MSD 7562 Programmable Launch Boost Controller Installation - Manual (Page 16)

16 INSTALLATION INSTRUCTIONS
MSD IGNITION • 1490 HENRY BRENNAN DR., EL PASO, TEXAS 79936 • (915) 857-5200 • FAX (915) 857-3344
TEST EXAMPLE 6 - FIGURE 11
The next test plot was taken from a Buick Grand National on a chassis dyno. The Controller was
near optimum PID but this car had an ECU fuel problem after about 3-seconds under boost which
resulted in the engine running extremely rich and surging after about 4-seconds. The data up to
that point shows the response of the Boost Controller working very well. The boost pressure
TargetPSI was set at 14psi and the boost pressure data shows it rising quickly to about 14psi then
regulating at about 13.6psi with a very smooth PWM value slowly ramping with no saturation of the
PWM any where during boost operation.
Figure 11