Which crankshaft for high boost??
Thread Starter
Burning Brakes
Joined: Mar 2007
Posts: 946
Likes: 0
From: Port Charlotte Florida
Which crankshaft for high boost??
I am in the process of rebuilding my motor. Its just a lil 347ci motor with Patriot heads and a blower cam. Its obviously forged but with a stock crankshaft. I was intending to leave the crank in, but I got a call from my builder, saying my crank is bent and hes pretty sure its cracked 
So I dont have a crap load of money to spend now that I put so much money into the rebuild. Do you guys have a recommendation on which crank would be good for me with 20lbs of boost? Also if you know of a place that has killer deals, lol... THANKS
So I dont have a crap load of money to spend now that I put so much money into the rebuild. Do you guys have a recommendation on which crank would be good for me with 20lbs of boost? Also if you know of a place that has killer deals, lol... THANKS
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
I just read a thread on another forum recently where several engine builders were reporting cracked/broken cranks on boosted motors and they were high qualify forged cranks.
Tech Contributor
Joined: Jan 2007
Posts: 19,470
Likes: 1,171
From: Dyer, IN
Here's a good read: Link
Interesting that many claim the crankshaft cracks are due to a blower, but the individual with the picture showing a cracked crankshaft is NA.
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Burning Brakes
Joined: Aug 2009
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From: Wrentham Mass
2018 C2 of Year Finalist
Melting Slicks
Joined: Sep 2003
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From: Northville Michigan
Former Vendor
Joined: Apr 2006
Posts: 2,470
Likes: 2
From: Portland OR
St. Jude Donor '10-'11-'12
At $3800 for a crank, they had better be good. There aren't to many people that need one of those but Callies offer a CCW crank as well. Just isn't needed in 99.9% of the applications out there.
Melting Slicks
Joined: Sep 2003
Posts: 2,458
Likes: 105
From: Northville Michigan
I just received a quote from Bryant for a 4.038 inch stroke crank for a 440 LS series engine - $2,975 with shipping - 6 weeks delivery.
