[GTOGEORGE]

Originally Posted by 69Goat1

I run an old Ed Pink 8-71 race blower on my GTO and a couple nights ago at cruise night I noticed the hub had slid out and my belt was dancing around. The hub is a BDS unit for pontiacs and I was using the factory crank bolt to hold it. It looks like it became loose and the hub was working back and forth on the key causing it to wallow out the keyway in the crank and then the bolt broke and it split the crank hub up through the keyway.

Since I am now having to change out a perfectly good crank is there a better hub or system than what I had? If this had been an exepensive forged or billet I would be really ticked but right now I am “only” looking at about $1200 to fix

Cant you just replace there snout of your crank?
I use loctite (blue) on my damper bolt.....never had one come loose. NOW I've broken the hub on my damper couple of times BUT I am a Bracket Racer so me getting off and on my throttle a couple of times a run is a BAD thing.


GTO George

[69Goat1]

Originally Posted by GTOGEORGE

Cant you just replace there snout of your crank?
I use loctite (blue) on my damper bolt.....never had one come loose. NOW I've broken the hub on my damper couple of times BUT I am a Bracket Racer so me getting off and on my throttle a couple of times a run is a BAD thing.


GTO George

Never heard of replacing a snout! It’s a factory 455 crank...

[GTOGEORGE]

Originally Posted by 69Goat1

Never heard of replacing a snout! It’s a factory 455 crank...

CAST crank.......that would be the problem!



GTO George

[mgarblik]

This is an area we have put considerable time and effort into and so far, no failures. We use a double 1/4" keyway with hardened steel keys. We use an RCD blower hub for a 385 series Ford application that is NOT fully finished. You need to call them and tell them exactly what you are doing and they will pull a Ford unit off line before final hone which will give you a nice .001-.0015 press fit on a Pontiac crankshaft. Then we use a hard steel very thick custom step washer Eric designed but can be made fairly easily on a lathe. PM me and I can scan and send you a blueprint for the washer. Then we use an L9 bolt tightened to 230 Ft. Lbs. to hold it all together. So far, it has been a very simple and reliable set-up. I have the bolts and blueprint for the washer if you decide to go this route. As George said, if it was a billet or forged crank, I would consider cutting the nose off and putting a new one on. Cast N, crank, time for a new one.