We're building our LS1 with a super-stout forged crankshaft from K1 Technologies, but before we could install it, we needed to balance it. In a nutshell, crankshaft balancing attempts to counteract the forces on a crank as it spins, meaning the weight of the connecting rods and pistons, as well as the piston rings, oil, bearings, and everything else. For …
It's worthwhile to note that balancing symmetrical motors, like flat, or inline, requires no bobweights.
It's the vector sum of forces from two rods on one crankpin on V style motors that introduces the need for bobweights.
So it's about an order of magnitude simpler.
This is one of those jobs I always pay the man to do. I found that balancing the rotating assembly of a motor greatly improves durability. Every motor I built for endurance racing was balanced. I attribute never having one of the motors I built fail to balancing. 8, 10, 12, & 24 hour races will find motor issues for you. I always felt by balancing the rotating assembly you are reducing or eliminating forces on the motor that cause failures. I have no actual proof of this but our 4age motors were seeing 8k rpms regularly in these races.
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