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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
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    I'm not a GM guy but you might mention what kind of vehicle it's going in, and if carbed or power added.
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  3. #3
    Senior Member RACING JUNKIE
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    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

    http://speedtalk.com/forum/viewtopic...+drilled+crank

  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
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    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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