Originally Posted by Infinite
the return system isnt like you think.
With the return before the rail its not a traditional system.
Upping the pressure with our style of fuel system means the injectors flow more fuel for a given duration, but youre limited.
This is the style we have
which is not designed for high performance/flow applications
This is what must be run for high flow/performance applications.
Placing the regulator after the rail means you ahve more flow through the rail and none of the injectors are starved for fuel, which is what happens with our style of fuel system once you start making power
Only issue i see with this is the factory fuel rail would have to be replaced with the regulator placed after the fuel rail. Most would not be willing to go through all this trouble. Placing this RRFPR(rising rate fuel pressure regulator) before the rail would allow u to use the factory rail.
FOr example placing the RRFPR before the rail running a separate line back to the filler line before the factory regulator. The factory regulator would work when your in vaccum or not boosting but once you get into the throttle the RRFPR would begin to raise the fuel pressure according to your boost. No reason for bigger injectors or an aftermarket fuel rail.
I have never done a returnline setup with RRFPR so im not sure if its possible i'll research and if it has been setup like this.