well I only have about 30miles on this engine. Just finished it. I did have one point hitting the gas and it zipped to 6k quicker than I could blink. After a few more miles i'll lean on it some more to see how she rev's out. But so far so good.
in a couple weeks when the mud and snow start to dwindle I'll get to play more. I wouldn't think I would need to rev it much past 6500.
