Register now to get rid of these ads!

Hot Rods I've Had It With HEI.

Discussion in 'The Hokey Ass Message Board' started by Bonehead II, Aug 19, 2020.

  1. Bonehead II
    Joined: Apr 18, 2005
    Posts: 421

    Bonehead II
    Member

    Yea, That's right I am DONE with HEI. I have a 38 Plymouth coupe with a slant six that moves right along. Every year there a HEI problem, or two problems, I went as far to buy the Pertronix match coil and 4 pin module....NO more. I putting the old points distributor back in, and driving it without a care.
    Thanks Mike
     
    6inarow, 302GMC, bob b. and 9 others like this.
  2. rockable
    Joined: Dec 21, 2009
    Posts: 3,195

    rockable
    ALLIANCE MEMBER

    I will bet that if you changed your alternator, the problem will go away. Thats been my experience, as long as the distributor is properly grounded.
     
  3. GTS225
    Joined: Jul 2, 2006
    Posts: 1,175

    GTS225
    Member

    Is it your modules that keep failing? That's a common problem faced by a lot of the HEI swaps over on the slantsix board, too. Seems like it getting quite hard to get a decent quality module anymore.

    Roger
     
  4. Elcohaulic
    Joined: Dec 27, 2017
    Posts: 1,558

    Elcohaulic
    Member

    You have come to your senses.. Run the points and if you want more use the points to trigger a CD box like the Vertex Z6 or an old American made MSD6AL...

    I've pulled many HEIs for the old points... If you can, get a points distributor that's made from iron.. Chevrolets have it made, they have so many cool points distributors, cable tach drives, dual points, you could put a three way switch on both sets of points and run the common terminal to the coil that way you could switch when you want more or less timing. But the ultimate is how cool they look..
     
    Last edited: Aug 19, 2020
    Ned Ludd likes this.

  5. bill gruendeman
    Joined: Jun 18, 2019
    Posts: 454

    bill gruendeman
    Member

    Hei is a gm dizzy maybe that’s the problem in your leaning tower of power. Haha
     
    Last edited: Aug 19, 2020
    scotty t and theman440 like this.
  6. I've been able to buy USA made sbc hei modules at NAPA.

    Phil
     
    jim snow and i.rant like this.
  7. TA DAD
    Joined: Mar 2, 2014
    Posts: 283

    TA DAD
    Member
    from NC

    Just put a Chrysler dist. and box on it. They are about as trouble free as they come. Five wires to hook up and your done.
     
  8. Bob Lowry
    Joined: Jan 19, 2020
    Posts: 413

    Bob Lowry

    I'm with you...I gave up on HEI's 15yrs ago...I've tried all types of distributors... MSD's, HEI's, Pertronix, GM dual point, Mallory dual points, and single point GM. BBC and SBC's.

    I went back to single point GM dist., set up with correct weight, good condenser and HD points, good springs and
    vacuum advance canisters. Since then I have never gotten stranded or had tuning issues. Just my 2 cents worth.
     
    Elcohaulic likes this.
  9. partsdawg
    Joined: Feb 12, 2006
    Posts: 2,847

    partsdawg
    ALLIANCE MEMBER
    from Minnesota

    Points are traditional
     
  10. blowby
    Joined: Dec 27, 2012
    Posts: 7,198

    blowby
    Member
    from Nicasio Ca

    Yeah, why are all these slant 6 guys using HEIs anyway?
     
  11. Magnetos rule
     
    6inarow, rbrewer, 427 sleeper and 2 others like this.
  12. Bonehead II
    Joined: Apr 18, 2005
    Posts: 421

    Bonehead II
    Member

    Can you tell me more, I am running a Denso because I don't have much room...thanks
     
  13. Elcohaulic
    Joined: Dec 27, 2017
    Posts: 1,558

    Elcohaulic
    Member

    Right On! But $$$$
     
  14. rockable
    Joined: Dec 21, 2009
    Posts: 3,195

    rockable
    ALLIANCE MEMBER

    3 possible problems, as i think about it. If the voltage regulator isn't keeping the voltage within recommended norms, that can cause problems. It could be ok for a while and change after it gets hot, so just checking it once won't tell you much.

    Also, an alternator makes alternating current. It is rectified by a trio of diodes. If one of those diodes is "leaking", it will allow some A.C. voltage to be in the system on top of the normal DC. Set your digital meter to A.C. and see what you've got. If I remember correctly, as little as .5 volts A.C. can cause problems and you will fail electronic components.

    Third is grounding of the distributor. The distributor, typically is grounded by its contact with the engine block. If there is paint between the 2 surfaces or chrome plating, say on the hold down clamp, that can cause there to be resistance in the grounding circuit. Pertronix has a spec, I believe is like .2 ohms. Check the resistance from your distributor housing to the negative terminal of your battery. I even drilled and tapped a hole in my Pertronix distributor and attached a wire which I grounded to the firewall. Pertronix has good tech support, in my experience.

    Check these things out before giving up. I replaced an old GM alternator on my truck and solved my HEI problem and I fixed a grounding issue on my 57 Chevy to fix my Pertronix issue. Good luck!
     
    clunker, warbird1, trollst and 3 others like this.
  15. Aaron65
    Joined: Dec 29, 2005
    Posts: 285

    Aaron65
    Member
    from Michigan

    Just a thought...what's your supply voltage to the HEI? The PO installed an HEI distributor in my OT Firebird, and the supply wire had resistance. I ran a relay to the HEI to get full battery voltage. This may or may not be your problem, but I've read that HEIs don't like to run low on voltage.
     
    scrap metal 48 and pprather like this.
  16. chopolds
    Joined: Oct 22, 2001
    Posts: 5,868

    chopolds
    Member
    from howell, nj
    1. Kustom Painters

    I don't get it. Been running electronic ignition on ALL my old cars for over 40 years. Even converted my 55 Olds distributor to Chrysler electronic ignition. Besides having to replace a coil or 2, and a ballast or 2, never an issue!
     
    flatheadpete and Bandit Billy like this.
  17. Not sure about the GM HEI conversions, but MoPar's electronic ignition systems seem to be fairly bullet proof. But as already mentioned you will want to use Chrysler's recommended electronic voltage regulator. The ignition conversion kits sold thru Direct Connection years ago had a specific requirement for their electronic regulator to replace an older mechanical voltage regulator.

    But there ain't no reason not to run points either. With the slant six you just have to keep an eye on the nylon distributor drive gear.
     
  18. 73RR
    Joined: Jan 29, 2007
    Posts: 6,516

    73RR
    Member

    Might be a terminology problem here...HEI is definitely a GM product so what exactly are you running?
    It plenty easy to use the Mopar electronic system and they are well proven.

    .
     
  19. trollst
    Joined: Jan 27, 2012
    Posts: 1,900

    trollst
    ALLIANCE MEMBER

    I'm with Rockable, most guys don't run enough grounds, I ground the dist to the block with a wire, in twenty years of hei In my 327-36 ford, never a failure. I also ground the rad to the frame with a 10 gauge wire, helps with the electrolisis issues. To each his own.
     
    flynbrian48 and Hnstray like this.
  20. 73RR
    Joined: Jan 29, 2007
    Posts: 6,516

    73RR
    Member

    Agreed, solid heavy grounds are essential with any electronic system and especially with the Mopar ECU.

    .
     
    Hnstray likes this.
  21. jaracer
    Joined: Oct 4, 2008
    Posts: 686

    jaracer
    Member

    When I worked for a Dodge dealer, slant 6 distributors were kept under the main counter along with dual ballast resistors. The main reason the distributor gear failed was a point or condenser screw dropped into the mechanical advance. With the ballast resistors, we recommended that the customer purchase 2 and keep on in the glove box for the next time it failed.
     
  22. Mr48chev
    Joined: Dec 28, 2007
    Posts: 28,156

    Mr48chev
    ALLIANCE MEMBER

    HEI problems normally are caused by external issues. Simply meaning that if you are blowing modules all too frequently you have other problems causing that such as a coil going out, too high of resistance in the secondary system or other contributing factors. That is my experience with vehicles that were all factory HEI equipped.
     
  23. .......needs a new flint. :mad:
     
  24. flatheadpete
    Joined: Oct 29, 2003
    Posts: 10,037

    flatheadpete
    Member
    from Burton, MI

    I ran Pertronix on my Merc flatty with a generator. Ran a Chevy I6 HEI on my AMC I6 with the same Ford generator. Ran Pertronix on my '65 Caddy and am currently running GM-style HEI on my 302 Ford in my Shoebox with a GM style 1-wire alternator. Never had any problems at all with any of them. They just plain work!
     
    Last edited: Aug 20, 2020
    Truckdoctor Andy likes this.
  25. 1971BB427
    Joined: Mar 6, 2010
    Posts: 6,251

    1971BB427
    Member
    from Oregon

    I put an ACCEL points conversion kit in my SBC distributor, and it requires the use of the original ceramic inline resistor in the circuit. I think this system retaining the resistor helps save the electronic conversion, and avoid high voltage spikes known to happen on cars using an alternator. So far it's been trouble free, even with my alternator occasionally putting out just over 14 v.
     
    olscrounger likes this.
  26. Hnstray likes this.
  27. Ned Ludd
    Joined: May 15, 2009
    Posts: 4,155

    Ned Ludd
    Member

    Tell me more about the three-way switch thing? It sounds like something which might feed into what I was thinking about here: https://www.jalopyjournal.com/forum/threads/traditional-friendly-knock-control.1195784/
     
  28. Elcohaulic
    Joined: Dec 27, 2017
    Posts: 1,558

    Elcohaulic
    Member

    Hmm, that could work for you.. You could have the sensor control a relay to the lower or higher set of points.. From what I remember the amount of timing change isn't drastic, maybe 3 to 5 degrees, so this should be right down your alley..
    I'm presently looking for a nice Delco, dual point, with tach drive made from Iron. The iron distributors seem to work better and last longer.. I run a #12 stranded from the points to the alternator and have it ending at the battery.. Removing the vacuum advance and screwing down the plate really helps to keep the point action stable and grounding optimal..
     
    Ned Ludd likes this.
  29. lostone
    Joined: Oct 13, 2013
    Posts: 1,479

    lostone
    Member
    from kansas

    Do the factory mopar electronic distributor with a good external hei module. 2 wires to distributor, 1 to coil and 12 volt hot wire.

    Putting one on my 440, mopar guys say it works excellent and that no aftermarket distributor can work any better...
     
    Elcohaulic likes this.
  30. lostone
    Joined: Oct 13, 2013
    Posts: 1,479

    lostone
    Member
    from kansas

    Here's the wiring setup,simple.
     

    Attached Files:

Share This Page

Register now to get rid of these ads!

Archive

Copyright © 1995-2020 The Jalopy Journal: Steal our stuff, we'll kick your teeth in. Terms of Service. Privacy Policy.

Atomic Industry
Forum software by XenForo™ ©2010-2014 XenForo Ltd.