Vortech Maxflow Fuel System - Manual (Page 5)

C. Fuel pump and fuel filter mounting/Feed hose, (cont'd.)
12. Assemble the pump discharge Y-block assembly as before except
with two 1/4” NPT x -6 fittings and one 3/8” NPT x -8 fitting. Connect
the Y-block assembly to the two fuel pump discharge hoses using two
of the supplied -6 x 45
°
hose ends (see schematic).
13. Attach one of the supplied -8 straight hose ends into the supplied
length of -8 hose. Attach hose end assembly onto the -8 flare fitting
located in the pump discharge Y-block (see Photo 4). Route the
remaining length (approximately 15 feet) of hose around the fuel tank
and up to the rear of the passenger side front fenderwell. Do not yet
cut the hose.
•
Route the hose in such a manner so that large radius bends are
maintained (tight bends will cause severe flow restriction and pos-
sible hose damage). Avoid sharp edges and hot mufflers/pipes etc.
Make sure that the hose has adequate clearance to allow for proper
up and down axle and driveshaft movement. Do not route the hose
down the driveshaft tunnel.
•
Attach the hose to the bottom of the floor pan using the supplied
isolator clamps (use only half of the supplied clamps for the feed
hose; the remaining clamps will be used for the return hose) and #12
Phillips head sheetmetal screws. The hose should be routed
outboard of the vehicles’ subframe connectors, if equipped, to protect
the hose in the event of a driveline failure.
14. Temporarily remove the passenger side plastic inner fender liner.
Prepare the supplied fuel rail feed Y-block with the same fittings as
the pump discharge Y-block (3/8” NPT x -8 and two 1/4” NPT x -6
fittings). The Y-block assembly will be attached inside the upper
corner portion of the passenger side inner fender (outside of the
engine compartment), slightly above the plastic inner fender liner
(when installed), next to the factory steel brake line. Mock-up the
entire assembly (-8 feed hose, -8 straight hose end and Y-block
assembly) to determine the amount of hose (if any) to be removed
from the feed hose to achieve a smooth, kink-free hose route.
15. Connect the -8 hose end to the feed hose. Attach the hose assembly
to the Y-block. Cut two 32” (or longer if needed) pieces of -6 hose and
connect one end of each hose to two of the supplied -6 x 90
°
hose
ends.
•
Temporarily connect the hose assemblies to the rear of each fuel
rail on the intake manifold. Clock the 90
°
hose ends so that they point
down and over to the passenger side of the vehicle.
•
Route the hoses out of the engine compartment through the factory
opening in the rear of the passenger side shock tower. To verify
proper hose length, temporarily attach one each of the supplied -6
hose ends (90
°
and 45
°
) to the Y-block (see diagram).
•
Route the lines into the inner fender and to the hose ends (make
sure hoses are routed smoothly without sharp bends). Make sure
that the hose is correct. Mark hose for trimming, if necessary.
NOTE: Depending on how the pumps were oriented
in their clamps on installation, they may need to be
rotated. When looking at the end of the fuel pumps
from the driver side of the vehicle, the fuel pumps
should be clocked so that the discharge fittings
point up in approximately the one or two o’clock
position (do not allow for the discharge fitting of the
lower pump to contact the electrical terminals of the
upper fuel pump or the bumper).
5
Photo 4
Photo 4 - Close up