I ran a 4 gal tank with blown 358" mtr. and 1471 w/buzzard catcher and enderle 110 pump. Always warmed it up in the pits, then refill and towed it up to the front of lines with 4 wheeler. 1 burnout as much as 200 ft. and full 1/8 pass and drove it back to the pits. Pitted close to the 1/8 finish line, never ran out of fuel one time. i've done this many times.
It would use 2 to 3 gal.
I run a 3 gal on my Malibu with toilet on alcohol front pump and can drive to the line and back to the pits even 1/4 mile racing.
Zip.