1. The Turbo Forums - The discussion board for both hard core and beginner turbocharged vehicle enthusiasts. Covering everything from stock turbocharger cars, seriously fast drag racers, boats, motorcycles, and daily driver modified turbo cars and trucks.
    To start posting in our forums, and comment on articles and blogs please

    IF YOU ARE AN EXISTING MEMBER: You can retrieve your a password for your account here: click here.

GT42 Large frame turbo

Discussion in 'LS1, LS2, LS6, LT1, SBC Turbo and other GM Specfic Turbo Tech' started by slowolds, Feb 19, 2008.

  1. slowolds

    Joined:
    Feb 2, 2008
    what are they capable of making hp wise? are they a good turb o or are they junk? thanks
     
    slowolds, Feb 19, 2008
    #1

  2. FastDriver

    Joined:
    Jun 28, 2004
    I'd say that what they claim isn't far off - 1100 hp. The GT42s with 76mm compressors have made just over 1000 rwhp in several combinations with manual trannies that I've seen. It's definitely a good turbo. Garrett doesn't make crap. They got quite a few variations, too. 74 vs. 76mm compressors, 94 vs. 102?mm turbines. T4 or T6 and ball-bearing vs. non-bb.

    Chris
     
    FastDriver, Feb 19, 2008
    #2

  3. Robert1320

    Joined:
    Jun 20, 2005
    They are good turbos the S400 75 will out flow it.
     
    Robert1320, Feb 20, 2008
    #3

  4. FastDriver

    Joined:
    Jun 28, 2004
    I beg to differ. From what I gather, the 75mm S400 is good to about 1000hp. I've seen the GT4276 run over 1000 to the wheels, and I've seen standard GT42s make over 900 rwhp. If anything, it's the other way around. S400s are affordable, though.

    Chris
     
    FastDriver, Feb 20, 2008
    #4

  5. Robert1320

    Joined:
    Jun 20, 2005
    Really depend on the size of the motor.
    A lot of "higher hp" turbo work great on hondas and supra
    but can not re-create the numbers due the the larger cid
    motor there are trying supporting.


    And the GT42 comes in several flavors.
     
    Robert1320, Feb 21, 2008
    #5
Loading...
Similar Topics - GT42 Large frame Forum Date
Which turbo for a 5.3- GT42-76 or Precision GTSHP PT-76 CNC Ported or PT88 LS1, LS2, LS6, LT1, SBC Turbo and other GM Specfic Turbo Tech Feb 17, 2012
Aussie 308 + methanol + GT42 = what spark plug LS1, LS2, LS6, LT1, SBC Turbo and other GM Specfic Turbo Tech Feb 7, 2008
Twin GT42 74mm Turbo TA *PIC'S* LS1, LS2, LS6, LT1, SBC Turbo and other GM Specfic Turbo Tech Nov 1, 2006
Loading...