I have several 250 that I have been robbing parts off of and selling to support my habit. The other day a friend and I were going through some of my stash of parts and comparing against similar parts to determine what we were going to put in a more performance oriented engine I am buildiing soon.
We were looking at three crankshafts and he noticed that the bob-weights on one were significantly smaller in size than on the other two. The width at the bottom of the weight as well as distance from the crank journals was much less. This got us to thinking about weight.
When we picked up the crank, the one with smaller bob-weights had to weight at least 5lbs if not closer to 10lbs less than the other two.
I remember the smaller crank coming out of a 250 that was installed in a late 60's pontiac. I think it was a transplant.
It's definitely a stock crank, without any machine work done to it. Does anybody know anything in regards to this subject? I will try to get the casting numbers to help.
Just thinking that a crank that is that much lighter would be pretty nice for a more performance oriented motor.
Last edited by trump; 04/13/09 11:09 AM.
