I ran my Go 5 at a state indoor race this past weekend It has 2 going on 3 gallons ..I installed a o86 pipe & turbo button .. It was the first time trying this combo ... Wow what a diffrence ... The layout is super tight lap times are around 14 sec for truggy the dirt began to lay down rubber ..I had a 7mm restrictor and 20 points dailed out of the epa ... this motor would pull the wheels at will .. Yes It has some modd work done to it .. but fuel mileage was great power was awesome ... Its kinda cool to go down the straight away pull on the trigger and watch the front wheels yank off the ground ... the power band is very smooth when the wheels start to come up you know when it going to happen its that smooth and manageable .... Thanx again Brian ... Im very happy with this motor I cant thank you enough