steel crank snout versus 8-71 blower

i just picked up a 8-71 blower to put on a 523. the engine has a standard snout eagle forged crank.

the engine makes 510 hp with a small cam and low comression.

here is a link to a thread on the motor. the engine was built for a turbo build and then run with a n/a cam.
https://www.429-460.com/t14437-523-dove-headed-stump-puller-update

i would like to make 10-12 pounds of boost. at what point should i be worried about the small diameter crank snout with regards to it breaking off from the loading by the blower belt.

i would like to hear from anyone with input.

thank you,
barry

I cant answer your question, but I will give you an idea, if you haven't thought about it, you can run a support bearing on the end of the crank to help carry the load.

i had not thought about a support. that is not a bad idea. i am going to shorten the spacer up and get the balancer and pulley/belt package as close to the timing cover as i can in order to reduce the leverage of the blower pulley.

i may even be over thinking this.

Not having ever ran one, I can't give you a definite answer, but my gut feeling is with only 10-12 lb's of boost it will be fine if you bring everything back as close to the seal as you can.

IDT-572 wrote:...my gut feeling is with only 10-12 lb's of boost it will be fine if you bring everything back as close to the seal as you can.

x2. Just don't get hungry with pulley changes in search of more than 10-12 psi of boost.

Come to think of it, forum member Blown473 is running a cast 460 crankshaft with an 8-71 on a 0.030" over 460 making 10-12 psi and the engine runs great. With the steel snout, 10-12 psi ought not be a problem on the 523.

i will try to resist the urge to drive the blower much harder than 12 pounds or so then.