[quote] The problem with this method (BG below) is it totally ignores the weight of the vehicle. Here's a test I plan to preform someday soon: Take fuel bowls off carb and put them in cans and turn on the fuel pump and see just how much the pressure drops at maximum float drop.
Fuel pressure has nothing to do with how much volume the system will support, if you do that test and you have any pressure at the gauge you need bigger fittings, lines or needles and seat <img src="/ubbthreads/images/graemlins/scope.gif" alt="" />As MrPbody already pointed out, the real test of any fuel system(on gasoline) is to be able to fatten the mixture up enough so you can slow the car down by having the mixture to rich. I have seen some very knowlegable racers find out that they had enough fuel to run low nines at 148.7 MPH on squeeze but not enougn fuel delivery(volume) to go any faster. This particular racer jetted his carb up 10 jets sizes in 5 stages(two sizes at a time on all four jets) and the car ran within 1/4 MPH in the 1/4. It didn't miss, it didn't burn up any spark plug ground electrodes or hurt any parts. He added another pump, line and regulator and jetted it back down to the beginning jetting and the car pickup .22 ET and three MPH (151.6)on the first run. He jetted it up two sizes and went faster, he tried another two sizes and slowed down a tiny bit, he went up another two sizes and slow down two MPH <img src="/ubbthreads/images/graemlins/1343795-scratchchin.gif" alt="" /> It pays to test <img src="/ubbthreads/images/graemlins/thumbs.gif" alt="" />