MoTeC M8 - Manual (Page 24)

22 Installation
It is very important that the pump is capable of maintaining the correct fuel
pressure at full power otherwise the engine could be damaged due to a lean
mixture.
A 600 hp engine requires a flow rate of approximately 250 lb/hr for petrol or
gasoline.
Notes
The pressure pump must be lower than the outlet of the swirl pot.
Prime the pump with fuel before use.
The pumps flow capability is dependant on the required pressure, the flow
capability of the pump will be less at higher pressures. A small pump will
maintain correct pressure at light load but will not maintain correct
pressure as the flow requirement increases.
On boosted engines the pressure required from the pump increases with
boost pressure because the regulator maintains constant pressure above
manifold pressure.
Avoid running the pump dry as this may destroy the pump.
Filters
The filters are necessary to ensure that the fuel pump is not damaged and to
ensure that the injectors do not become blocked.
The strainer before the pressure pump is essential to prevent the pump
from seizing. A strainer is used because the pressure pump won’t suck
through a paper filter.
Fuel Lines
The fuel feed lines must be high pressure type and should be at least 8mm
(5/16 inch) diameter. The return lines should also be at least 8mm (5/16 inch)
diameter to ensure that the fuel is easily returned to the tank.
Use proper high pressure hose clamps to ensure that the lines do not blow off
under pressure.
Keep the fuel lines as cool as possible to avoid fuel vaporisation. The
temperature of the fuel will also affect the mixture due to the change in fuel
density.
Avoid fire risk by ensuring that all hoses and fittings are in good condition and
installed correctly.