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.

Last edited by Chargerfan68; 01/30/23 01:34 AM.
1.50 60Ft. , 10.75@ 127MPH Hauling 3900 LBS.