if you were to optimize a chip to work at a lower fuel pressure with an engine would that same engine see an increase in power if the fuel pressure was raised and the program adjusted accordingly?

assuming that the engines power comes from running efficiently would it be a waste of time to look for more power by raising the fuel pressure?

 

typically it would be a waste of time to Raise fuel pressure looking for HP. unless its super super low. it all depends on how the injectors are rated etc.

 

It depends.
In some cases increasing the pressure better atomizes the fuel, in some cases it just increases how much fuel puddles on the runner floor. Also, the intake valve temp, and EGR at overlap play their role. It's one of those things to experiment with.

The one big down side, is making sure the fuel pump keeps up with the higher pressure. A fuel pump can only do so much work, and that is pressure and volume. Ask for more pressure, and it pumps less volume.

 

so in otherwords most of you feel that if it's working efficiently where it's at you don't need to bother?

only reason i'm asking is because i have 30lb injectors and my afpr is at the lowest pressure point it can go on my 383. it works great but i was curious if by bumping it up would i gain anything by adjusting the program too.

 

if you run a fuel pressure gauge and duck tape it or gorilla snot to outer windshield or side window securely you can monitor it. At WOT you may be able to see if FP drops and whether your fuel pump is able to keep up with the demand of the injectors. I would think the size injector is determined by a formula of engine size vs RPM vs duty cycle(80%). Once you put in correct size injector then you determine fuel pump size ? i went to larger fuel pump B4 going to larger injector so just ack basswords...I am at about 11.5/1 at full throttle per dyno so the pump/injectors seems to keep up nicely...