wall where the harness comes out, it is not reduced voltage there...but that looks like poo-poo.

04-13-2003, 02:17 PM	#10
72MARIO Registered User Join Date: Nov 2000 Location: Huntsville Ontario Canada Posts: 4,052	Longhorn. They way you described will work. I want to make you aware of the fact that if you remove the old resistor wire and run the correct gauge wire required for the HEI (I forget the gauge 12 sounds right) from where the Old resistor wire plug in you will have the required 12 volts. Just another way Kinda a clean stock looking conversion. This post Love Tip not a I want to piss you off Post. Mario __________________ 1968 Suburban numbers matching all original truck now equipped with 6.0/4L80 on Accuair http://67-72chevytrucks.com/vboard/s...d.php?t=625017 1967 C/20 6.0/4L80 Roofing Truck 1990 V2500 Suburban "Plow Truck" 2005 TAHOE DD

04-13-2003, 06:11 PM	#11
Roberty Hot Damn - Here I Am!! Join Date: Feb 2000 Location: Ringgold, Georgia Posts: 726	Whew - Thanks for all the responses on the HEI conversion guys!! I really appreciate it. Roberty __________________ My vehicles: '90 Silverado Sport '71 Chevelle SS Convertible '70 C-10 - My Grandfather bought it new - original un-restored

04-13-2003, 07:49 PM	#12
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	72MARIO, i have never seen anyone pull wires out of the block, only bulky crimp on fittings there, thats what I was saying looked like poo-poo. You ain't tickin me off. If I'm wrong or don't know the whole story, speak up. I've been called Obie one truck-nobie on here, but I learned 75% of my truck knowledge on these pages. I just remember what all y'all say and repeat it.

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