How much can a OEM crankshaft handle???

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Thread: How much can a OEM crankshaft handle???

          
   
   
  1. #1
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    How much can a OEM crankshaft handle???

    I have been running OEM crankshafts and never had a issue.. I've been trying to push as much as I can out of this package.. My builder advised me into getting a billet crankshaft because he feels I am pushing this stock crank past is tolerance.

    Under your personal experiences where did a OEM tap out and fail.


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    Depends on who you talk too lol

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    The stock crank will take anything you can put to it. Billet cranks have the same sized journals and actually less overlap on the Crankpin to mains (due to the crankpins being farther away from the centerline).

    There may be benefit to increasing the displacement with a bigger crank so that you can make more power, but the strength of the crank itself isn't going to be the driver. A bigger stroke will do wonders for your leave, specially with a big guy. Much easier to drive NA out of the hole or with just a small amount of spray as opposed to leaving on an 80 shot.

    I wouldn't even consider a weld-up crank for anything other than a lightly loaded NA application. People do it, but people also snap them bitches like a toothpick.

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    Sportbikeryder you are exactly the fella I was looking for a reply from..

    I am leaning towards a bigger crank to help with getting me moving out the gate. But I will try and squeeze as much as I can out of what I have before I switch

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    Billyvose say he h a s stock crank bikes running 7.0 6.9

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    I've seen some stock crank bikes do it with a turbo too :-)

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    Ok... I have been so lucky with this setup I hate to change it. 2008-2012 on same bearings. The #2 and #3 journals had the color starting to rub off the bearing. That's it. Its a Gen2 crank. Changed bearings and upgraded a few things and closed her back up. We'll see what it holds..... Lol

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    Hmm, I wonder, whatever happened to Big J's Gen2 crank? How did it hold up when moving out the gate?

    Last edited by RushHavoc; 07-13-2017 at 12:30 AM. Reason: Missed a comma.
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