Don't get too carried away with big cams in motorkhanas. Cause you will be on and off the throttle all the time, you don't want to be waiting for the engine to come on to its cam. The old mans 4k was like this and it sucked. Was it going to bog down or was it going to spit you around in a circle (stuffed if I know what the specs were but it came on HARD at 4000rpm).