posted October 02, 2003 04:57 PM
My experience is that the stock forged cranks usually break when raced,probably because they are older forgings and have alot of miles on them and most came out of truck or high performance applications and were abused.I use cast cranks all the way to 7500 rpm and have not broken one yet.
posted October 02, 2003 07:35 PM
stock forged are 1053 metal they arent as good as the cheapes 5140 aftermarket steel out there.
I have seen a half dozen oem steel breaking in stock cars. I think its because they dont flex like a cast crank does.
posted October 03, 2003 01:23 AM
I gotta agree with these fellas above. I've had GM forged cranks go to crapp in less time than the cheapo cast steel boogers.