i hope i'm posting this in the correct forum. didnt see a fuel injection section, but here goes....i play with sprintcars. they have mechanical fuel injection and we burn methanol.we use systems called high pressure and a standard.the standard use a normal size nozzle and the high psi uses about two steps down on the nozzle size from the baseline that you start with. basically you are increasing the pressure and forcing the amount of fuel you need thru the nozzle the get the correct afr,as well as,"atomization of the fuel better".droplets of fuel burn. atomized fuel or vapor fuel explodes. gives better throttle reponse and horsepower.the high pressure system is very sensative to outside air temp. very sensative. can this same theory be used on the electronic systems that we all are using on our trucks

 

Probably not the right section.

Higher fuel pressure can have improvements to a point. You would need to completely re-tune the truck for the higher pressure and set the injectors to open for a shorter time. The tbi motors guys talk a lot about upping pressure over stock but no body seems to do the same in a multi port injection motor. I am guessing because there are much better and easier ways to make more hp.

Many nitrous guys actually go with a fairly low pressure if they are doing a stand alone system for there nitrous, for ease of tuning and the tiny jet for the high pressure can get clogged very easy.