steel crank snout versus 8-71 blower
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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
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
fastbarry- Posts : 72
Join date : 2009-08-18
Location : aberdeen, Wa
Re: steel crank snout versus 8-71 blower
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.
IDT-572- BBF CONTRIBUTOR
- Posts : 4628
Join date : 2008-12-02
Age : 63
Location : Shelbyville Tn.
Re: steel crank snout versus 8-71 blower
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.
i may even be over thinking this.
fastbarry- Posts : 72
Join date : 2009-08-18
Location : aberdeen, Wa
Re: steel crank snout versus 8-71 blower
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- BBF CONTRIBUTOR
- Posts : 4628
Join date : 2008-12-02
Age : 63
Location : Shelbyville Tn.
Re: steel crank snout versus 8-71 blower
x2. Just don't get hungry with pulley changes in search of more than 10-12 psi of boost.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.
Re: steel crank snout versus 8-71 blower
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.
Re: steel crank snout versus 8-71 blower
i will try to resist the urge to drive the blower much harder than 12 pounds or so then.
fastbarry- Posts : 72
Join date : 2009-08-18
Location : aberdeen, Wa
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» Going from standard snout to boss snout crank
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» Blown boss 9 66' Fairlane
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» Boss crank snout.
» Balancer on long snout crank
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» Crank snout length ??
» Boss crank snout.
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