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This is the car's custom-made 10-gallon fuel tank. Notice the thickness of the bolt-on lid sitting beside the tank, indicative of the pressures this vessel must withstand. Internal pressure will rise in relation to ambient temperature, and could reach upward of 300 psi in a mid-summer track environment. Inside the tank is an Aeromotive A1000 fuel pump, along with a Weldon pressure regulator set to maintain 50psi of fuel pressure beyond whatever pressure exists in the tank, meaning the fuel rail and injectors will see pressure that varies with ambient temperature. A pressure/temperature sensor in the fuel rail helps the XFI processor compensate for flow rate changes caused by these pressure fluctuations.