exhaust and jetting question

Discussion in 'Technical' started by borjawil, Sep 27, 2011.

  1. borjawil

    borjawil Member

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    So ordered a header for my inline 6- i have a one barrel carb on it. The exhaust will be a dual exhaust and I was just wondering what mufflers I should go with? Not sure if anything will make a great difference but looking for something cheap since im on a budget.

    Also what about the jetting and setting on the carb? I mainly work on bike and I know that changing exhaust on a bike requires rejetting. If i do need to rejet where can I find jets for my carb? Should I up grade to a different carb?

    My last question is about exhaust pipe lengths. If I wanted a side exit on either side would both sides need to be the same length? Again this is the case with bikes.
     
  2. baddad457

    baddad457 Member

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    Wait til the exhaust is done, then run it a week and then pull the plugs and read them to see if any rejetting is needed. Car's aren't as sensitive to changes as a bike would be. Pipes don't need to be the same length either, but you might want to run an equalizer between the pipes to mellow the pulses and tone.Just me, but two 3 cylinder exhausts have always sounded like crap if it's a split header.
     
  3. Mad_Cow

    Mad_Cow Member

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    I put two cherry bombs on my I6 right in the tranny tunnel,with pipes coming out right before the tires. it was just y piped, but dang it sounded awesome, the best 6 i've heard. I think a x pipe would make it sound perfect. but baddad is right. you want it to sound like full six cyls on each side, not just 3. and unless you went from a 1.5" big muff to 3" straights, the car will barely notice.
     
  4. borjawil

    borjawil Member

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    mad cow how was it y piped if it had two mufflers and two different pipes? maybe im misreading it? was your exhaust stock and you had a y pipe off it making it into two? Mines a split header.

    Whats an equalizer? Is it the same thing as an X pipe? Better to just get a y pipe and have a single muffler? Cherry bombs work ok or should I go with something else?

    heres a y pipe i found on ebay. it says for single to dual could i do a dual to single?
    http://cgi.ebay.com/ebaymotors/ws/e...eName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649
     
    Last edited: Sep 27, 2011
  5. Mad_Cow

    Mad_Cow Member

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    I y piped my stock manifold into two tubes into two diff cherries that sat right under the driver and passenger seats. then the pipes came out right in front of the tires.

    x pipe and equalizer are essentially the same thing.

    And no, the point of getting split headers is to have better flow and true dual exhaust. I think cherrys work just fine, they have great flow and great sound.

    For you a y pipe is not the way to go unless you y each of the tubes and have four coming out. and going from dual to single would only restrict you, unless your single pipe was like a 3.5".(which could look pretty cool i think comin right out the center of the back.)

    I'm also speaking from a limited knowledge base, but have had a few years of experience. Unless You're planning on rodding your six out. Split headers and medium sized tubes are all you need to worry about. The rest is all personal pref, on sound and looks. I believe that an x pipe to two cherries would produce the best sound,and highest flow for the cheapest money. Where the tubes come out is all up to you.

    But if you are planning on rodding it out. slammin extra money on a REAL high flow mufflers, 3.5" pipes, and an X or H, would be the way to go. Could Y em(one to two) so you'd have four big pipes after the muffles... but the again not really sure how much that would help besides looks...
     
  6. maverick75

    maverick75 Gotta Love Mavs!

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    Straight through mufflers sound like crap on these inline 6s, there's a bunch of people who like them. But then again there's a bunch of people who like tractor sounds.

    I've run a glasspack, magnaflow, Bullit homemade muffler, CherryBomb Turbo II muffler and a 40 series flowmaster.

    By far the chambered mufflers are the best. The Cherrybomb Turbo II was my favorite, nice cruising sound but when you go WOT it's loud with a nice tone. And it was the cheapest one, around $20 at autozone.
     
  7. maverick75

    maverick75 Gotta Love Mavs!

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    What? A Y would work if he wanted to merge the two collectors together.
    It would promote velocity and these sixes dont rev high enough for it to cause a restriction.



    There's only small headers for the inline 6s. Which are 1.5"
    There's no medium sized ones or large ones, even the Hooker racing ones are only 1.5"

    A 200/250 six would never need 3.5" pipes, even under a turbo application. One would be suffice.
     
    Last edited: Sep 27, 2011
  8. Mad_Cow

    Mad_Cow Member

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    I don't know the technicals exactly. just vague wives tales that say bigger is better flow, better flow is good unless you need back pressure for turbo or your car is touchy, which early models really arent. I don't know anything about what they sell or make for inline six's never done the research. And I know a y would work to put them together, but i thought that it would only cause restriction unless you used a bigger outlet. putting two 1.5's into a 1.5 looses the point of going wiht the split in the first place... and 1.5 plus 1.5 equals 3.0 so i was thinking hte only way to not cause a restriction and put a Y in would be a 3.0 or bigger outlet. Thank you for correcting me though.. .like i said I know little, and have had minor experience with exhaust. and all of it has been with the late model 5.0L so.. sorry for the misinformation.
     
  9. Mad_Cow

    Mad_Cow Member

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    I was talkin bout the tubes comin off the headers. I mean stepping em up supposed to help right? or does it not really matter?
     
  10. borjawil

    borjawil Member

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    so should i go with a y or a crossover/x? what if i did both? just wondering...
    also the headers i got says they are 2.25in- got em from classic inlines.
     
    Last edited: Sep 27, 2011
  11. Mad_Cow

    Mad_Cow Member

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    it's up to you really. just gotta process all the info. if you were to Y right at the manifolds You wouldn't be able to use an X and if you Used an X to equalize, then put a Y after You didn't really need to equalize. but it's really up to you, and to budget. Mostly probably to budget. But a Y would save a little if you got in cheep. only one muffler, and half the pipe. An X sounds/ looks cooler, and to me, which is more then likely wrong. Seems to get the best bang for your buck out of the split header you have. Why get a split header to have two pipes just to put em back together? if you wanted one pipe why not get a single? but then again maybe there's no diff and i'm just blowin smoke.
     
  12. Mad_Cow

    Mad_Cow Member

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    that's what i found to be the great thing about these cars. Nobody will tell you how to do it. every single one is custom in some way shape or form, you'll never find two the same, although you will never find a bolt on that has detailed instructions.... It's completely and utterly up to you... but you also have to do the work. I love it. do what ever you want. Heck put four x's and six Y's on and come out with five pipes on the right and seven on the left. It don't matter jsut know what you want. and if having exhuasts pipes that corrolate to prime numbers isn't it.... then don't put four x's and six y's on...
     
  13. Craig Selvey

    Craig Selvey Indiana State Rep - MCCI

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    Also figure in that the original poster wants to exit the pipe before the back wheels. There is "sound"...and there is "noise". I predict lots of headaches in your future. Not from the fumes...put from the drone of a "noise".
     
  14. baddad457

    baddad457 Member

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    A single 3 to 3.5 pipe would likely sound better than two individual smaller pipes with no equalizer. The big diesels are that way, the bigger the pipe, the mellower the sound will be coming out.
     
  15. borjawil

    borjawil Member

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    craig- why would it be noise? Im planning on running the split header to an "x" connector and out through cherry bombs or glass packs
     

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