Fuel consumption is much greater in the last half of the 1/4 mile than the first 1/8 mile do to rpm acceleration per second, the first 1/8 you go through two or three gears, the last 1/8 is usually done in high gear only. The Fram canister can be a limiting factor on the supply side, check it to see if it is plug up full of trash or debris A friend of mine ended up substanially increasing his fuel volume by adding another Fram in parelel from the tank to the pump by adding a Y to the inlet side of the pump from the two filters If you can swing it use a better in line 40 micron or larger in line race fuel filter instead of one Fram or two Frams