[Cliff R]

You can support big HP with pretty much "stock" fuel systems and simply a mechanical pump upgrade right up untl the moment you take steps to make the car hook really hard and pin you in the seat on the launch

At this point sucking fuel some 14' or so from a stock in tank sump with stock lines will not longer make the grade.

What muddies the water here is that some folks post they they get away with it run on down into the 11's and some even on into the 10's without any further upgrades when most folks trying to do the same thing can't get out of the 13's.

I went thru the entire evolution with my car when I started installing bigger engines, more gear, converter and good tires. At the end of all the efforts to keep the carb full on hard runs I ended up sumping the tank and installing a 140gph pump behind the tank and 8AN lines/fittings everywhere.

That move INSTANTLY solved any and all fuel delivery issues and the car picked up a solid 2-3 tenths and at least 3-4 mph. That was just on the first outing. I made a few more changes and went on to run much quicker and never again experienced any fuel delivery issues whatsoever.

Since technology has improved considerably if I were doing it over again I'd go right to an in-tank system and "push" all the fuel and run a full return back to the tank. Then, as mentioned someplace above I could continue to make changes to make more power and go faster at the track without having to re-visit fuel delivery issues.......FWIW.......