Can the Stillen FMU work without having the OEM regulator in place? Would it able to hold the correct base pressure? I assume not. If not, what other adjustable base pressure FMU are out there? Cartech?

 

No... The Super FMU can, though.

I'm assuming you're talking about the Vortech FMU in the Stillen SC kit.

 

The cartech FMU is BETTER than the SFMU.

And the cartech FMU can adjust base pressure without the FPR.

 

Sorry, Kirk, that is incorrect. The Cartech fmu is not able to adjust base fuel pressure. At least mine can't. The Vortech s-fmu can.

 

The reason I'm asking is because I want to run my direct port nitrous with SC. I will need the FMU to have adjustable base fuel pressure so I can run my AEM FPR after it for my nitrous system. Prior to the FMU, the fuel pressure will be raising with boost. After the FMU, the fuel pressure will raise like it would on a NA engine. Am I thinking correctly??

 

I believe that is what Hal does.

 

I don't believe that would work theoretically... The fuel pressure after the FMU (or after the FPR if no FMU is present) will be very low so I don't THINK that even an additional adjustable FPR could bump it back to a high enough fuel pressure (34psi)... I COULD VERY MUCH BE WRONG if Hal has already proven it possible, though. I'm thinking the "self adjusting fuel pressures to either side of an "adjustable" regulator will be screw each other up. I'm no flow engineer... always so so with my physics...LOL

 

****.. I thought the SFMU could not and the cartech COULD.

stephenbags


THANK YOU my BAD

 

Hmm...you got me thinking. I think worst case senario would be using an Aux fuel pump bypassing the fuel rails and goes directly to second FPR.