440 Source Balance Job

fishmens67 said

sounds like your guy wouldn't be happy with my guy and vise versa.
I'd be betting Brandon's balancing is up to par..

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The shop I work with has rebalanced a number of 440Source "balanced" rotating assemblies. It all has to do with what the engine builder is comfortable with. The engine builder I work with wants unbalanced kits. The "balanced" kits are never perfect and he wants perfect. Just the way it is.

In theory the kits shouldn't need to be balanced. Everyone in the supply chain knows the weights of the components so in theory the cranks should be made to the correct bobweight. They have to be machined anyway so why not just go ahead and machine them to the finished bobweight when they are made. That is how the OEMs do it, and it would save everyone a bunch of time. But nobody does it that way.