Join Date: Dec 2003
Location: Kankakee, Illinois
I ran an 07-08 1k. It gobbled fuel. I used 10-15 gallons a day at track days.
I assume you are trying to only carry as much fuel as is needed to save weight? Get a wooden dowl rod and a Sharpie marker. Start with an empty tank and pour in 1/2 gallon. Dip the dowel and mark it with the sharpie. Repeat every half gallon until the tank is full. Now you have a tool to gauge fuel consumption. Fill the tank, run a session and then use the stick to measure what is left. Now you know what you used, so you can adjust downward until that amount of fuel plus a safety margin is all you put in before a race. The reason I suggested starting at 1/2 gallon is because below that, you may run into starvation issues during extreme cornering and braking. I suggest you try to have at least 1/2 a gallon in the tank at the finish.
Bear in mind that a red flag and a restart could run you dry if you cut it too close. Also, faster tracks use more fuel than slower tracks and gearing changes will also effect consumption. Experiment and keep notes. You didn't think this was going to be easy, did you?