MSD Boost Control Module
PN 77631
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Parts Included:
1 - Controller, PN 77631
2 - 12v Air Solenoids
2 - 75PSIG Racepak Sensor PN 810-PT-75GVT
Parts Bag
Parts Required But Not Supplied:
Power Grid Control PN 7730
4 Port CAN-Bus Hub PN 7740
CO2 Bottle and Pressure Regulator
FEATURES
• Two programmable boost curves for on the fly boost curve changes.
• Two electronically controlled air solenoids for precise wastegate pressure control.
• Direct plug into MSD’s CAN-Bus hub for ease of installation.
• Utilizes the Power Grid data acquisition to help fine tune boost curves.
• Built-in boost timing retard option.
• Two 75 psig sensors to measure manifold and wastegate pressure for high pressure applications.
• Overboost shutdown.
• Spool boost rev-limiter control.
OVERVIEW
The Boost Control Module allows fine tuning control of the engine’s manifold pressure (boost) in forced
induction engines by managing the pressure on top of the wastegate through a set of electronically
controlled air valve solenoids. The Module integrates with the Power Grid Controller seamlessly
through the 4 port CAN-Bus connector which minimizes wiring.
All Power Grid Modules work through MSD’s CAN-Bus system. The Power Grid Modules are plug
and play installations but may require extension harnesses for remote wiring.
Note: Do NOT cut the wires to the CAN-Bus Harness. In the event an extension harness is needed to
mount the unit in the desired location MSD offers the following extension harnesses-
2’ CAN-Bus extension PN 7782
4’ CAN-Bus extension PN 7784
6’ CAN-Bus extension PN 7786
The module has several programmable features such as Over Boost Shutdown, Spool/Launch RPM
activation once the spool pressure is achieved, Data Acquisition through the Power Grid Control,
and allows for two separate Boost Control Curves for “on the fly” switching. The Module utilizes the
built in data acquisition function of the Power Grid for fine tuning of the Boost Control Curves and the
Boost Retard Curve. The module uses two 75 psig sensors to monitor and data log boost pressure.
MSD
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2
INSTALLATION INSTRUCTIONS
INSTALLATION
LED
Figure 1 Single Wastegate Plumbing
MSD
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INSTALLATION INSTRUCTIONS
3
LED
Figure 2 Dual Wastegate Plumbing
Note: Use of a pressure regulator is required. Adjust the CO2 bottle pressure to no more than 20psi
above the maximum wastegate target pressure. MSD recommends Camozzi fittings throughout
the air pressure system.
WIRING
1. Mount the Boost Control Module with the supplied hardware.
2. Plug the six pin MSD CAN connector from the Boost Control Module into a free port on the MSD
CAN-Bus Hub PN 7740.
3. The orange wire switches to ground when active. Use a relay to activate devices that consume
more than 2 amps (Figure 3).
4. Route all wires away from heat sources.
5. Assemble the connectors. NOTE: The solenoids are not polarity sensitive.
6. Connect the red and white wires to the Pressure IN solenoid.
7. Connect red and yellow wires to the Pressure OUT (VENT) solenoid.
MSD
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4
INSTALLATION INSTRUCTIONS
LED
YELLOW
ORANGE
RED
Figure 3 General wiring
MSD 77631 WIRING
Wire Grouping
6 PIN CONN
(To CAN-Hub)
Single Wire
Wire Color
RED
BROWN
RED
BLACK
BLACK
ORANGE
Function
MSD CAN HI
SHIELD
POWER
MSD CAN LO
MSD CAN GND
SWITCHED GND
Description
Supplies 12v switched power to add on modules
on CAN-Hub. Allows communication with the
Power Grid System Control. This connector is
used only with Modules added to the CAN-Hub
System.(Figure 1)
Normally open and will switch to ground once
activated (2A max). Use of a relay is required for
higher current applications (Figure 3)
Control wires for the Pressure IN Solenoid.
Control Wires for the Vent OUT Solenoid.
Plug in for Wastegate MAP Sensor.
Solenoid Connector RED
WHITE
Solenoid Connector
MAP Sensor
Connector
MAP Sensor
Connector
MSD
RED
YELLOW
ORANGE
BROWN
BLUE
ORANGE
BROWN
GREEN
12V
SWITCHED GND
12V
SWITCHED GND
5V
GROUND
SIGNAL
5V
GROUND
SIGNAL
Plug in for Manifold MAP Sensor.
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INSTALLATION INSTRUCTIONS
5
PROGRAMMING THE BOOST CONTROL MODULE
MSD VIEW
The MSD View software programs the functionality of the Boost Control Module. While using the
program, position the mouse pointer over a function to display its description.
SAVES AND TRANSFERS
With the ignition ON and connected to the Boost Control Module changes are made in real time. You
can create and save numerous files on your PC and transfer them as needed.
The MSD View can display pressure in either KPa or PSI. To change the display units, click on
“View”=>”Units” and select “Metric (KPa)” or “English (PSI)” (Figure 4)
RED LED
The LED indicates that the module is communicating with MSD View. Without a connection to a PC
or Laptop the LED will be "Off".
Figure 4 Selecting Display Units
PROGRAMMABLE FEATURES AND SETTINGS
SETTINGS (FIGURE 5)
Over-Boost Shutdown: Allows the user to set an over-boost limit that will disable the ignition as the
programmed Manifold boost pressure setting is exceeded. The default setting is 75psi and
can be adjusted from 2.9psi to 75psi. Boost pressure must drop at least 1psi below that setting
for the ignition firing to resume.
Note: Setting the Over-Boost Shutdown to 75PSI disables the Over-Boost Shutdown.
Note: All references to pressure in the 77631 Boost Control Module refer to Gauge Pressure.
Boost Pressure Switch: The Orange wire switches to ground while the set boost pressure is exceeded.
The Orange wire can sink up to 2 amps of current (continuous) to ground(Figure 3). The default
setting is 75PSI and can be adjusted from 0psi to 75PSI.
Note: Use a relay for higher current applications.
MSD
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WWW.MSDPERFORMANCE.COM
• (915) 855-7123 • FAX (915) 857-3344
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