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j_martell

Pedigreed Bulldog
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Posts posted by j_martell

  1. A few TDI nerds have been reporting over speed of the turbo and something known as "boost creep" as a result of gutting the exhaust systems in favor of free flowing straight pipes....

    Basically with nothing to hold the turbo back, an over boost condition occurs, and extremely high (dangerously) turbine speeds.....

    I know, little motors vs big motors, but food for thought.

    I'd imagine however, the 4" down pipe would choke it back a little anyway

  2. Not sure of the Cummins but I'm pretty sure duramax from a few years ago came with exhaust brakes, never heard of actual compression brakes on either.....our only duramax truck is gone otherwise I'd check it our first hand.....

  3. Throttle is likely ether a varible resistance switch or potentiameter (sp?). To check a variable resistance switch you need a multimeter set to ohms (not sure the range) and hook the leads to the throttle wires and test resistance from idle to WOT....some one here might have the values for high/low.....infinite resistance indicates an open circuit.....

  4. Generation. Can't recall the years but they are both granites. The numbers on Newer granites (for sure, older ones too maybe) are:

    7 - axle forward

    8 - axle back

    1 - mack engine

    2 - vendor engine (?)

    The last number is the number of axles

    ie my 2011 GU813 has a sba an mp7 and is a triaxle chassis.

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