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short header question

  1. #1
    Senior Member sandeggo's Avatar
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    Default short header question

    i'm building my headers and was wondering how far past the inside edge before the transom do they have to overhang when running them wet? Right now they are about 8" from the inside lip of the transom. does that much water come out of them or is it mostly steam?

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  3. #2
    BRM
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    Default headers

    headers are best when they are erect

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    back of boat within 4 inches IMO...

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    Senior Member W.O.T's Avatar
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    Should Be Slight Steam Always. If You Have More Water Than That ever Coming Out Of Headers Your Going To Have More Problems.

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    Senior Member sandeggo's Avatar
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    so i should just extend them to just past the lip on the inside of the transom

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    Quote Originally Posted by sandeggo View Post
    so i should just extend them to just past the lip on the inside of the transom
    bitchin! throw up a side profile. im thinking about the easiest way to fab up some custom shorty upswept headers for twin turbo.

  9. #7
    Senior Member sandeggo's Avatar
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    This is a sbf sprint car kit with LS flanges

  10. #8
    Member bubbledeck55's Avatar
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    Default headers

    i have a set of bassets that look pretty close to that length and they do fine running with the bilge. most of the water gets tossed out the back from the momentum

  11. #9
    Senior Member desrtrat256's Avatar
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    That looks buitchen! out of curiousity why are you going with a carb and not the stock efi?

  12. #10
    Senior Member sandeggo's Avatar
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    Quote Originally Posted by bubbledeck55 View Post
    i have a set of bassets that look pretty close to that length and they do fine running with the bilge. most of the water gets tossed out the back from the momentum
    thanks thats what i was looking for. i think my 750 bilge would keep up if i put a hole in the bottom (knock on wood)
    Last edited by sandeggo; 02-25-2011 at 10:34 AM.

  13. #11
    Senior Member sandeggo's Avatar
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    Quote Originally Posted by desrtrat256 View Post
    That looks buitchen! out of curiousity why are you going with a carb and not the stock efi?
    carb is just simple. efi is something that i would rather not deal with out at the river. more to go wrong, and more complex fuel setup. i am trying to keep it as simple as can be.
    My old small block was toast. cheapest cost to rebuild the Gen1 was 2200.
    I needed to get my carbs redone (600) and a new fuel pump(150). all said and done i was facing about 3k for an old worn out 2 bolt SBC. This 2007 motor was 500 bucks complete. It has barely any miles on it and puts out more horse and torque than the old motor. Its also lighter. I sold all my old smallblock stuff and can do the motor plates and everything myself so the cost of the swap is kind of a wash. Free aluminum, and just my time. seems like a no brainer to me. If I pop this motor i go back to the junkyard with 500 bucks and get another one. 12 bolts later there's a new motor in the boat.
    LS motor $500
    MSD 340
    Vic intake 300
    Carb .... havent bought it yet
    SBF header kit and LS flanges 160
    fuel pump 100
    oil filter relocator 50
    metal for rail kit and mounts free
    pto 70
    total this far about 1500 bucks.

    Gen 1 small block parts were sold for 1700-ish through craigslist
    Last edited by sandeggo; 02-25-2011 at 10:32 AM.

  14. #12
    mo balls than $cents$ IMPATIENT 1's Avatar
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    Quote Originally Posted by sandeggo View Post
    This is a sbf sprint car kit with LS flanges
    now that's gna look niceeeeeeee good job!

    Dare to be different, if it turns out great you can claim you planned it that way.

    Jetboatperformance.com

  15. #13
    Senior Member sandeggo's Avatar
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    Quote Originally Posted by IMPATIENT 1 View Post
    now that's gna look niceeeeeeee good job!
    thanks i think it looks pretty good. the header kit worked out well too because the drivers side header primary tubes were about a inch longer than the passenger so it matched the offset on that head. the collectors are the same distance from the transom.

    About what size are weep holes and what size bungs for the water lines?
    Last edited by sandeggo; 02-25-2011 at 07:30 PM.

  16. #14
    Senior Member Daddy B's Avatar
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    It will make more of a exhaust carbon water mess in the transom having them short but I personally think they sound better, most baffles are 4 inches long for noise police.

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