whats the down side to a cross drilled crankshaft

Old 01-21-2009, 08:13 PM
  #1  
badbug3
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Default 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 .
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Old 01-21-2009, 09:12 PM
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TheYellaBrick
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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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Old 01-23-2009, 10:26 AM
  #3  
Tod74
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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
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Old 01-24-2009, 03:06 PM
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mopar1962
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Default 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
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Old 01-24-2009, 05:24 PM
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Racefab57
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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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