1. Registration trouble? Please use the "Contact Us" link at the bottom right corner of the page and your issue will be resolved.
    Dismiss Notice

225 exhaust headers/manifold question

Discussion in 'Flat Fender Tech' started by Tedscj3, Jul 23, 2006.

  1. Jul 23, 2006
    Tedscj3

    Tedscj3 New Member

    Joined:
    Jun 25, 2005
    Messages:
    22
    Hi all, I am swapping in a 225 v6 into a 50 cj3a. It came from a 69 cj. I have saginaw steering and it looks like I will have to notch a motor mount to mave it clear. My next problem is the headers that came off the 69 are outside the frame type and are hitting the firewall fender seam. What will work better than this? If need be I will cut and reweld these to fit. Will stock manifolds work with both faceing the rear. Any advice or part supplier names would really be appreciated. Thanks
     
  2. Jul 23, 2006
    Posimoto

    Posimoto Hopeless JEEP Addict

    Minden, Nevada
    Joined:
    Aug 7, 2003
    Messages:
    4,486
    There will be plenty of people who will contradict me here, but I'd say ditch the headers. They really won't offer you anything in the way of real power increase (without doing a cam, intake manifold.......)but they will help you heat up the floorpan and position your mufflers so you can beat the dog snot out of them on the rocks. That is of you have rocks where you are. My advice is, use the manifolds off of a Buick passenger car with a 231. Mid to late 80's work well. The drivers side manifold is fairly flat and you can just squeek your steering shaft by it. And yes, you may have to notch the left motor mount. Good to see another NRA Life Member on board.
     
  3. Jul 23, 2006
    Bucket of Bolts

    Bucket of Bolts Broke Member

    Dinuba, Ca.
    Joined:
    Jun 3, 2006
    Messages:
    60
    I happen to agree. Ditch the headers. I guess it comes down to what you do with your jeep. If you want low end torque and an engine that will lug way down (I do) then I think you will be happy with the manifolds. If you think you need a bunch of horsepower when you step on the gas, you will need more than a set of headers to make much of a difference. A big block chevy on alcohol would be great.
     
  4. Jul 23, 2006
    rat_ranger

    rat_ranger New Member

    Joined:
    Jul 11, 2006
    Messages:
    19
    When I swap mine into my cj2 i might cust do some block hugger "headers" so that i can route the exhaust exactly how i want.
     
  5. Jul 24, 2006
    grannyscj

    grannyscj Headed to the Yukon

    Anchorage, AK
    Joined:
    Dec 19, 2005
    Messages:
    1,756
    No such critter.:v6:
     
  6. Jul 24, 2006
    kamel

    kamel Senior Curmudgeon

    Erlanger, Kentucky
    Joined:
    Jun 10, 2003
    Messages:
    892
    And another "Amen" from the choir!

    I have always said that headers add nothing except a little jingle in the pocket of the vendor, and more noise to scare the animals and neighbors.

    Yeah, they use 'em on race engines, but they don't have starters on race engines either, and no one would suggest eliminating the starter on a Jeep.

    I don't believe that any increase in power as a result of a header on an old jeep engine would be measurable. Theoretically, there could be something there, but it would fall off in the rounding error.
     
  7. Jul 24, 2006
    rat_ranger

    rat_ranger New Member

    Joined:
    Jul 11, 2006
    Messages:
    19
    I know. But with access to a laser cutter and tig/mig welders I can order mandrel bent U pipe from jegs or summit and make my own. I was thinking 1inch main tubes to a 2inch collecter which would go into the ypipe which would have 2inch collecter and run it with a 2inch pipe all the way to the rear and mount a muffler all stock like. Won't gain anything over the manifolds, but I can have the exhaust dump right where I want it and have it clear everything.
     
  8. Jul 24, 2006
    66cj5

    66cj5 Jeep with no name

    NorthWest Indiana
    Joined:
    Sep 10, 2003
    Messages:
    2,069
    I think you would have a slight increase in hp (say 5-10, 15 at most) with headers.
     
  9. Jul 24, 2006
    rat_ranger

    rat_ranger New Member

    Joined:
    Jul 11, 2006
    Messages:
    19
    If the headers are built right, Mine will be built more for routing than power gain. I just want to try my hand at it and get the exhaust out of the way and looking different.
     
  10. Jul 24, 2006
    vanguard

    vanguard Guest

    IIRC, there are different headers for CJ5s and flatfenders. Sounds like you've got a pair of CJ5 headers ('69). I'd check the AA catalog and or maybe hedman as well.
     
  11. Jul 24, 2006
    timgr

    timgr Jeepin' Nerd 2020 Sponsor 2019 Sponsor

    Medford Mass USA
    Joined:
    Aug 10, 2003
    Messages:
    20,915
    Another chorus from the choir...
    Headers - hot, noisy, fragile, leaky, bulky, expensive. Strictly race car tech. For a driver or trail rig, you'd be much better off with cast iron manifolds.
     
  12. Jul 24, 2006
    sparky

    sparky done Staff Member Founder

    Toowoomba, QLD
    Joined:
    Sep 20, 2002
    Messages:
    9,067
    X5 or X6 or whatever.

    I want to ditch mine for manifolds but for now they're fine. :)
     
  13. Jul 24, 2006
    jpflat2a

    jpflat2a what's that noise?

    Riverside CA
    Joined:
    Jul 30, 2003
    Messages:
    7,987
    sorry
    I like mine
    they fit like a glove
    from AA for the V6 conversion in a flatty
    I would never run stcok manifolds
     
  14. Jul 24, 2006
    $ sink

    $ sink Gazillians of posts

    Virginia Bch
    Joined:
    Nov 25, 2004
    Messages:
    1,375
    Ok, not for against, but all of you guys getting ready to yank your headers in favor of manifolds, if your headers are beyond saving, consider offering up your head flanges for someone interested in fabing a set.:)
     
  15. Jul 24, 2006
    sparky

    sparky done Staff Member Founder

    Toowoomba, QLD
    Joined:
    Sep 20, 2002
    Messages:
    9,067
    It's in the future. I'll probably look into routing my exhaust like Boyink did on Dutch first. I just don't like the side dump.
     
  16. Jul 24, 2006
    $ sink

    $ sink Gazillians of posts

    Virginia Bch
    Joined:
    Nov 25, 2004
    Messages:
    1,375
    I don't mind the side dump, but then there isn't a rock within 50 miles of my house:rofl: I am thinking of fabbing a set of shorties that lead to single pipes going out under the side. that way all of the tire slung goo is landing on a single (easily replaceable)pipe instead of packing into the back of my collectors
     
  17. Jul 24, 2006
    jpflat2a

    jpflat2a what's that noise?

    Riverside CA
    Joined:
    Jul 30, 2003
    Messages:
    7,987
    my engine/carb are stock, just has headers
    and there is a big difference in performance with the mufflers on or off
    the engine breathes and responds better, fact not fiction
    I don't boulder bash
    ymmv
     
  18. Jul 24, 2006
    wjCJ5

    wjCJ5 New Member

    Joined:
    May 19, 2006
    Messages:
    16
    For the 225 there is only one set of headers and they are the same all the way around. I just modified the body but the only other option that is worth a sh!t is moding the headers to your specs. Don't use the stock one goes forward and the other goes back real pain in the @ss. Good luck
     
  19. Jul 24, 2006
    mpc

    mpc Member

    Vista, CA 92083...
    Joined:
    Aug 18, 2005
    Messages:
    775
    ?? I have two sets of headers for my V6. The old set dumps out pretty far from the frame rail, closer to the edge of the body. The ones I'm repacing those with hug the frame rail much better (so the exhaust system will be less likely to get rock damage).

    I also have some 231 manifolds I could use, but I think the exhaust work from a shop would end up costing me more if I went that way.
     
  20. Jul 24, 2006
    jpflat2a

    jpflat2a what's that noise?

    Riverside CA
    Joined:
    Jul 30, 2003
    Messages:
    7,987
    the V6 CJ5 headers really won't fit a flatty
    not without a lot of work to the body or cutting of the fenders
    or severly modifying the headers
    that's why the AA headers are a good choice
    I had to cut 1" out of the rear tube and reweld on the drivers side
    and that's only because I didn't want to cut the fenders
     

Share This Page

New Posts