Vortech Super FMU - Manual

1. MOUNTING AND FUEL LINE ATTACHMENT
A. Attach the super fuel management unit (SFMU) and bracket
to the fender apron or firewall with the supplied screws. The
SFMU can be used as a stand alone unit or in series with a
standard fuel pressure regulator.
B. Connect the fuel rail return line to the -6 fitting located on the
side of the SFMU. The -6 fitting on the bottom center of the
SFMU is to be connected to the return line back to the tank.
2. CALIBRATION RINGS AND DISKS
Three (3) additional calibration rings and disks are included to
set the fuel pressure vs. boost pressure slope. Determine the
correct calibration ring/disk combination for the particular appli-
cation by referring to the supplied fuel pressure chart on the back
of this page (actual fuel pressure may vary with each vehicle
due to differences in fuel pump output, injector size, etc.) The
SFMU is assembled at the Vortech factory with a 3.62" calibra-
tion disk. If a different disk is required, proceed with the following
steps:
A. Remove the six (6) allen head screws from the top of the
SFMU. Carefully remove the lid, diaphragm and disk.
B. Install the proper replacement ring into the housing. Place
the matching disk inside the ring on top of the piston.
C. Reinstall the diaphragm on top of the disk and line up the
holes to the housing.
D. Reinstall the spring retainer, spring (optional) and cover.
Torque the six (6) #10 allen head screws to 24 in./lbs. (2 ft./
lbs.) Do not overtighten.
3. STATIC FUEL PRESSURE ADJUSTMENT
A. Loosen the static adjustment jam nut on top of the SFMU
and pressurize the fuel system.
B. Turn the "static" set screw until the desired idle fuel pressure
is obtained (typically around 38-40 psig without vacuum sup-
plied). Tighten the jam nut and set screw.
SUPER FUEL MANAGEMENT UNIT (SFMU)
© 1995 VORTECH ® ENGINEERING, INC.
all rights reserved
®
ENGINEERING, INC.
WARNING: Do not remove the four screws holding the valve
body to the SFMU housing. Once taken apart, the valve
will have to be replaced.
NOTE: Maximum static fuel pressure with the standard
SFMU spring is approximately 50-60 psi. DO NOT bottom
out the static adjustment screw in order to achieve higher
fuel pressure as it will cause internal damage to the unit. If
more static fuel pressure is required, replace the standard
"static" spring (largest spring in SFMU lid) with the extra
spring included in the SFMU box. This spring has a longer
free length and will provide higher static pressure along
with a slightly faster rate of gain. A third spring, Vortech
#7X100-050, is the stiffest spring available but must be or-
dered separately.