Originally Posted by radicalz
Originally Posted by kenglish
OK, here goes. I had a motor (sbc 350/671 blower 8.5 compression plan on 6#boost) built by a local "company", they build/built racing motors but I'm not sure how many blower engines they have built. Here's the rub, the motor is all together less the blower which I will put on. I have been reading up on this and every artical I read says the crank MUST have the 2nd keyway cut, well it doesn't.
So has anyone ever cut one without removing the crank from the motor or is that just NOT an option. Since we are "only" running 6-7 lbs of boost do we really need the 2nd keyway? And ofcoarse these guys are no longer in bussiness and I will have to take it somewhere else to have it done. Any help out there? thanks!
2nd keyway???....why??...the balancer is a press like fit and the bottom blower pulley bolt to the balancer....I might be able to see it if you were running a 14-71 with tons of boost....
#1 James,
Using a Balancer on a Blower Motor is the 1st MISTAKE!!
Always use a Blower Hub,that way you have 6-Bolts on the Lower Pulley.Verses the 3-with a Balancer.
Had a Fellow Years back that would Tear Off a Steel Balancer about Twice a Month until i Double Keyed the Crank,and Installed a C/M Hub!
Later
G 8)