350 SBC Crankshaft Advice

[Bob Mulry]

Originally Posted by ss3011

No matter what the crank looks like , the one thing that remains the same is the bobweight . If the rod throws are drilled then extra weight has to be added to the counter weights . You might be able to get a similar crank approved for a Pontiac , which I hope you do !

Why add weight to the counterweights, weight has to be removed

What do you do with the side opposite the journal (counterweight) if the total rotating weight (bob weight + the weight of the journal) is reduced. Forget the bobweight, that's just a function of reciprocating and rod big end weigh?????

The weight is removed opposite the journal, you gain from the reduced weight of the journal side and the reduced weight caused by the removal of weight from the counterweight to balance it..

That's why a lighter crankshaft is better than a heavy crankshaft.

Make sense.....