I am looking for a 4" stroke, LS7 snout length, crankshaft to run in a project (want to run the factory drysump system).

I'm trying to decide between a used GM LS7 crank (say $500) and an aftermarket (eagle/callies/etc) LS7 crank (say $1,000). For my application, either crank is certainly strong enough/quality enough/etc.

My understanding is that due to the LS7's TI rods, the factory crank requires a considerable amount of heavy metal to balance with steel (forged) rods.

In the end, does the used GM LS7 crank end up costing more than an aftermarket crank?

 

I can't see re balancing costing more than 100 or so. Regardless of the amount of weight needed. However, either way, even the aftermarket crank will need balanced. So in the end, the cheaper initial cost will be your best bet.

 

Thanks.

 

The factory crank will cost 350-450 for balancing, the aftermarket will be close and should be less than half that. The Callies Compstar LS7 should be your cheapest solution, they normally come rough balanced between 1800-1850G.

Kurt

 

Mallory is not a cheap metal !!!