here's some data on a stock FG pump flow figures. http://www.fordxr6turbo.com/forum/topic/81721-fg-fuel-pump-testing/ This info is not available at many places as most operators do not have this equipment, we can run any rwd car on our dyno and measure what is actually occurring in the fuel system, but obviously does not factor in fuel moving away from the swirl pot/pump under acceleration/cornering etc. Something else to remember, is the surge tank it self does not flow more fuel, that's the job of the fuel pump no matter where it's located, many seem to be confused on this matter