1UB Internally Balanced

[darren121671]

Hey guys,
              I was wondering if it's possible to internally balance a cobra jet crankshaft? I recently read a classified ad of a person selling an 427 engine with a 1UB crankshaft that he claims is internally balanced. Is this possible?

[Yellow Truck]

Yes.

[fryedaddy]

i had my 428 crank int. balanced.now i can use a common 390 flywheel.it is a little costly because that mallory metal used to add weight aint cheap

[darren121671]

So it is possible, just with extra expense versus a standard balance job?

[Posi67]

It's done all the time and actually the proper way to go. Depending on the piston/rod combo you should see about 3 slugs Mallory metal on the back counterweight and maybe elsewhere. Internal balance of that crank will have other tell tail signs but the added weight is the most obvious.

[darren121671]

Thanks guys. That's what I wanted to know.

[Qikbbstang]

Ironically my 428 cranks (that I shipped all the way to Ark Ak to be machined) is being done right now for my 427. I will be tickled green ($$$) if it only takes 3 slugs - I'm expecting more

[fryedaddy]

i ended up spending a grand on my crank