I would say from 220-250... I didnt have a temp gun when i had my .15, but i think it was overheating a lot when i was running it... Both of my friends and i had a problem with the carb... The LSN unscrews and falls out.. that happened to myself and two friends... They were tuned nicely... Didnt notice untill i went to refuel... it was sticking out pretty far, and i touched it and it fell out... Maybe it was just the o-rings wearing out or something, but it was weird.