well i have the stock fuel reg. back by the tank. and i was wondering when i install an FMU do i eliminate the stock reg or keep it. and also if i keep it where do i tap into to "wire" up the Fmu? i know the vacuum of course but the inlet and outlet how must i wire these up to work with my 97 RS.

91 civic hatch, homemade turbo+ LS motor = 12 sec street car.

if you are using the FMU you keep the stock fpr (located on the fuel filter) if you are using the SFMU the stock fpr will need to be disabled or removed.
af far as where to tap for a vacuum source. any vacuum line will do. but i'm a firm beliver of getting all lines directly tapped to the intake manifold. this way all your instruments will get a good signal and will function properly.
ohh and as far as connecting the fuel lines...

Remove Fuel Return Hose from Fuel Pressure regulator and plug into "OUT" barb connection on FMU.
Connect hose from other port of FMU to stock Fuel Pressure Regulator.

i believe that is correct.

-97 GS (First project, 299 whp)(sold)
- 97 RS 2.6 last numbers: 306hp, 352tq @16psi (Dead, parted out)
- 99 GS OZ, Hahn Kit, 56k miles (Sold)
--------
- 00 Nissan Maxima GLE (Daily Driver)
- 02 Audi A4 1.8T Quattro

While your at it, upgrade the lines. Theres 2 write ups depending on where you put the fmu:
supply
http://www.2gnt.com/nuke/modules.php?name=Sections&op=viewarticle&artid=58
return
http://www.2gnt.com/nuke/modules.php?name=Sections&op=viewarticle&artid=59

I put mine on the return.

1998 GS-Turbo KANDY -- For Sale
1999 GS-Non Turbo 10th anniversary Edition

I have been in bed with Dino.....ask me for a picture!

lol those look familiar hehe.
but those writeups are for the sfmu, the fmu is a much simpler set-up.

-97 GS (First project, 299 whp)(sold)
- 97 RS 2.6 last numbers: 306hp, 352tq @16psi (Dead, parted out)
- 99 GS OZ, Hahn Kit, 56k miles (Sold)
--------
- 00 Nissan Maxima GLE (Daily Driver)
- 02 Audi A4 1.8T Quattro

so basically is what ur saying is the inlet on the stock FPR stays on. but from the outlet on the stock FPR that goes to the inlet on the FMU. and the outlet of the fmu goes to the return hose port on the tank correct?

91 civic hatch, homemade turbo+ LS motor = 12 sec street car.

anyone?

91 civic hatch, homemade turbo+ LS motor = 12 sec street car.

Yes that is correct....8" hose from stock FPR to IN of FMU. OUT of FMU to fuel return port above fuel pump. Run vac line to the front..

ok . thanks. and also. how exactly does an FMU function then ? i mean wouldnt it just be getting the " leftover " fuel from the stock reg? how would it regulate fuel to boost ratio runnin off a return line from the stock press reg?

91 civic hatch, homemade turbo+ LS motor = 12 sec street car.