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t3/t4 downpipe size question

Discussion in 'Turbo Tech Questions' started by actmobmar, Oct 13, 2010.

  1. actmobmar

    Joined:
    Oct 9, 2010
    hello everybody, i have a 383 in my '69 camaro that i am in the process of putting on a pair of t3/t4 hybrids, set up to blow thru a qft blow thru 750. i was wondering if it was worth it for me to run 3" downpipes or would 2.5 be fine, the room is at a premium under the hood, and i think i would need some kind of adapter to go to 3", thanks!
     
    actmobmar, Oct 13, 2010
    #1

  2. Skatefreak

    Joined:
    Jan 6, 2010
    Depends.. What is your HP Goals?
     
    Skatefreak, Oct 13, 2010
    #2

  3. actmobmar

    Joined:
    Oct 9, 2010
    650 hp to 750hp
     
    actmobmar, Oct 13, 2010
    #3

  4. Skatefreak

    Joined:
    Jan 6, 2010
    2.5" on twins will easily make that..
     
    Skatefreak, Oct 13, 2010
    #4

  5. mnm99

    Joined:
    Aug 27, 2008
    Thats what I have, but can't tell you what HP. There not hooked up yet. LOL
     
    mnm99, Oct 14, 2010
    #5

  6. tt350chevelle

    Joined:
    May 25, 2006
    355 cid, pair of t3\t4 turbos, maxed out the v trim compressors @ 19 psi and made 710 rwhp, through 2.5 inch pipe right from the turbine housing all the way to the rear bumper.

    Brad J.
     
    tt350chevelle, Oct 14, 2010
    #6

  7. actmobmar

    Joined:
    Oct 9, 2010
    nice!!! now i have to figure out what headers to use, my block is at the machinist rite now for a bore to .040, the engine lasted 12 years running 7 psi of boost from a weiand blower
     
    actmobmar, Oct 15, 2010
    #7
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