MSD 7562 Programmable Launch Boost Controller Installation - Manual (Page 4)

4 INSTALLATION INSTRUCTIONS
MSD IGNITION • 1490 HENRY BRENNAN DR., EL PASO, TEXAS 79936 • (915) 857-5200 • FAX (915) 857-3344
Figure 1 Wiring the Boost Launch Controller.
OPERATION AND SET UP
The spring in the waste gate must be the lowest rated spring available in order to achieve minimum
pressure. (Unless you are using CO2 to set a minimum and maximum boost.) The programmed
boost pressure will only be capable of increasing boost above the minimum boost pressure that is
set by the waste gate actuator spring value. There must be a pressure relief valve in the intake duct.
This should be set at the maximum desired pressure or 1-2-psi greater. Also, two Normally Closed,
12 volt solenoid valves with 3/32" orifice must be installed between the waste gate actuator and the
manifold (or CO2) on the spring side.
The MSD Controller can control both types of waste gate actuators with a single or dual pressure
ports. The control solenoids are always connected on the spring side of the waste gate actuator. If
your waste gate actuator has pressure control on both sides of the waste gate actuator refer to
Figure 3. If it has only one pressure port, refer to Figure 2. For optimum control, Figure 4 shows a
dual port actuator with a CO2 bottle giving it full adjustability.
The MSD Controller will regulate the waste gate actuator to maintain the desired boost pressure. The
boost pressure value is a clamp value, in that the turbo or blower must be developing at least the
programmed boost pressure value to open the control valve to open the waste gate. This allows you
to program a burnout boost pressure maximum, a launch maximum boost pressure and then to
provide a smooth pressure ramp up to the maximum boost pressure by plotting a pressure vs. time
curve with up to 32 points entered in .1 PSIA increments, and .01 second increments.