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Thread: whats the down side to a cross drilled crankshaft

  1. #1

    whats the down side to a cross drilled crankshaft

    im in the market for a 427 bbc gm crankshaft for an 8000 rpm application and need to know if the non cross drilled truck cranks were a better choice than the cross drilled nitrided gm hot rod cranks .

  2. #2
    Senior Member RACING JUNKIE TheYellaBrick's Avatar
    Join Date
    Mar 2008
    Emmett, Idaho
    I'm not a GM guy but you might mention what kind of vehicle it's going in, and if carbed or power added.
    to those who

    God Bless our folks in uniform
    "We the People, have your backs"

  3. #3
    Senior Member RACING JUNKIE
    Join Date
    Sep 2007
    NO on the cross drilled go to speedtalk and do a search there is a bunch of info as to the reasons FOR And against

  4. #4

    cross drilled crank

    They tend to weaken the crank a little,mopars use a full groove bearing but I think chevies prefer a 1/2 groove due to the fact they tend to oil the top end first,just my opinion

  5. #5
    Senior Member DYNO OPERATOR
    Join Date
    Nov 2006
    Cross drilling thro's oil out away from the bearings.( thats an old trick to crossdrill) People I know DOMT do it anymore!!DR.

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