Crank drilling, why bother?

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12-04-2009, 11:05 PM

#16

ptuomov

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Quote:

Originally Posted by GregBBRD

You got it. Porsche had to completely redesign the cranks for the 944GTRs, because of this problem....once they started running them at higher rpms. They are "surface" drilled, not "center" drilled.

How do you surface drill a stock crank? It already has the T-cross drilling. Surface I-drilling or surface V-drilling can't be done on a finished stock crank, right? That's for an aftermarket crank only. All you can do to a stock crank is a T-to-T web drilling that connects it all. Right?

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