[HWYSTR455]

Originally Posted by Keith Seymore

K1 Technologies 4.25 stroke crankshaft for a BB Chevy.

Made almost 300 passes before it broke the nose off.

It ran like that, too - for a little while.

K

Cast crank I bet?

I had a Pontiac 455 crank break at the same spot, several respected builders said either the balancer was junk or the bolt wasn't tight. I had an OE type non-SFI replacement balancer on it, bolt was tight. The balancer did wobble slightly though.

I use forged cranks and SFI balancers that are properly fitted from that incident on.


EDIT: In my case, the engine just 'shut off' and wouldn't start. I had someone turn the key and I noticed the accessories weren't turning....


.