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HEI module...updated, success! #779085 08/20/10 06:46 PM 08/20/10 06:46 PM
Joined: Sep 2007 Posts: 738 TN '84 D150 Shorty OP Pickup Man
'84 D150 Shorty OP Pickup Man Joined: Sep 2007 Posts: 738 TN	Ok, now don't start hatin on me for thinkin it, but...I am fixing to install a GM HEI module on my truck gasp I was wondering if anybody else has done it, and do ya have pics? The wiring looks like it is very straightforward, and it will clear some clutter and simplify my wiring harness and hopefully ease the engines electrical needs.... don't be embarressed if you have GM parts on yer mopar! How did you mount it? Are you using a heat sink? Did you retain your original as a backup? Or did you remove your ECU system completely (which is what I'm thinking of doing)?

Re: HEI module... [Re: '84 D150 Shorty] #779086 08/20/10 08:39 PM 08/20/10 08:39 PM
Joined: Apr 2007 Posts: 1,261 ILL mark7171 pro stock
mark7171 pro stock Joined: Apr 2007 Posts: 1,261 ILL	Crisp, Clean, and no Caffiene. If you do not want to spend the money for the excellent FBO system, this is a strong second choice. The way to make a start stand ignition stsyem too. Works super. link page

Re: HEI module... [Re: '84 D150 Shorty] #779087 08/20/10 09:57 PM 08/20/10 09:57 PM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	Quote: How did you mount it? Are you using a heat sink? Mount it on a piece of aluminum plate w some dielectric clear grease in between for the heat sink (required). Some one either on here or eGay sells a plate to mount it under the dist for twenty some dollars but just make your own & bolt it to the bottom of the dist & yes mounting it under the dist is the perfect place for it. The one I originally used was one from a '75 chebby 350 eng w the 4 identical 1/4" male terminals. live every 24 hour block of time like it's your last day on earth

Re: HEI module... [Re: RapidRobert] #779088 08/21/10 01:03 AM 08/21/10 01:03 AM
Joined: Sep 2007 Posts: 738 TN '84 D150 Shorty OP Pickup Man
'84 D150 Shorty OP Pickup Man Joined: Sep 2007 Posts: 738 TN	Quote: Quote: How did you mount it? Are you using a heat sink? Mount it on a piece of aluminum plate w some dielectric clear grease in between for the heat sink (required). Some one either on here or eGay sells a plate to mount it under the dist for twenty some dollars but just make your own & bolt it to the bottom of the dist & yes mounting it under the dist is the perfect place for it. The one I originally used was one from a '75 chebby 350 eng w the 4 identical 1/4" male terminals. Mounting under the dizzy sounds perfect! Got any pics of yours?

Re: HEI module... [Re: '84 D150 Shorty] #779089 08/21/10 01:25 AM 08/21/10 01:25 AM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	Quote: Mounting under the dizzy sounds perfect! Got any pics of yours? No I didn't take pics of the 1st one (440) way back and I dont have this SB one finished yet (gettin close though) live every 24 hour block of time like it's your last day on earth

Re: HEI module... [Re: RapidRobert] #779090 08/21/10 09:25 AM 08/21/10 09:25 AM
Joined: Feb 2005 Posts: 709 St Louis, MO 63026 convx4 super stock
convx4 super stock Joined: Feb 2005 Posts: 709 St Louis, MO 63026	Working on this, and have done a lot of research. Slantsix.org has a great page with lots of info. http://www.slantsix.org/forum/viewtopic.php?t=28732&highlight=hei Use the links in the first post for more info and parts list. I have about $80 invested and on my third design of a coil mounting bracket. I would like it to fit in the stock location. And might mount the HEI where the the ballast resistor was. I am tired of not being able to get parts at any parts store, (We have to order that). I want reliability so I can drive my cars any where. Adding relays for the head lights was the second best improvement To any old mopar in my opinion. First is having the steering box rebuilt by steer and gear.

Re: HEI module... [Re: convx4] #779091 08/21/10 02:40 PM 08/21/10 02:40 PM
Joined: Apr 2007 Posts: 1,261 ILL mark7171 pro stock
mark7171 pro stock Joined: Apr 2007 Posts: 1,261 ILL	Easy. Last edited by mark7171; 08/26/10 01:49 AM.

Re: HEI module... [Re: mark7171] #779092 08/21/10 11:35 PM 08/21/10 11:35 PM
Joined: Sep 2007 Posts: 738 TN '84 D150 Shorty OP Pickup Man
'84 D150 Shorty OP Pickup Man Joined: Sep 2007 Posts: 738 TN	Ahhh.... I see! Very cool! Out of sight out of mind, I like that! Cant wait to do this mod!

Re: HEI module... [Re: '84 D150 Shorty] #779093 08/22/10 01:29 AM 08/22/10 01:29 AM
Joined: Sep 2005 Posts: 1,202 California P polkat mopar addict
polkat mopar addict P Joined: Sep 2005 Posts: 1,202 California	Yea, slantsix.org has this fully covered. Here's the best page on that site. http://slantsix.org/forum/viewtopic.php?t=15779 I made the unit below for my 73 Dart. It was wired like explained on slantsix including the relay. Notice the heatsink underneith and the electic grease under the module. Important stuff. Some guys just bolt the module to the inner fender to act as a heatsink, but I burned a few that way. This heatsink was adopted from a computer CPU heatsink. Worked great, if a little ugly (that can be fixed), and I've always copied it in every Mopar I've owned since. 6152324-HeatSink.gif (322 downloads)

Re: HEI module... [Re: '84 D150 Shorty] #779094 08/22/10 02:20 AM 08/22/10 02:20 AM
Joined: Feb 2004 Posts: 4,501 Gainesville,FL G goldmember master
goldmember master G Joined: Feb 2004 Posts: 4,501 Gainesville,FL	Quote: Ok, now don't start hatin on me for thinkin it, but...I am fixing to install a GM HEI module on my truck gasp I was wondering if anybody else has done it, and do ya have pics? The wiring looks like it is very straightforward, and it will clear some clutter and simplify my wiring harness and hopefully ease the engines electrical needs.... don't be embarressed if you have GM parts on yer mopar! How did you mount it? Are you using a heat sink? Did you retain your original as a backup? Or did you remove your ECU system completely (which is what I'm thinking of doing)? In 1984-85 when doing this mod,I simply mounted the HEI in a position to gain a little airflow,not a big deal really.

Re: HEI module... [Re: goldmember] #779095 08/22/10 03:57 AM 08/22/10 03:57 AM
Joined: Apr 2007 Posts: 1,261 ILL mark7171 pro stock
mark7171 pro stock Joined: Apr 2007 Posts: 1,261 ILL	My setup does not melt down after the vehicle warms up. The HEI has been in service for years. People like to use the MSD AL mounting plate for a clean look. Never seen that much heatsink on a 4 pin. That melting only happens in extreme cases, and mistakes.

Re: HEI module... [Re: mark7171] #779096 08/22/10 04:18 AM 08/22/10 04:18 AM
Joined: Aug 2003 Posts: 4,481 Mesa, AZ P Pat_Whalen super gas
Pat_Whalen super gas P Joined: Aug 2003 Posts: 4,481 Mesa, AZ	All the good information has been posted regarding the HEI swap. What I will post is that di-electric grease should not be used between the HEI module and the heatsink. Thermal paste should be.

Re: HEI module... [Re: Pat_Whalen] #779097 08/22/10 03:40 PM 08/22/10 03:40 PM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	Quote: All the good information has been posted regarding the HEI swap. What I will post is that di-electric grease should not be used between the HEI module and the heatsink. Thermal paste should be. I stand corrected as yes you are transfering heat not voltage (the 2 mounting screws ground it). Who/what/where can I get thermal paste for this one I'm doing and since I only need a wipe of it on this one module what kind of shop uses it so if need be I'll hit them up for a slight amt. live every 24 hour block of time like it's your last day on earth

Re: HEI module... [Re: RapidRobert] #779098 08/22/10 08:48 PM 08/22/10 08:48 PM
Joined: Sep 2006 Posts: 1,680 Raleighwood 2Bad360sfromNC top fuel
2Bad360sfromNC top fuel Joined: Sep 2006 Posts: 1,680 Raleighwood	I've done this on my old Valiant, and on my Challenger. I have always just mounted them to the inner fender, and so far have never even had one get warm to the touch. 1968 Charger project. I don't have a fender tag or a buildsheet, so it's getting a 440. Help me decide on a color--most everything looks great! (NOT white. My Challenger is white. Need some variety :D) 1974 Challenger 360 2012 Challenger R/T 1991 Dakota 5.2

Re: HEI module... [Re: 2Bad360sfromNC] #779099 08/22/10 09:07 PM 08/22/10 09:07 PM
Joined: Feb 2005 Posts: 709 St Louis, MO 63026 convx4 super stock
convx4 super stock Joined: Feb 2005 Posts: 709 St Louis, MO 63026	Over the weekend did some work on this. I wanted to take the advantage of the E-coil and not just the HEI module. It took me three tries to get a bracket that would fit and still leave some access. I mounted the E-coil in the same location as the factory coil. I was going to re curve my distributor after the modification was done, so I didn't want to mount the HEI to it. So I made a mount on the front of the coil. I still have some wiring to complete before I test this out. 6153501-coronetdakota8-10054(Medium).jpg (479 downloads)

Re: HEI module... [Re: convx4] #779100 08/22/10 11:20 PM 08/22/10 11:20 PM
Joined: Jan 2003 Posts: 1,443 7 70duster340 pro stock
70duster340 pro stock 7 Joined: Jan 2003 Posts: 1,443	Does this conversion work on early model Mopars, such as a 1970 Duster? Is it a better setup than the stock electronic ignition with the chrome box?

Re: HEI module... [Re: 70duster340] #779101 08/22/10 11:40 PM 08/22/10 11:40 PM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	yes, just need an electronic dist to trigger it and Jacobs ign says that it is the only ECU that electronically increases the dwell time as the rpm increases and supposedly it was (in part) developed by some retired NASA space scientists in the early 70's live every 24 hour block of time like it's your last day on earth

Re: HEI module... [Re: RapidRobert] #779102 08/23/10 12:10 AM 08/23/10 12:10 AM
Joined: Jan 2003 Posts: 1,443 7 70duster340 pro stock
70duster340 pro stock 7 Joined: Jan 2003 Posts: 1,443	So, it does away with the ECU and ballast resistor? Sounds like it would really clean up an engine bay this way!

Re: HEI module... [Re: 70duster340] #779103 08/23/10 09:22 AM 08/23/10 09:22 AM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	Quote: So, it does away with the ECU and ballast resistor? Sounds like it would really clean up an engine bay this way! ((1) correct (2) yes it does live every 24 hour block of time like it's your last day on earth

Re: HEI module... [Re: RapidRobert] #779104 08/23/10 09:54 AM 08/23/10 09:54 AM
Joined: Aug 2003 Posts: 4,481 Mesa, AZ P Pat_Whalen super gas
Pat_Whalen super gas P Joined: Aug 2003 Posts: 4,481 Mesa, AZ	Quote: Quote: All the good information has been posted regarding the HEI swap. What I will post is that di-electric grease should not be used between the HEI module and the heatsink. Thermal paste should be. I stand corrected as yes you are transfering heat not voltage (the 2 mounting screws ground it). Who/what/where can I get thermal paste for this one I'm doing and since I only need a wipe of it on this one module what kind of shop uses it so if need be I'll hit them up for a slight amt. Here is a source for one of the "better" thermal pastes out there: http://www.amazon.com/Arctic-Silver-Polysynthetic-Thermal-Compound/dp/B002CZAPUQ

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