TwinTurbo.NET: Nissan 300ZX forum - That is wierd...most major crank manufacturers champer
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Subject That is wierd...most major crank manufacturers champer
     
Posted by Kyle(Houston) on July 02, 2006 at 7:10 AM
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In Reply To Maglito's new SGP motor wiped the #1 rod bearing within posted by Ash's Z on July 01, 2006 at 04:09 PM
     
Message Chamfering the journal oil ports = why even bother running oil.. That process compromises the journal face area right where you need it most.

Do a search on Google for "champered oil holes" and you will find that most crank manufacturers champer the oil holes in the crank for better oil flow to the bearings.

Just two quick examples:

http://www.440source.com/crankshafts.htm

"These are rated to easily handle 1000+ horsepower. Nitrous? Blower? No problem. The only thing stronger than these 4340 cranks is a solid billet crank, which is rated to 2500+ horsepower and will run you about $3000+. As you can see in the above pictures, the quality and workmanship on these is amazing. All our Platinum Series cranks have fully profiled counterweights to help reduce windage and cut through the oil film in the engine. They all feature .125" fully radiused journal fillets and fully chamfered oil holes as standard features."

http://www.kec.com.au/engines_engine_quick_reference.html

# CHAMFER OIL HOLES

Increases oil dispersion for longer bearing life.

So I am not sure where you think chamfering is a bad thing?

Kyle "Grumpy Bear" Puckett
Import Parts Pro
Phone: 281-288-0700
AIM: KyleatIPP
Yahoo: KyleatIPP

     
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