whats the down side to a cross drilled crankshaft

[badbug3]

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 .

[TheYellaBrick]

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

[Tod74]

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.php?t=7054&highlight=cross+drilled+crank

[mopar1962]

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

[Racefab57]

Cross drilling thro's oil out away from the bearings.( thats an old trick to crossdrill) People I know DOMT do it anymore!!DR.