how much fuel pressure?

I am currently running a TO4B turbo, Wally 255HP fuel pump, FIC 550CC injectors, and 24psi. I just installed a adjustable FPR and was wondering what amount of pressure I should be running? Any suggestions?

 

[steve]

Stock (37-38psi)

 

[iLLeffeKt vr-4]

37psi with the vacuum line off the regulator.

 

Thank you

 

Quoting iLLeffeKt vr-4:
37psi with the vacuum line off the regulator.



You meen set it with the vacuum line off and then put it back on when it is at 37psi?

 

set it at 37 with the line off then reinstall the line.

 

Quoting B00000ST:
I am currently running a TO4B turbo, Wally 255HP fuel pump, FIC 550CC injectors, and 24psi. I just installed a adjustable FPR and was wondering what amount of pressure I should be running? Any suggestions?



A lot depends on how you are compensating for the 550's. If you have the ability to compensate for large injectors properly (DSMLink, chip, etc) I'd recommend going to an even higher base fuel pressure, to stretch those 550's a bit more. The Delphi 550's tend to run

 

I am just using a MAFT V2.0 and I wanna get my my ECU chipped. The car is still running a little rich even with it at 24psi. I am going to hook it up to a logger and see what kinda knock I am getting this week. Its not like I am constantly beating the crap out of the car. I only drive it like 1-2 times a week.

 

[CP]

Jeff burned a chip (one of many) for my setup, and then had me mess with the fuel pressure until my HIGH trim was near 100%. Then I adjusted the SAFC until the low and mid trims were close to 100.