....Sorry can't release phisical numbers-this is one of the numbers can be disclose......
Thats cool I was a little stumped and needed a hint (which you provided)
...I do very steep taper there, right under the exhaust port. It is free up piston. Under the exhaust port we don't need any sealing, so the more we take out-less friction we have there.....
Thanks, Never thought to mess with exhaust I've been playing with boost and transfer. I will give it a try........too bad its 28 degrees outside so no testing for a while
ps - Can't wait to see how the PS12 does at the winter Nats - Good Luck