How much would you change the balance factor, just changing peak rpm from 3600 to, say, 8500 rpm, changing nothing else?A stock Briggs operates at a constant 3600 RPM. I'm assuming the crankshaft is balanced to that RPM.
The balance factor of a stock Briggs, I'm assuming, would be greater in an engine that operates between 3600 and 5500 RPM. More like 4500 RPM. How can you dispute that?
Someone should cut large holes in a Briggs stock appearing piston and see if I'm right. If you lighten the piston, it does pretty much the same thing as making the crankshaft counterweights heavier.
I am not schooled in balancing percentages. I don't know what a good number would be. I just know that something heavier would be better.Would you change it from 80% to 60% ?
Was that a builder in mid Cali ?I am not schooled in balancing percentages. I don't know what a good number would be. I just know that something heavier would be better.
In 1974, when I built my Mac 91 open, Horstman was selling tungsten counterweights for the Mac crank, that's the most experience I've had personally. A couple of guys have drilled KT100 crankshaft for adding weight, that seem to work. Unfortunately, When it was discovered, people lost first Place trophies that IKF events, Both Sprint and enduero