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68 Cj5 Holley Super Sniper Tbi 2gc Or Howell Tbi

Discussion in 'Early CJ5 and CJ6 Tech' started by Phillykaiser79, Jan 13, 2021.

  1. Feb 24, 2021
    timgr

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    This implies that the Holley ECU might work with the odd-fire tach signal?

    Electronically I think it would not be hard to do, if they planned for it.
     
  2. Feb 24, 2021
    truckee4x4

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    FYI I called Holley again on lunch break today to dig a little deeper into this with some specific questions and I got a "there is just no way to get our Sniper system to talk to an odd-fire engine." I specifically asked about installing a crank sensor and was still told a "hard no." So........
     
  3. Feb 24, 2021
    Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

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    truckee4x4 likes this.
  4. Feb 24, 2021
    truckee4x4

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    Right? All this stuff is expensive!
     
  5. Feb 24, 2021
    Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

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    I suspect the uneven signal would trick the ecu into thinking the engine was constantly speeding up & slowing down causing the mixture to constantly hiccup.
     
  6. Feb 24, 2021
    truckee4x4

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    So can someone explain why the Howell EFI system apparently would work but the Holley one will not? Is it because the Howell system has a sensor that can read off of vacuum advance?
     
    Last edited: Feb 24, 2021
  7. Feb 24, 2021
    Mcruff

    Mcruff Earlycj5 Machinist

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    Nope!
     
  8. Feb 24, 2021
    Mcruff

    Mcruff Earlycj5 Machinist

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    There literally covering their butt because they have never tried it. The link I posted above, call these guys and actually ask if the have done this. They say in their ad you need an HEI but they actually advertise this system for Jeep/Buick odd fire v6.
     
  9. Feb 24, 2021
    truckee4x4

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    I've got a call into Ryan @ BJs, will see what he says tomorrow and report back.
     
  10. Feb 24, 2021
    Steve's 70-5

    Steve's 70-5 Active Member

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    When I was looking for the EFI for my Jeep. Emailed Holley and the said the ECU will not read the tach signal. So it will not work.

    You are looking at a 2 bbl and 4 bbl TB. What intake manifold do you have on your engine? Putting a 4 bbl TB on a 2bbl intake might not work.
     
  11. Feb 25, 2021
    truckee4x4

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    Steve what HEI unit do you have?
     
  12. Feb 25, 2021
    Steve's 70-5

    Steve's 70-5 Active Member

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    I found/got a NOS Buick HEI odd-fire distributor
     
  13. Feb 25, 2021
    Warloch

    Warloch Did you say Flattie??? Staff Member

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    I put all the conversations I had with Holley in the other thread. I was looking into it at the same time Steve was for his setup.

    I truly believe it comes down to the ECU they use is setup to control spark too. While it may not be implemented in this unit, the odd pulses would register and cause issues.

    The other units DON'T have this in the ECU, so the pulse from the strong HEI system allows them to work fine.
     
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  14. Feb 25, 2021
    truckee4x4

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    Thanks @Warloch.

    Ryan at BJs had this to say (I told him a tech @ Holley told me the Sniper won't work with an odd fire V6):

    Holley means their Sniper won’t integrate with timing control. You simply install our DUI distributor DUI HEI Distributor Buick Dauntless Odd-Fire 225 V6 USA Made! and then set timing like you normally would. Everything will work properly other than the sniper won’t control timing. Yes, our distributor has a connection for the tach signal, which you can then use as a signal to the sniper. But again, it doesn’t integrate with / control timing on the 225.​

    He said they have sold 40-50 of them this year. I'd love to find out who a few of those folks are and ask them how they are getting on with it. And ask them how a $400 distributor works!
     
    Last edited: Feb 25, 2021
  15. Feb 26, 2021
    Warloch

    Warloch Did you say Flattie??? Staff Member

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    Make him a deal - if it works, fine, if not, he pays for the Sniper System.... All the systems I've worked with or installed have HEI. All required a 'filter' to be put in the tach signal. None of them are trying to do anything with spark signal... I'm not willing to buy a product that a manufacture says won't work and so I'm screwed if I try it and want to return it.

    I'd love to find out what he puts in his HEI Distributor that makes it a $400 setup... The last HEI for the 225 I built with 'new' parts was @ $125.
     
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  16. Feb 27, 2021
    colojeepguy

    colojeepguy Colorado Springs

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    The DUI distributors for a Buick V6 use a new housing that's taller, to eliminate the clearance issues with the OEM units.
     
  17. Feb 27, 2021
    Norcal69

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    If your spinning your dauntless high enough RPM to need anything more than a OEM oddfire HEI..... you will be looking for your next dauntless engine.
    There is no reason to buy the DUI setup unless you just gotta have the new taller body distributor.
     
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  18. Feb 27, 2021
    Steve's 70-5

    Steve's 70-5 Active Member

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    Looked at the DUI distributor. Looked at the second picture in the link. They put # 1 at a different location than the Buick HEI I have, if that means anything.

    DUI HEI Distributor Buick Dauntless Odd-Fire 225 V6 USA Made!


    When looking for my EFI system, I emailed Holley tech, here is the conversation.

    Steve "Looking at your Holley Sniper 2 Barrel small bore. I have a Buick odd-fire engine. For RPM, will the Sniper read a Square Edge Wave signal from GM HEI Distributor"

    Holley " It can read a signal from the HEI but it will not read an odd-fire signal. You would need something to create an even fire RPM signal."

    Steve "If I was to use a Holley part# 554-124 and attached a metal piece to the crank. Will the Holley part # 544-124 send a good RPM signal to the ECU for RPM, if there is a way that the ECU can accept the signal."

    Holley "Yes, folks have done that and similar magnetic crank trigger system."
     
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  19. Feb 27, 2021
    Rich M.

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    I can solve that in seconds with a flap disc at no cost
     
  20. Feb 27, 2021
    colojeepguy

    colojeepguy Colorado Springs

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    Hmmm, it took me probably 30 minutes with a dremel (Offy intake) and an Allen head bolt for the manifold. But I get your point.
     
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