I structio Co te ts:
Kit Contents 1
Recommended Tools 1
Special Instructions 2
Features 2
Drilling The Hole 2
Installing Red C-Ring 3
Black & Red Ring Installation 3, 4
Assembling the Pump 4
Installing the Pump Assembly 4
Running a Return 5
Assembly Illustrations 5
Plumbing Schematics 5, 6
Fuel Pressure Regulator 6
Warranty 6
Special I structio s:
• For extended fuel pump life never let car go below 1/8th tank of gas.
• If using hard fuel lines make sure to use high pressure EFI rated lines and flared fittings.
• Make sure that you remove ALL low pressure flex joints on factory fuel lines and replace
them with EFI rated fuel hose and use proper flared connections and clamps. Be careful not
to mix 45° SAE fitting and 37° AN fittings, they look similar but will not work together. 45°
SAE fittings usually come from a hardware store or auto parts store while 37° AN fittings
are the ones supplied by FiTech and most speed shops.
• If using a return line use at least a 3/8" line.
• FiTech does not recommend aluminum fuel lines EVER! Use EFI high pressure fuel hose
on any plumbing in your system where high pressure is present.
• If using Push-Lok style hose and fittings in your fuel system, make sure all parts come
from the same manufacturer Mixing brands of hose ends and hose could cause leaks.
•FiTech's o EFI systems are designed for unleaded pump gas up to 15% ethanol content.
• Relieve the pressure from within the system before opening the fuel system.
Very importa t ote: Your fuel ta k must have a ve t or use a ve ted cap to preve t
pressure buildi g up i side the ta k!
The Hy-Fuel In-Tank Retrofit Kit is designed for almost any fuel
tank depending on depth. By mounting the fuel pump in the
appropriate position on the return tube, it can be installed in
tanks ranging from 6 to 12 inches in depth. Note that these in-
structions and this kit address installtion in stock fuel tanks
(Version #1) as well as Tanks Inc. fuel tanks (Version #2). The
FiTech Hy-Fuel low profile design allows for maximum clear-
ance from the floorpan of the vehicle. The system comes with
a high quality 255 LPH fuel pump for engines producing up to
600 HP naturally aspirated. It also comes with a 35 square
inch OEM style sock filter (Version #1) to ensure clean fuel,
extended fuel pump life, and a steady pickup to the pump. If
necessary, replacement parts are available from:
www.FiTechEFI.com
Versio #1 (Stock Ta k)
Cautio : Wear eye protectio a d e sure ta k is free of com-
bustible fumes!! Have a radiator shop boil out the ta k.
Drilli g the hole:
1. The HyFuel assembly must be installed into the fuel tank.
2. Before beginning to cut the 2-1/8" diameter hole, align the red C-
Ring (#3) in a central position on the fuel tank positioned far enough
from edge of tank for clearance for the filter sock (#11). Try to find
a flat area of the tank to make the 2-1/8"" diameter hole. If this is not
possible due to ribs in the tank, the supplied thick foam gasket will
allow installation over ribbed areas.
3. In selecting your hole location, be sure to avoid the stock fuel level
sending unit assembly and stock fuel pump pickup. See Figure 1.
4. With the red ring in position, mark a spot in the center of the ring.
Using a scribe, you can scribe a circle around the outside of the red
ring and then measure from the scribed line to find the center.
5. Now, you are ready to begin your cut, drill a 1⁄4" pilot hole in the
center of the X spot. See Figure #2.
X
Fig. #1
6. Then using a slow speed drill with a 2-1/8" hole saw, cut a hole
in the tank. See Figure #3.
Cautio edges will be sharp o ce hole is cut through the fuel
ta k.
7. Remove the cut piece and use a file to deburr the sharp edges.
Installing the ed C- ing
1. Using the Red C-Ring as a template, drill (6) 1/4" holes in the tank.
See Figure #4. Deburr the holes.
2. Thoroughly clean the tank to remove all of the metal chips and
debris inside and outside of the tank. Prior to final installation, it is
important that the inside of the tank is totally clean.
Drill 1/4"
h le
Features
2
