MSD 6530 Digital Programmable 6AL-2 Installation - Manual (Page 11)

INSTALLATION INSTRUCTIONS 11
M S D
• W W W . M S D P E R F O R M A N C E . C O M • ( 9 1 5 ) 8 5 7 - 5 2 0 0 • F A X ( 9 1 5 ) 8 5 7 - 3 3 4 4
DROP RPM
This option is for Manual shift applications using the clutch between shifts. This RPM value will set
up a window so the Launch limiter will not reactivate when using the clutch between shifts. This RPM
will be set lower than Launch RPM.
CONNECTING THE REV LIMITS
When you connect the Burnout and Launch, it is important to pay close attention to the wiring. The
Light Blue wire is responsible for the Burnout Rev Limit. The Dark Blue is responsible for turning on
the Launch Rev Limit. The Launch Rev Limit will override the Burn Rev Limit if both are activated.
LAUNCH RPM
The launch RPM is activated by applying
12 volts to the Launch Wire (Dark Blue
Wire), this is normally wired to a trans-brake
button, brake line lock switch, or clutch
switch on a manual shift transmission.
When 12 volts is removed from the Launch
Wire the launch rpm will release and the
Max RPM Value will be in control of the
engine RPM.
LAUNCH RETARD
The launch retard can be activated multiple
ways depending on the application. In
order to customize this feature to your
application there are 3 adjustments that
need to be made (Figure 11).
1st Delay: This is a time delay that starts
counting once 12 volts is removed from the
Launch Wire (Dark Blue Wire). If this delay
is set at 0 seconds, then the launch retard
will become active as soon as 12 volts is
applied to the Launch Wire. If you have
anything other than 0 seconds (example:
.10 or more), then the launch retard will not
become active until 12 volts is removed
from the Launch Wire and the Delay time
is achieved.
2nd Retard: This is the amount of timing that will be retarded once 12 volts is removed from the
Launch Wire. The retard amount will become active when 12 volts is applied to the Launch wire if the
Delay is set to 0 seconds.
3rd Ramp: This adjustment determines the rate (over time) that timing will be ramped back into the
motor until the run curve timing is met. When the Launch Wire is removed from 12 volts and the Launch
Delay value is timed out then timing will begin ramping back into the motor. The Ramp determines
how fast this is done.
Always remember all timing retards (Launch, Step, Boost and the Run Curve retards) are all added
together in the total retard amount. When using multiple retards be sure to check the timing in order
to insure that they don't overlap.
Figure 11 Launch Retard Delay Example.