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twin wastgates

Discussion in 'Turbo Tech Questions' started by fastgp, Aug 18, 2008.

  1. fastgp

    Joined:
    Mar 16, 2008
    i seen a couple of cars lately running twin wastgates on single setups. what is the purpose/benefit of running dual wastegates. i think it would be to help bleed of some boost on the high(+30) boost app. but i thought i'd ask.
     
    fastgp, Aug 18, 2008
    #1

  2. pontiac_baron

    Joined:
    Aug 3, 2007
    indeed....less boost creep

    I like the idea for reliability
    A sticking spring could be awful dangerous...with two, you have a backup
     
    pontiac_baron, Aug 18, 2008
    #2

  3. Robert1320

    Joined:
    Jun 20, 2005
    Most times it is because they kept an old gate from a prior build and they bough another instead of getting one correct sized one.
    You need less gate for more boost and more gate for less boost.
     
    Robert1320, Aug 18, 2008
    #3

  4. Ackbar00

    Joined:
    May 9, 2003
    Bingo. That is why I did it on my old setup.
     
    Ackbar00, Aug 18, 2008
    #4

  5. svooh

    Joined:
    Oct 6, 2004
    No you guys have it all wrong... the second gate is a dummy gate with a fogger nozzle inside it. Hook both up with braided line and you never can tell. LOL
     
    svooh, Aug 18, 2008
    #5

  6. Lil Big Mec

    Joined:
    Aug 12, 2007
    I think you are thinking of dual blow off valves. What would be the point of dumping nitrous/fuel into the exhaust?
     
    Lil Big Mec, Aug 19, 2008
    #6

  7. Robert1320

    Joined:
    Jun 20, 2005
    It makes really cool flames out the exhaust.
     
    Robert1320, Aug 19, 2008
    #7

  8. ash

    Joined:
    Jan 23, 2006

    dumping the hi speed fuel from the mechanical injection does the saME THING.... :2thumbs:
     
    ash, Aug 24, 2008
    #8

  9. Turbo_Baer

    Joined:
    Dec 21, 2003
    me too. one 38mm was just about enough for my p67. now with a larger motor and gt80r turbo, i felt i needed more gate to keep the boost lower. plus its $200 extra instead of buyin new flanges and re working the old one. just added a second to the other cross over pipe and was done. plus 2 38mm should outflow one 44mm
     
    Turbo_Baer, Aug 24, 2008
    #9

  10. bet on black

    Joined:
    Aug 12, 2005
    i am going with dual gates to add some safety margin. i know it is not as likely to have a gate stick shut if it is a quality unit, but with two of them , the chances of popping the motor from overboosting due to a wastegate failure are reduced.
     
    bet on black, Aug 25, 2008
    #10

  11. jay_rich

    Joined:
    Feb 14, 2008
    Baaahahah I was thinking the same thing.

    Jay
     
    jay_rich, Aug 26, 2008
    #11
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