Holley 550-811, Руководство по установке, Страница: 7 / 24

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17. Install new thermostat housing gasket, replace thermostat housing, replace the coolant hoses and refill the cooling system.
18. Attach the throttle cable.
9.3 Installing the distributor
Follow the manufacturer’s recommended procedures for the following steps:
1. Drop in the distributor making sure that the rotor aligns with marks made during disassembly. If you are installing a new
distributor, you will have to make sure it is properly timed.
2. Align distributor housing with marks made on block during disassembly.
3. Ensure the distributor seats properly against
manifold.
4. Ensure the distributor shaft is fully engaged in the
oil pump.
5. Bolt the distributor hold down clamp to the
manifold.
6. Replace the distributor cap.
7. Replace the spark plug wires and check that they
are in the correct firing order.
9.4 Vacuum Line Connections
1. Install vacuum hoses to the appropriate port on
the throttle body ( See Fig 2 ). Use the diagrams
made during removal of the existing fuel system
to locate the correct port. The vacuum ports of
the throttle body are labeled in the figure to the
right.
Figure 2
10.0 SUPPLY AND RETURN FUEL SYSTEM INSTALLATION
The MPI fuel system is a fuel metering system based on a time/pressure principle. The longer the injector is open the lager the
amount of fuel per fueling event is delivered to the engine. Fuel pressure also plays a direct role in how much fuel is delivered
to the engine. The higher the fuel pressure the more fuel is delivered during the fueling event. It is crucial for the proper
operation of a high performance MPI system that the fuel system be installed and sized correctly. Unlike a carburetor where
low-pressure fuel is delivered at an "as need" rate, the MPI supply system must continuously deliver fuel at the correct high
pressure in a volume greater than the engine requires at maximum load. The excess fuel the injectors do not use is returned to
the fuel tank. At idle, most of the fuel is returned to the tank, but a wide-open throttle (WOT) under full load nearly all of the fuel
is used by the engine and only a small amount is returned to the fuel tank. An improperly installed or sized MPI supply fuel
system may deliver enough fuel at low engine speeds but will starve the engine at WOT.
10.1 Fuel Supply/Return System Description
The high pressure fuel supply system consists of the following sub-systems: the fuel pick-up, a coarse fuel pump pre-filter, the
high pressure electric fuel pump, the 10 micron
high pressure fuel filter and a 3/8” ID fuel line (See Fig.3). The fuel pick-up
delivers fuel from the tank to the inlet of the fuel pump filter. From the filter the fuel line supplies filtered fuel to the high pressure
pump inlet. The high pressure electric fuel pump delivers pressurized fuel to the 10micron fuel filter, which in turn delivers
filtered pressurized fuel to the fuel rails, fuel injectors, and the fuel pressure regulator. The function of the regulator is to
maintain a constant fuel pressure of 300kPa (43.5psi). The outlet of the regulator returns the excess fuel back to the fuel tank.
The following section covers the installation of an in-line pump. Holley PN 12-920 is included with this kit. Holley includes both
a pre and post filter with the AVENGER MPFI system. Both of these filters are designed to connect to an EFI pressure rated
rubber
hose. They are not designed for “AN” style plumbing. If AN lines and fittings are used, obtain AN style filters. AN fittings
are available for the 12-920 pump. PN 26-160 contains two -6 pump fittings and PN 26-180 contains two -8 pump fittings.