I do find it interesting that when you search "broken crankshaft" you'll find discussions around the Fluidampr brand. Even some of the threads at Speedtalk discuss this. Makes you think....
Funny that I never broke anything when running them...and thats up to 8600 rpm..
Mine put a crack in my Visa card.
I have used ATI... mainly for 1 reason.... its lighter.. and that engine went to 9600 a couple of times... but normal was 8400
