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S475 on LQ4, how big of waste gate for low boost?

Discussion in 'Turbo Tech Questions' started by milkovich, Jan 9, 2014.

  1. milkovich

    Joined:
    Aug 8, 2007
    I have a 45mm gate, would that be enough to hold the S475/96mm to 10-15psi?

    If I have to, I'll just buy another 45 and run them just off the manifolds, but if I can get away with one gate in the merge, I want to save some money.
     
    milkovich, Jan 9, 2014
    #1

  2. M&M Turbochargers

    Joined:
    Jan 31, 2011
    you could try it watch for boost creep though

    wastegateplacement.jpg #ad
     
    M&M Turbochargers, Jan 9, 2014
    #2

  3. ashford

    Joined:
    Nov 24, 2008
    a single jgs 50mm could not hold down boost on my 383w, same turbo on a 6.0ls same wastegate did.
     
    ashford, Jan 9, 2014
    #3

  4. ss496

    Joined:
    Jun 15, 2004
    -older 44 mm JGS mounted at 90* angle
    -really mild 383 chevy (maybe ~300 hp N/A)
    -75 mm S400, 87mm 1.10 A/R
    -holds down to 5 PSI of boost no boost creep
     
    ss496, Jan 9, 2014
    #4
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