Balancing of stroker kits and vibrations

crackedback said
If it was a eagle balance job it may be a "bit" off...

Each item needs to be weighed and the rod weight needs to be split between reciprocating and rotating.

Most of the time those bobs end up in the 1700-1800 range IIRC.

I'm not sure who or even if the assembly was balanced. Says right on the Jegs website for this kit. That it is not balanced. Supposedly a reputably builder in the Lancaster area built it. Hard for me to imagine anybody building a performance motor without addressing that. Although out of all the receipts that came with the car I don't remember any for balancing.

moper said
If the crank is showing any signs of movement in the dampener then it had harmoins present, and enough that the dampener couldn't do it's job. I'd call the marks a symptom - not the problem. I would never trust a supplier's claim of "balanced". There are too many different opinions of what "in balance" really is.

I'm kind of thinking the same thing. Everything was new when assembled I have most of the receipts. I think the vibrations I was feeling caused the damage to the crank where the balancer mounts. The balancer was still tight and I used a puller to remove. But some pretty bad looking metal on the crank in the front 50% of balancer mounting area.

Guess the question now is the crank savable or usable? Here is a picture, the bottom groove is suppose to be there but you can see the galling above towards the top.

I should of probably stopped running the engine earlier. I keep thinking it was everything but the engine. It wasn't a terrible vibration just the type that it would drive the driver nuts feeling it through the steering wheel on long drives. I even changed out the solid motor mounts to rubber.