It uses 1 pump to run the motor . it's got 2 pumps on the tank 1 left and 1 right they are both feeding a seporet tank witch is built onto the side of the mane tank . The mane tank has two bathels inside and is foam filled but two times I've done mallory park after about ten laps I would get a coff from the motor because it's all rights on that track . It's last outing at Bedford it was spot on so it was 100 % fuel starvation as the fuel was sitting over the one side of the tank and the scavenger pump was just sucking air