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cgallamore

Pedigreed Bulldog
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Posts posted by cgallamore

  1. I nursed it to salt lake city, was quickly informed they needed a copy of the paid receipt, wich I produced, I was informed Mack wouldn't pay any on the repair

    So I headed for Mackpro, hit a deer along the way, knew I shoulda put on a cow catcher a couple years ago.

    Can't wait to see my fresh paint and cow catcher

    And there was no problem with Mack warranty on the vgt actuator

  2. I had similar problem, took a while to pinpoint the problem

    I started with running the overhead, O rings, wireing and such, it is affected by oil pressure

    The next thing is boost

    Should be making 15 to 20lbs of boost at 1600 rpm's on 6% grade

    Engine fan is around 25 brake horse power

    After going through all that, my engine brake was still terrible.

    VGT actuator went out, got that replaced and new exhaust manifold gasket

    Boost during engine braking went from 5psi to 18psi

    Made huge difference, was going off 6% like you, now I go off the same hills grossing 75,000 in 6th or 8th fanning the brake occasionally in 8th near 40 mph

    Hope this helped

  3. Ran a load of shelving 38,000 lbs from san Diego to just north of bakersfeild

    Come over the pass 4200 ft, making 31/32 psi boost

    Going off the grapevine 6% for 6 miles could run 2 gears higher and never touch the brake, making 15/17 psi boost

    Never would make over 5psi before

    I think that Vgt acuator has been a problem all along but no way to tell, who wants to throw 2 grand at a part you don't know if it's bad or not

    Just cruzzin around out west wiping the smiles off large cars

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