Babbitus fragmentus!

[Synchro909]

Originally Posted by Tom Wesenberg

The best thing you can do for the life of the main bearings is use a COUNTERWEIGHTED crankshaft.

I'll second and third that. Counterweights take a lot of the load off the main bearings and make the motor run smoother. I'm already planning my next engine and counter weights WILL be done. I will not use the weld on type, rather they will be shrunk onto the crank shaft flange and bolted for extra security. After that, I will be putting an extra weight on the side of the first one, nearly doubling the amount of weight. With that crank shaft running on inserts, I expect many tens of thousands of miles out of the bottom end. Naturally, lots of weight will have to come off the flywheel to compensate.