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Homemade headers

Discussion in 'Early CJ5 and CJ6 Tech' started by oldjeep, Mar 23, 2005.

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  1. oldjeep

    oldjeep Sisyphus at work

    Hope they don't leak. Made them to run down next to the outside of the frame. My fenderwell headers keep getting crushed and there doesn't seem to be anything else in the aftermarket that fits
     
    oldjeep, Mar 23, 2005
    #1
  2. JohnyJeep

    JohnyJeep BLOWING A XING NEAR U@2AM

    Wow those are nice.
     
    JohnyJeep, Mar 24, 2005
    #2
  3. mb82

    mb82 I feel great!

    nice.
     
    mb82, Mar 24, 2005
    #3
  4. Hawk62cj5

    Hawk62cj5 Captain of OldSchool

    Good job ,,,,can I order a set for a F head :D
     
    Hawk62cj5, Mar 24, 2005
    #4
  5. lynn

    lynn Time machine / Early CJ5 HR Rep Staff Member

    They look good Chuck... but something in the back of my mind makes me think there is some important reason that tubes on most headers are all the same length up to the point where they are collected or join. :?

    Since the turns on your tubes are not sweeping, won't you get hot spots where the shorter pipes meet the longer one?? Or is that why it's reinforced in that section...

    I don't know anything about header design, these are questions that just popped into my head... :D
     
    lynn, Mar 24, 2005
    #5
  6. oldjeep

    oldjeep Sisyphus at work

    The only reason for equal length tubes is that it equalizes back pressure which gives you more horsepower.
     
    oldjeep, Mar 24, 2005
    #6
  7. lynn

    lynn Time machine / Early CJ5 HR Rep Staff Member

    Ah-ha, that's it... thanks for the explanation. :)
    Keep us posted on how these perform for you!

    These are the ones you made starting with old header flanges and tube stubs, right?
     
    lynn, Mar 24, 2005
    #7
  8. oldjeep

    oldjeep Sisyphus at work

    Yup. Still have to build the other one tonight, then figure out how to leak test them before paint.
     
    oldjeep, Mar 24, 2005
    #8
  9. Hill

    Hill Member

    I love it! That is just the sort of thing I would do!! Right down to the hunk of square tubing in the middle!! You should come up some line about pressure fluctuations, and resonant harmonics to explain why you used the square tubing.

    Excellent!
     
    Hill, Mar 24, 2005
    #9
  10. Mcruff

    Mcruff Earlycj5 Machinist

    Chuck can you hook an air hose to it, you could use a piece of hose, a clamp and a plug with a NPT tapped hole in it for the air fitting.
     
    Mcruff, Mar 24, 2005
    #10
  11. Warloch

    Warloch Did you say Flattie??? Staff Member

    Shocked you Navy Guys didn't come up with this - You know how they test a SUB to see if it leaks, the same as a Tank. You fill IT with water and see where she leaks.

    BTW - have seen guys do that as well with headers.
     
    Warloch, Mar 24, 2005
    #11
  12. Mcruff

    Mcruff Earlycj5 Machinist

    Submarine hulls are pressurized with air to see if they leak!!;)
     
    Mcruff, Mar 24, 2005
    #12
  13. Patrick

    Patrick Super Moderator Staff Member

    That surprises me a bit. I would think it would be a better test to pull a vacuum on it, and see how it seals from the outside in..
     
    Patrick, Mar 24, 2005
    #13
  14. Mcruff

    Mcruff Earlycj5 Machinist

    Modern subs have a pressurized double hull, they account for every cubic foot of air used, if more is used than recorded there a leak somewhere. A friend of mine served on the USS Dallas, they put her in dry dock years ago and tested the hull by pressurizing it and sweeping the outside with wooden handles to find the pinhole leak, it cut the handle in 2 pieces when the handle passed over the leak.
     
    Mcruff, Mar 24, 2005
    #14
  15. mb82

    mb82 I feel great!

    i thought that was a rumor. that is simply amazing that can happen.
     
    mb82, Mar 24, 2005
    #15
  16. Warloch

    Warloch Did you say Flattie??? Staff Member

    Info is probably old ;) Like me. My (let me think) Great Uncle told me that was how they checked them, but that was during WWII when he worked in ship yards back east.
     
    Warloch, Mar 24, 2005
    #16
  17. jhuey

    jhuey Michigan Jeeper!

    Just thinking, when you get the other one done bolt them together flange to flange with a gasket plug one side and rig a air fitting to the other side squirt bottle of soap and there you have it.
    Joe
     
    jhuey, Mar 25, 2005
    #17
  18. oldjeep

    oldjeep Sisyphus at work

    I like it. Simple and only requires a bike inner tube. Should have the other one finished Saturday, started last night and really screwed it up a couple times. (Seems to happen as soon as you think you know what you're doing)
     
    oldjeep, Mar 25, 2005
    #18
  19. jd7

    jd7 Sponsor

    Worked in muffler shop in high school. The guy that owned it built headers for few of the hot rodders and racers, would just mount em up crank it put something over outlet to create backpressure listen to it for leaks and weld em up as he found em.
     
    jd7, Mar 25, 2005
    #19
  20. speedbuggy

    speedbuggy Looking for a Jeep now

    I was thinking along the same lines. Seems to me it'd be the easiest way.

    BTW nice job on the headers!
     
    speedbuggy, Mar 25, 2005
    #20
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