Computer - Chip - Injector's - Transmission
- Engine - Rear End - Tire - Gas Tank
All of these work together as a team. So
when you are planning to build your vehicle , you need to plan
a package that will work together before you even start to bolt
it on. A little planning in the beginning will save you allot
of headaches during the building process and provide you with a
vehicle that will be trouble free and a pleasure to drive.
One of the most important things in this
plan is the fuel delivery system. Keep in mind that the easiest
way is not always the best way. In the long run the easy way my
cause you allot of problems. One of the first thing to consider
is the gas tank, and the fuel pump. You want to put the pump in
the tank if at all possible because external pumps are not
designed to suck , but to push only.
Most people don't realize that
external pumps that were used on Ford trucks, vans and 500
cubic inch engines had low pressure pusher pumps in the tank
that pushed fuel to the hi pressure external pump. A problem
with external pumps, if they are not installed properly, you
will not get the proper fuel pressure to the injection system
and will eventually burn the pump up because of the lack of
fuel to lubricate the pump. If you must use an external pump, a
good pump to use is the 87 - 89 Ford Truck or Van, Mercedes,
older Cadillac or Datsun 280ZX external pump. On these vehicles
the tank had a good baffle inside. The pick-up port should be
1/2” NPT and close to the bottom of the tank. If the tank
is not baffled fuel will run away from the pick-up port when
going around a corner or accelerating. If you pull out of the
top of the tank, you should use an external pusher pump that is
designed to suck fuel from the tank and push fuel to the hi
pressure pump. You should also have a minimum of 3/8”
line from the external pump to the pusher pump. Do not use a
pre-filter with external pumps because as the filter gets
dirty, it makes it more difficult for the pusher pump to push
thru the filter. If using an external pump it needs to be
mounted within 18” of the fuel tank. When installing new
fuel line make sure that you flush your lines with fuel before
connecting them to your injection unit. Blowing air thru the
lines will not remove some of the fine particles left in the
lines from when they were cut. These particles will get trapped
in the injector screens and stop the fuel flow thru the
injector.
A. AC Delco EP-185 External Hi-Pressure
Fuel Pump
B. AC Delco EP-12S Pusher Pump
C. AN Fittings for External Fuel Pump
D. AC Delco GF-481 Fuel Filter w/S&P
16mm to AN#6 Fittings and Mounting Bracket
E. External S&P Aluminum Mounting
Bracket for a EP-185 Pump
If your external pump starts to
make noise it is best to pick up a spare. External pumps
are not the least expensive way to go. The Ford external pump
is over $400.00 and by the time you buy the fittings and other
hardware you will have to spend as much as you would if you had
a pump put in the tank. If you have a good tank, there are
company's such as Rock Valley who you can send your tank to and
they will install the pump for you. Rock Valley, Tanks, No
Limit, and other company's can provide you with a tank for your
application with pumps already installed in the tank.
For later model vehicles it’s even
easier to put the pump in the tank. For instance, a fuel pump
assembly out of a 86-87 monte carlo 4.3 throttle body will fit
in 78 and later monte and El Camino gas tanks. On 78-81
Corvette all you have to do is use 82 Corvette in tank fuel
pump assembly. On Blazers, Suburban’s, and pick ups you
can use the same body style 87 and later gas tank or sending
unit in earlier vehicles. If it is a throttle body sending unit
and you are running a T.P.I or multi-port all you have to do is
put a Corvette pump on the unit. For your application, you can
call one of the Street & Performance tech staff for help at
479-394-5711.
Vapor Lock is another problem, Every year
in July and August we get calls from people traveling long
distance with their vehicle and experiencing vapor lock.
Vapor lock is the heating of the fuel to
a point were it turns to a vapor. Internal pumps will help keep
exhaust heat away from the pump, lines and tank. Making a
heat shield between these parts and exhaust will also help. Hi
altitude will also cause a vapor lock sooner. Another way to
prevent late afternoon vapor lock is to top off your gas tank
with cool fuel. You should also keep fuel lines from coming
down by the back of the headers, because with hot air coming
off of the radiator and the headers and blowing over the fuel
lines act like a heat exchanger. Using an improper fuel filter
such as a billet style designed for carburetor's, restricts
fuel flow and put’s extra back pressure on the pump.Fuel
Injection works better than a carburetor because it circulates
cold fuel at the injector, were with a carburetor the fuel dead
heads and is warmed by the engine heat which takes away
horsepower.
Pictured above is a Stainless Steel Tank
and mounting straps with a In Tank Fuel Pump provided by Rock
Valley for a 55-56 Chevy.
Rock Valley 1-800-344-1934
A. AC Delco
EP-241 In Tank Hi Pressure Fuel Pump for T.P.I or Multi-port 45
+ P.S.I(Throttle Body requires 18 P.S.I Part # AC Delco EP-126)
B. Typical In
Tank Fuel Pump Assembly is one is for a Monte Carlo
C. In Tank
Fuel Pump Filter
NOTE: When using in tank fuel pump assembly
attaching pump to the unit be sure to use stainless clamps and
hi pressure hose to avoid the loss of pressure in the tank.
Having an improper size injector that is
too small or too big for your application, or incorrect fuel
pressure, or a Chip which has not been programmed correctly for
you application can also cause over heating or vapor lock.
You have to take into consideration the
cubic inches of your engine and horsepower. 305 Injector's are
19.9 lbs per hour, 225 to 275 hp 350’s use a 21.9 lb
injector, 300 hp to 375 hp like, ZZ4, 350 RamJet LT-1 and LS-1
use a 24.9 lb injector. The New LS-6 which are 405 hp use a 28
lb injector and the Big Blocks 425 to 550 hp use a 30 lb and
the New 502 RamJet uses at 38 lb injector. If you have a
used engine or injection it is best to have a professional
clean your Injector's with an ultra sound injector cleaner and
flow bench so that your Injector's will be cleaned and matched
evenly.
If your vehicle is running and you would
like to check your system, one of the best tools you could have
is an infrared heat gun to check the exhaust temperature of
each header tube. If all Injector's are good, they should be
within 35 degrees of each other at idle.They are normally
between 225 and 300 degrees. For example, if you have one or
more with a higher temp, you usually have a lean injector or
one that is dripping. Most Injector's will clean up without a
problem but 89 and later Tunedport and LT-1 Injector's are the
worst. If you have a problem with the Multi-tech
Injector's it is best to replace them all
as we have experienced a lot of problems with these.
 | ||
A.S&P Manual
Liquid Filled Fuel Pressure Gage for mounting on T.P.I/Ford
E.F.I (This is a good tool for trouble shooting fuel systems)
B. S&P14mm
and 16mm #AN6 fittings for Fuel Systems
C. S&P
Adjustable Fuel Pressure Regulator Kit for Tunedport.
This will allow you to put 305 Injector's
onto mild 350’s, also lets you put 350 Injector's on more
than stock type engines with a Chip that has been programmed
for that application.
A. Ford 19.9 lb E.F.I
B. Ford 460 29.9 lb
C. 85-86 Bosch/GM Injector
D. 87-88 Bosch/GM Injector
E. Multi-tech 89-91 Corvette 89-92
IROC/TA
F. 92-96 LT-1/4 Vette 93-97 LT-1
IROC/TA
G. 97-up Vette LS-1 / 98-up LS-1 /
IROC/TA
Note: Ford injection can be use in GM units
if you size the injector to the cubic inch and Horsepower or
vise versa
Street & Performance
#1 Hot Rod Lane
Mena, AR 71953
Phone 479-394-5711
Fax 479-394-7113
www.hotrodlane.cc
GAS TANKS
Rock Valley
Route 72 & Rothwell RD.
P.O Box 352
Stillman Valley, IL 61084
Phone 1-800-344-1934
Fax
815-645-2740
www.rockvalleyantiqueautoparts.com
When Using braided type hose be sure to
flush all hoses and lines with fuel to keep any fine particles
from plugging the injector screens.
TANKS
P.O Box 400
Clearwater, MN 55320
Phone 320-558-6882
Fax 320-558-4439
No Limited Engineering
1737 Production Circle
Riverside, CA 92509
Phone 909-275-9004
Aero Tanks
1820 Wild Turkey Circle
Corona, CA 91720
Phone 1-800-783-4826
Fax
909-737-7878
Stainless Steel Fuel Lines and Fittings
Snap-On Infrared Temperature Measuring
Instrument
RTEMP6PB
Tube Tech
101 Pedal to the Medal Lane
Mena, AR 71953
Phone 479-394-6466
Godman Hi-Performance
5255 Elmooze RD
Memphis, TN 38134
Phone 1-800-456-2369
A Hand held Infrared Heat gun is a great
tool for checking exhaust temperature between cylinders,
normally they should be within 35 degrees of each other. If
they are not then you may have a injector that is running lean
or rich.
