handle? I have heard that all LT1 Fbody cranks are cast, but can still hand 500hp. Anyone?

 

Yes they are. They are also about the best SBC OEM cast crank GM has ever made. With some cleaning up of the casting marks and work to make them cut thru the oil in the crankcase better they will make a great crank for a 355.

430rwhp is about 500hp at the flywheel and yeah they should be able to take that easy.

Bret

 

The LT1 uses a nodular iron cast crank. Nodular iron is a process of aligning the iron particles when they are being cast, grouping them tighter together for more strength. It's cheaper to make than a forged crank of course.

 

486 rwhp, 615 torque on a bolt onspray car 96,000 miles

 

My buddy is running a 355 with a cast crank and 2 bolt mains. He's running 10.3 on a 150 shot and 11.4 on the motor. I'm pretty certain I'm using a cast crank in the 355 I'm collecting parts for.

Frank

 

ls1speed builds a 355 lt1 engine with the stock crank thats polished and refinished.........they say that setup is good for 700bhp.

 

scooba went up to 500+ hp and 675+ft lbs on a stock crank they will take alot of abuse.. the rods were the first to go..