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Dauntless V6 Questions

Discussion in 'Early CJ5 and CJ6 Tech' started by jeeperneil, Nov 23, 2009.

  1. Nov 25, 2009
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
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    Sep 20, 2002
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    T86 will be fine for what you're describing.

    Though I did see Boyink grenade his T90 on Test Hill as he attempted to back up the hill after cresting to tug someone.

    I wouldn't worry about it, wheel it until it breaks, and it might not. The BW 3 speeds get a bad rap, but they aren't that bad, esp. for what you just described.
     
  2. Nov 25, 2009
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Medford Mass USA
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    23,596
    I was my understanding that this was a V6-equipped Jeep originally... no engine now, but set up for the 225. Don't assume that a swap from a 225 V6 to the F134 would be easy because they are both engines that were delivered in that chassis. There's a lot of stuff that would have to change. Changing to a different 4-cylinder, with a GM bell pattern (like the 151cid Pontiac, the 153cid Chevy, the 181cid Mercruiser/GM Industrial, or the 150cid Jeep) would likely be easier than converting to a F134.

    If you have the T86, and the Jeep came with a 225, I'd encourage you to drop in your choice of 225/231-OF/231-EF and drive it.
     
  3. Nov 25, 2009
    hansom

    hansom New Member

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    Mar 31, 2009
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    For what its worth, I just rebuilt a 225 that came out of my willys jeep. I have an offenhauser setup, so I'm going to go with a 4bbl 500cfm Edelbrock, and see how that does.
    with a stock cam, what kind of problems do you think I'll hit? I can always pull the cam and get a CROWER brand cam if its not enough, but I'd like to try it with what I have. I just want to know what to expect.............

    I don't have experience, but my opinion is that the 225 oddfire should do just fine. I have mine backed up to a t90, which I'll use until it breaks, and then possibly upgrade to a 5-speed.
     
  4. Nov 25, 2009
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
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    Sep 20, 2002
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    500 CFM is waayyy too much carb for this engine.

    Listen to the guys that have the 390s and 470s, they know what they're doing.
     
  5. Nov 25, 2009
    Patrick

    Patrick Super Moderator Staff Member

    Los Alamos, NM
    Joined:
    Sep 22, 2002
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    8,360
    Just because they are rated to flow 500 CFM, it doesn't mean they're going to push that much through the engine. As long as you can get the A/F mixture right, it doesn't matter what the max CFM rating is. The 500CFM Performer (#1404) is rated for 225-327 cubic inches....
    The Jeep I just bought has one on it, and it ran great. I'm in the process of putting the engine back together and am going to put it in my Jeep.

    edit> within reason, the venturis have to be small enough to still have a, well, venturi effect, to keep air velocity up.
     
    Last edited: Nov 25, 2009
  6. Nov 26, 2009
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
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    Ok. I stand corrected. :oops:
     
  7. Nov 29, 2009
    hansom

    hansom New Member

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    Mar 31, 2009
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    All right, Patrick! : )
    That's what I like to hear
    Within reason, of course. Too much fuel (with a stock cam; i may upgrade later) will still be too much fuel. I'm going to run it as is, and possibly use different jets if I need to scale it down fuel-wise. Between my performance intake and my performance headers, flow should be pretty good.

     
  8. Nov 29, 2009
    A Mandery

    A Mandery Member

    Indianapolis,...
    Joined:
    Dec 2, 2003
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    138
    I run the t86 behind a turbo 231. As Tim says, avoid burn outs and speed shifting and you will do fine. Lots of t90's behind v8's. Only draw back with t86 is cost/availability of parts if you do break something. Also you do not have to move crossmembers and trade out driveshafts. As a side note, my first 225/t86/d18 jeep was frequently abused by a previous owner. Einstein would rev motor and drop the clutch in order to pull front wheels off the ground. The transfercasehad been welded where the texas pattern broke
    off the tranny. No gears broke.
     
  9. Nov 29, 2009
    jeeperneil

    jeeperneil New Member

    Owosso Mi.
    Joined:
    Nov 23, 2009
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    I've got to have the T-86 checked out by someone to make sure it is useable. The Shift cover has been off for a while, and I cant seem to get the forks to line up to drop it in position. I may be getting the running 225 next weekend if Bruce isn't deer hunting again. I've also been reading alot about the 4.3 swaps. Although I don't find GM motors all that appealing, it's hard to argue about part availability. I'm more of a purist when it comes to Jeeps, so I prefer using Jeep native parts:v6:. Everything that I've heard as far as install issues with the 4.3 sound about the same as installing a V8. Considering I have stated before that the wife and I are on a strict budget What really is more cost effective? Keeping a Jeep native motor:v6: my 5 is already equipped for. Or swapping in a TBI 4.3 with dime a dozen parts? Once again this Jeep will be getting used for mild trail duty, dune cruising, and Sunday drives :D. Thanks ahead of time for the input
     
  10. Nov 30, 2009
    SUCKYJUNK

    SUCKYJUNK Painter

    New Lothrop, MI
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    Mar 16, 2008
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    Hi and welcome to the board.

    Joe
     
  11. Dec 1, 2009
    jeeperneil

    jeeperneil New Member

    Owosso Mi.
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    Thanks Joe, and thanks for the info.
     
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