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Single vs: dual plane intake

Discussion in 'Early CJ5 and CJ6 Tech' started by msbweiland, May 30, 2004.

  1. May 30, 2004
    msbweiland

    msbweiland Member

    Yakima, WA
    Joined:
    Oct 26, 2002
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    81
    Anyone have any experience wheeling w/ a single plane intake? Is there a major differance compared to a dual plane intake? The only thing I can find for my TBI swap is an Weiand single plane intake.
    Has anyone ever swapped a single plane intake into a Jeep and wheeled it? :D
     
  2. May 30, 2004
    Ledge

    Ledge Member

    Old Town, Maine
    Joined:
    May 5, 2004
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    72
    I wouldn't think you'd want to sacrifice the lower end torque for higher end torque. It may not be as noticeable with fuel infection, but I've never put either to practice on the trail. What is your predominant wheeling environment?
     
  3. May 30, 2004
    msbweiland

    msbweiland Member

    Yakima, WA
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    Oct 26, 2002
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    Muddy/Rocky trails in the Pacifice Northwest. I actually live about 20 min from where Petersons did their 1st adventure series. 8)
    I've never used a single plane intake so I thought I'd ask. :D
     
  4. May 30, 2004
    w3srl

    w3srl Semi-homeless in Florida Staff Member

    Port Orange, FL
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    Nov 6, 2002
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    3,958
    Generally speaking-

    Single plane = Max HP @ high RPMs.

    Dual-Plane = Better low-end torque at the cost of *some* high end HP.

    I think I would hold out to find a dual-plane manifold.

    Wait a minute - Isn't the TBI a two-hole injector??? Why not use a two barrel intake?
     
  5. May 30, 2004
    msbweiland

    msbweiland Member

    Yakima, WA
    Joined:
    Oct 26, 2002
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    81
    the holes are too big for a standard 2bbl. It came with an adapter for a 4bbl manifold and I figured that would be better than trying to make my own adapter for a 2bbl manifold.
     
  6. May 30, 2004
    66cj5

    66cj5 Jeep with no name

    NorthWest Indiana
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    Sep 10, 2003
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    2,069
    room to cut'm bigger????
     
  7. May 30, 2004
    James P. Enderwies

    James P. Enderwies Sponsor

    Lake Havasu City, AZ
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    Remember, our stock :v6: manifolds are single plane.
     
  8. May 30, 2004
    msbweiland

    msbweiland Member

    Yakima, WA
    Joined:
    Oct 26, 2002
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    Remember, our stock manifolds are single plane

    Good point, never thought of that. I wonder if the 4bbl single plane would make much of a differance? :? Now I'm leaning more toward the Weiand intake. :rofl: I guess I've got a couple of days to decide.
     
  9. May 30, 2004
    James P. Enderwies

    James P. Enderwies Sponsor

    Lake Havasu City, AZ
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    Feb 2, 2003
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    747
    Weiand intake are good. I feel no reason to go to a 4bbl, but I would like a Weiand, just in case. ;)

    If you find new ones (I have not), let me know.
     
  10. May 30, 2004
    w3srl

    w3srl Semi-homeless in Florida Staff Member

    Port Orange, FL
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    Hmm. I did not know that. :oops:

    Rather interesting for a late-fifties design. D'ya suppose that was as much to make the profile as low as possible as it was to produce top-end power???
     
  11. May 30, 2004
    msbweiland

    msbweiland Member

    Yakima, WA
    Joined:
    Oct 26, 2002
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    81
    Summit Racing has them. I think it was 150+ or so. I don't plan on a 4bbl, I'm just using it to adapt the Pro-Jection. ;)
     
  12. May 31, 2004
    James P. Enderwies

    James P. Enderwies Sponsor

    Lake Havasu City, AZ
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    Steve: Just my wild thinking with nothing to back it up, but considering our 50+ lb flywheels and the inherent low end torque of the :v6: , maybe they use the single plane to get a little top end out of it. I don't know if they used the same manifold on the car engines, but I think they did.
     
  13. May 31, 2004
    w3srl

    w3srl Semi-homeless in Florida Staff Member

    Port Orange, FL
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    Good point Jim. That would certainly make sense!
     
  14. May 31, 2004
    James P. Enderwies

    James P. Enderwies Sponsor

    Lake Havasu City, AZ
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    msbweiland: I searched there before and again. Don't show it on their on-line cataloge, at least I couldn't find it. But good to know that someone carries it.
     
  15. May 31, 2004
    msbweiland

    msbweiland Member

    Yakima, WA
    Joined:
    Oct 26, 2002
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    81
    Under their search type "buick intake weiand". It'll bring up the intake. I'm going to call make sure first but it says the intake will fit the 64-67 225's. :twisted:
    I may give it a try and see what happens if it'll fit. Hey, it's only $.
     
  16. Jun 1, 2004
    Phalanxx

    Phalanxx Jeep Newbie

    iraq, texas,...
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    Jan 13, 2004
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    edelbrock makes one for the later model heads (the larger intake ports/runners). if you are running the later heads, that intake would slide right one (and if i remember correctly, it was a dual plane 4 bbl. i havent looked at it in a while)
    its listed under even fire along with the cam pagkage.
     
  17. Jun 1, 2004
    Phalanxx

    Phalanxx Jeep Newbie

    iraq, texas,...
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    Buick 231 V6 Even Fire
    Performer Buick V6 (idle-5500 rpm)

    Designed for 1979 and later street 231/252 c.i.d. (252 c.i.d. 1980-84 only) Buick V6 engines with late-model cylinder heads. Manifold will not fit pre-1979 engines. Manifold not equipped with EGR. Not compatible with C-3 and C-4 electronic fuel management systems. See Power Package Graph.

    Performer Buick V6 (non-EGR) .....#5486
     
  18. Jun 2, 2004
    JAB

    JAB Member

    Genesee, WI
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    Sep 9, 2003
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    98
    I've used both types (Buick 252 ci 4bbl single plane, Holly Dominator, Edlebroc Performer, & stock Buick V6). By a wide margin the dual plane Edlebroc Performer worked best for the RPM ranges & altitudes I use. Each set-up will vary a bit depending on carb/FI, etc. but the single plane aftermarket manifolds are for high RPM's, the stock V6 manifold, athough single plane is essentially designed for all-around use, & the dual plane after-market designs are probably similar to the stock versions except that they allow you to put on a 4bbl carb or fuel injection & still work in the widest RPM ranges.
     
  19. Jun 3, 2004
    ljspop

    ljspop Lurking Bronco Dude

    San Diego, CA
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    Jan 29, 2003
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    394
    I have a Weiand sitting on my shelf. I put a stocker back on when I couldn't get/find a decent 4bbl for my application (225 - mild cam - decent off road performance on hills and washboard). I hope to eventually mate the 2bbl I'm running to that manifold, just need to do it with very little height added due to the tight flattie engine bay. The runners on the Weiand are volumonous (sp?, big!) compared to the stocker. Since I changed the carb and manifold at the same time I'm not sure how much difference putting the weiand back on will make - but I think it will be fairly significant. I had no lack of bottom end with the Weiand/Holley, and much more mid and hi-end (I'd define hi end on this engine as over 3200 ish RPM ;) ).

    Bob
     
  20. Jun 3, 2004
    msbweiland

    msbweiland Member

    Yakima, WA
    Joined:
    Oct 26, 2002
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    I'm going to wait for the dual plane. I have a few friends looking for me but I'll probbably end up waiting. :rofl:
     

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