Originally Posted by dvw
Originally Posted by Chargerfan68
Just received my new Crower 4340 BB crank and was little surprised to not see any profiling of the leading edges of the throws. I will be using a crankscraper, and vacuum pump….but how important is some radiusing to the leading edges in an engine with these systems.

572” 7500 rpm. Good scraper with 13-14” vacuum.

Thanks.

What heads ar you using to get the power range up to 7500?
Doug


I have 572-13 prepped by Dwayne Porter.

1.50 60Ft. , 10.75@ 127MPH Hauling 3900 LBS.