i got about 6 mins on my tank of fuel n my 8ight buggy with the restrictor in the tank. it polly could of made 6.5 mins.. and this is at temps of 220 to 230.. i ran my best this past weekend with the go 7port it has good smooth power. ill prolly buy a new one later i just really think the jp3 pipes isnt a good combo with this motor at all.. think id prolly try something new like a 053 or the os2060 pipe..