Originally Posted by Jaz240

Well your ambient conditions are similar to AZ so it can only be the pipe, your track surface, your trigger finger or your tune. Try negative expo on your throttle servo. That may help smooth things out and get you better run time. There are never any guarantees that one guys 10 minute engine will get the same run time from another driver on another track, but so far everyone but you is claiming fantastic run times with this engine so I think there is a reason for that.