Points to HEI Question ?? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

stepsider · 02-22-2022, 07:09 PM

Going to get rid of my Points Dist And go to GM HEI. Is there any resistance wiring to remove no ballast resistor in system now ??
Is it going to be a simple change over ?

71gmcC15 · 02-22-2022, 07:34 PM

The power wire for points has built in resistance. Have to replace that wire for full 12vs

stepsider · 02-22-2022, 08:06 PM

How far back to replace ? I imagine the source. Correct ?

**Stocker** · 02-22-2022, 08:50 PM

When I did mine many years ago (pre-internet) I ran a 12 ga wire from the HEI to the bulkhead. IIRC, I used the IGN UNFUSED pin for power (lower right on the bulkhead).

**pjmoreland** · 02-22-2022, 08:51 PM

Here's what you will want to do:

https://67-72chevytrucks.com/vboard/...d.php?t=708975

67C10Step · 02-22-2022, 09:16 PM

Quote:

Originally Posted by pjmoreland

Here's what you will want to do:

https://67-72chevytrucks.com/vboard/...d.php?t=708975

This is pretty much the exact thing I followed. Got the connector ends for the bulkhead at my local Napa along with the wiring wrap.

JAV6 · 02-22-2022, 09:31 PM

Quote:

Originally Posted by pjmoreland

Here's what you will want to do:

https://67-72chevytrucks.com/vboard/...d.php?t=708975

This! I did this a few months ago and it was a massive improvement. Don't forget to open up the gap on the plugs (.45-.60) and adjust timing advance.

bry593 · 02-23-2022, 02:25 PM

12 AWG GXL Pink with Packard Electric (Type 56) terminals. You'll need about 4 feet to go from the HEI (bat +) to the firewall bulkhead. Simply remove the old wire (stainless steel did you know?) and plug into the same socket.

Also, remove that secondary yellow wire going down to your starter. It is no longer required. Was a resistance bypass when starting the car. Pretty common on old GM points cars.

Plugs should be gapped to .045" and wires changed to 8mm.

Also, avoid the Chinese HEI as these are complete junk. Find an old original GM dizzy from the 70's and it will work perfectly.

72bowtiestepper · 02-23-2022, 04:13 PM

Quote:

Originally Posted by JAV6

This! I did this a few months ago and it was a massive improvement. Don't forget to open up the gap on the plugs (.45-.60) and adjust timing advance.

I think you mean .045 - .060 gap

.45- .60 is over 1/2 inch !

JAV6 · 02-23-2022, 05:07 PM

Quote:

Originally Posted by 72bowtiestepper

I think you mean .045 - .060 gap

.45- .60 is over 1/2 inch !

Hahaha, you are correct!

02-22-2022, 07:09 PM	#1
stepsider Registered User Join Date: Nov 2013 Location: Roseville, CA Posts: 207	Points to HEI Question ?? Going to get rid of my Points Dist And go to GM HEI. Is there any resistance wiring to remove no ballast resistor in system now ?? Is it going to be a simple change over ?

02-22-2022, 07:34 PM	#2
71gmcC15 Registered User Join Date: Feb 2018 Location: Doland SD Posts: 836	Re: Points to HEI Question ?? The power wire for points has built in resistance. Have to replace that wire for full 12vs __________________ ( second times the charm) 71 gmc c15 307 sbc 373 rear gears positrac sm 465 trans. ( not listed on spid but is original ) 94 chevy k1500 350 tbi 373 rear gears 4l60e one wheel peel. Gutless 07 gmc sierra classic rcsb 4.3 lt 5 speed w/t 04 chevy Silverado 1500 ext cab 5.3 4l60e. 81 chevy Scottsdale k10 muncie sm465 Np208 10 bolt 8.2 ( Old Green)

02-22-2022, 08:06 PM	#3
stepsider Registered User Join Date: Nov 2013 Location: Roseville, CA Posts: 207	Re: Points to HEI Question ?? How far back to replace ? I imagine the source. Correct ?

02-22-2022, 08:50 PM	#4
Stocker 20' Daredevil (Ret) Join Date: May 2003 Location: Jefferson State Posts: 13,571	Re: Points to HEI Question ?? When I did mine many years ago (pre-internet) I ran a 12 ga wire from the HEI to the bulkhead. IIRC, I used the IGN UNFUSED pin for power (lower right on the bulkhead). __________________ - Mike - 1972 K20 LWB 350/350/205 RIP El Jay

02-22-2022, 08:51 PM	#5
pjmoreland Senior Member Join Date: Jan 2005 Location: CA Posts: 5,389	Re: Points to HEI Question ?? Here's what you will want to do: https://67-72chevytrucks.com/vboard/...d.php?t=708975

02-23-2022, 02:25 PM	#8
bry593 Registered User Join Date: May 2016 Location: Oklahoma Posts: 189	Re: Points to HEI Question ?? 12 AWG GXL Pink with Packard Electric (Type 56) terminals. You'll need about 4 feet to go from the HEI (bat +) to the firewall bulkhead. Simply remove the old wire (stainless steel did you know?) and plug into the same socket. Also, remove that secondary yellow wire going down to your starter. It is no longer required. Was a resistance bypass when starting the car. Pretty common on old GM points cars. Plugs should be gapped to .045" and wires changed to 8mm. Also, avoid the Chinese HEI as these are complete junk. Find an old original GM dizzy from the 70's and it will work perfectly. __________________ 1971 C20 Custom Deluxe, HT383, 4L80E, 3.73 Locker, 4 Wheel Discs



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