LUCAS INJECTION

Lucas MK1 and MK2 fuel / petrol injection

 

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 NOTES ON INSTALLATION AND CALIBRATION

RACING CARS


 

 

The torque curve over the speed range is determined very largely
by the design of the induction and exhaust systems. Engine tests
to establish optimum performance should always include an investigation
of the affects of varying intake pipe lengths and other dimensions.

( c )       Injectors

Illustrations LSK424/5 show alternative recommended locations for
the injectors in the intake manifold.     The most satisfactory and
convenient position for a particular application will be assessed
during the engine development programme.

( d )       Fuel Pump Alternative Installations

To meet the varying conditions of operation and possible space
considerations, the following schemes show how the fuel pump can
be selected and sited to suit any particular requirement.

( i )     Engine driven

The pump should be driven at approximately half
engine speed. Subject to a maximum driven speed
of 6000 rev/min. The pump should be mounted as low
as possible to achieve maximum positive pressure head
to pump inlet and to provide cooling. Inlet and outlet
of pump must be mounted in a vertical plane, outlet
uppermost, to insure that the built-in non-return
valve functions correctly
.

( ii )     Single motor-driven pump

( iii )     Twin motor-driven pumps delivering through a two-way
             non-return valve.

( iv )     One motor-driven and one engine-driven pump connected
             in series both with  internal or external by-pass
             valves (illustration LSK535).

( v )      One motor-driven and one engine-driven pump connected
              in series with by-pass valve in the engine-driven pump
              but no equivalent valve in the motor-driven pump.

( vi )     One motor-driven and one engine-driven pump connected
             in parallel with two non-return valves mounted
             separately ( illustration LSK449)


( vii ) 
   As ( vi ) but less the non-return valve associated with the
             engine-driven pump. This arrangement will suit
             installations where the engine-driven pump is situated
             high up.

 

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