Quick Fuel Technology Qfi Electronic Fuel Injection System - Manual (Page 10)

10
PHOTO - BARBED
FITTING/RETURN
LINE INSTALLATION
TO FUEL TANK

Reinstall the fuel tank. Be certain it is securely mounted to the chassis

Mount fuel pump to the chassis, using the two mounting brackets with rubber vibration isolators
provided.
o If using the QFT 500 System Base Kit, you must use an EFI
pump (either in-tank or external) rated for 40-45 psi
(continuous) and 45 gallons per minute (gpm).
o Mount below the bottom of the tank outlet for a gravity
feed
o Position within 2-3 ft. (61-91 cm) of the tank
o Place in protected position above the lowest portion of the
frame and away from the exhaust (or shielded from
exhaust heat. This is also necessary for fuel line routing)
o If frame mounting is not possible, fabricate an “L” shaped
metal bracket, and mount close to tank, and position the
pump at or below the fuel tank outlet.
o Remove the plugs from the pump and install the 3/8 in. (0.375 in. /10 mm) fittings (provided)
with blue thread locker sealer (Loctite 242 or equivalent). DO NOT use Teflon tape or pipe dope
on fuel lines -- will clog fuel injectors!!
o Install the sealing washer on the outlet fitting and attach to the outlet of the pump
o If using AN fittings, use 3/8” NPT/-6 AN adapter fittings at both ends of the fuel pump
WARNING -- DO NOT OVER TIGHTEN FITTINGS!

Install fuel pump ground line to the chassis.
o Drill 5/32 in. (0.15625 in/4 mm) hole in chassis
o Scrape area to expose bare metal (assures an excellent ground)
o Install with 3/16 in. (0.1875 in/4 mm) self-tapping metal screw
inserted through ring lug

Attach the power (hot) lead to the fuel pump. Use of electrical
shrink wrap over the pump’s electrical terminals after installing is
highly recommended. This helps protect the pump terminals on the hot and ground sides from
corrosion.

Install inline filter(s) -- pre-pump (low pressure) is
recommended/high pressure filter required (NOTE: A
carburetor filter CANNOT be used)
o In-line Pre-Filter (OPTIONAL) -- If choosing to use an in-
line fuel pre-filter (in addition to, or instead of, a sock-type
in-tank filter) between the fuel tank and the fuel pump,
mount it securely to the chassis. This MUST be a low-
restriction filter (100 microns). It must be mounted in line
with the fuel pump inlet (or higher but NEVER lower), and
should be able to maintain gravity feed to the pump. (Incorrect filters can cause the pump to
create a vacuum and aerate, leading to reduced fuel delivery to the injectors and poor engine
performance.)