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Thread: Question about headers

  1. #1
    Senior Member EXPERT BUILDER
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    Question about headers

    I'm Building a new car, Now I was going to go with the pipes to a collector and exit them on each side right behind the front wheel as many of you guys do. Question is about the zoomie headers I is see alot of cars have them to. My Question is there a performance difference ? I am running a 540ci blown injected motor on gas to start, then switch to alcohol, If that matters.. Any insite to this would be great. Thanks Mike
    Blowninjected 540 - when is going fast, Fast enough ?????

    http://www.racingjunk.com/profile/182079

  2. #2
    Senior Member RACING JUNKIE
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    If you make the primaries and collectors big enough, there's minimal difference.

    The big advantage with a collector is being able to throw a set of mufflers on it if the rules change.

    2-3/8 or 2-1/2 primary pipes are a must. 4.5-5" collector as well.
    -WJ Birmingham

    OneBadGMC.com

  3. #3
    Senior Member RACING JUNKIE
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    X2 what WJ said, a blower does not like back pressure, if you can't get it out, you can't put it in, if you're going to swith to alcohol, i would go with zoomies, because with alcohol you're going to be putting approx 66% more fuel thru the motor.

    JMO

    Zip.

  4. #4
    Senior Member MASTER BUILDER
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    x3 as above mentioned especially with alcohol zoomies with a 2 1/4 to 2 1/2 pipe id would be best for a blown application
    to finish first: first you have to finish!

  5. #5
    Senior Member EXPERT BUILDER
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    Zoomies it will be thanks for all your replies, Nice to have a place to go for these types of questions and get a honest answer with other people backing it up. Thanks again Guys. Mike
    Blowninjected 540 - when is going fast, Fast enough ?????

    http://www.racingjunk.com/profile/182079

  6. #6
    Senior Member RACING JUNKIE
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    I would give Tim at The Fab Shop a call and discuss with him. He has done a great deal of dyno work with traditional hearders with collectors and merge collectors as well as zoomies.

  7. #7
    Senior Member EXPERT BUILDER
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    Quote Originally Posted by shawnp
    I would give Tim at The Fab Shop a call and discuss with him. He has done a great deal of dyno work with traditional hearders with collectors and merge collectors as well as zoomies.


    would you have his number ? Thanks Mike
    Blowninjected 540 - when is going fast, Fast enough ?????

    http://www.racingjunk.com/profile/182079


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