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NO PART OF THIS DOCUMENT MAY BE REPRODUCED WITHOUT PRIOR AGREEMENT AND WRITTEN PERMISSION OF
If the fuel rail is too small and you have large injectors, this can create a pulse or wave in the fuel rail allowing fuel
starvation on some cylinders.
Plumb the fuel system such that fuel is pushed through the filter (pressure side of the pump). Pulling fuel through a
filter can cause cavitation. If a filter is used on the inlet side of a rail-mounted fuel pump, a filter rating of 160
microns MINIMUM should be used.
It takes approximately ½ lb of gasoline per hour to support 1 hp. This is "Brake Specific Fuel Consumption" (BSFC).
For example if the engine is making 340 peak HP, and the fuel flow is 170 pounds per hour, the BSFC is .5. Select
fuel pumps and injectors with a 20% safety factor over peak HP.
FUEL DELIVERY
1. 302 engines 570-600 cfm carb
2. 30 lb/hr. injectors
COOLING SYSTEM CONSIDERATIONS/COMMON PROBLEMS
Engines that make higher horsepower create more heat.
Fill the cooling system at the highest point in the cooling system. Failure to do so will create air pockets. These air
pockets can then create hot spots. Hot spots will promote improper combustion, which can cause engine failure.
Improper pulley size makes the fan and water pump turn too slow or too fast. Production water pumps normally run
at 20% over engine speed and do not perform well over 5000 engine rpm. Underdrive pulleys generally reduce
water pump speed to 85% of engine rpm and may not provide enough water flow to cool the engine.
The radiator must have enough area to dissipate the heat created by the engine.
If the fan size is too small, it will not flow enough air across the radiator to properly dissipate heat. Fan shrouds
increase the effectiveness of the fan significantly.
Location can also affect airflow through the radiator at different vehicle speeds.
COOLING SYSTEM
STEP 1:
Fill cooling system (distilled/deionized water recommended).
STEP 2:
The fill point of the cooling system must be the highest level of the cooling system.
STEP 3:
Check for leaks.
STEP 4:
After running engine and the cooling system is leak free, drain water and add appropriate amount
of water/coolant.
FLYWHEEL, CONVERTER, AND TRANSMISSION CONSIDERATIONS
Installing the wrong flywheel for the balance factor of the engine will cause vibration and engine damage.
Measure the input shaft length. Input shaft length that is too long can force the crank forward and damage the engine
thrust bearing. Input shaft length too short will not have enough engagement.
Improperly installing the torque converter can force the crank forward damaging the engine thrust bearing. This is
Factory Ford shop manuals are available from Helm Publications, 1-800-782-4356
Techline 1-800-367-3788
M-6007-X2302E
Crate Engine
GUIDE
FORD PERFORMANCE PARTS.
Page 20 of 25
IS-1850-0632
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