MSD 7761 Installation

MSD Advanced RPM Control Module

PN 7761

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Parts Included:

1 - Module 1 - Parts Bag

Required Items for Operation:

MSD Power Grid - PN 7730 MSD CAN-Hub - PN 7740

The Advanced RPM Control Module (ARC), PN 7761, has been designed to help prevent excessive wheel speed. In the event that engine and / or driveshaft rpm increase(s) at an undesirable rate the module’s software will retard timing and/or rev limiting in order to prevent excessive wheel speed.

INSTALLATION:

The ARC Module should be securely mounted near the MSD CAN-Hub. Plug the ARC CAN connector to an available port on the MSD CAN-Bus Hub, PN 7740. Do NOT cut the CAN-Bus connector wires.

1 - 8’ DS Sensor extension harness

Hall Effect Sensor - Racepak PN 800-SS-MSC-5 Driveshaft Collar - Call Racepak

The driveshaft sensor must plug directly to the 7761 module. MSD recommends using an 8-magnet driveshaft collar. Using less than an 8-magnet collar will result in less data for the processor to

work with and slower, less reliable corrections.

When connecting to a Racepak Data Recorder, the White/Blue and Brown wires will be connected to the driveshaft input on the Racepak. The wires (White/Blue and Brown) do not have a connector on them from the factory; two connectors are included in the parts bag of the module. Select and install either the 2-pin or 3-pin connector depending on which style is required by the data recorder being used. To install, push the pins (pre-installed on the wires) into the proper hole according to Figure 1 below. If these wires are not used, terminate the wires using heat shrink so that they cannot create a short.

The Yellow output wire is included in the same loom as the driveshaft output wires. The Yellow wire will switch to ground any time the ARC is controlling timing or rev limiting. The output circuit can support up to two amps continuous. This can be used to activate a light, solenoid, or boost controller.

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2 INSTALLATION INSTRUCTIONS

MSD 7730 Wiring

Wire

Lead Grouping Color Function Description

6-PIN CONN (TO Hub / Modules) RED MSD CAN HI Supplie s 12V s witched powe r

to add on modul e un its. Also communicates between modules and Power Grid System Controller. This connector is only used with modules added onto the system.

BROWN SHIELD

RED POWER OUT

BLACK MSD CAN LO

BLACK MSD CAN GND

3-PIN CONN (DS to MSD) Green Ground These wires send the signal to the

MSD from the driveshaft sensor.

Purple / Blue Signal

Red Power

LOOSE WIRES Brown Ground These two wires should be inserted (MSD to RACEPAK)

The connector must be assembled

using the two pin or three pin connector to accommodate the Racepak connector needed.

White / Blue Signal

Yellow Active Indicator Provides ground to a circuit any time

into one of the connectors supplied in the parts bag as shown in Figure

1. These wires send the driveshaft signal from the MSD to Racepak.

the unit is active by retarding or rev limiting.

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INSTALLATION INSTRUCTIONS 3

Figure 1 Installing 2-pin or 3-pin connector.

OPERATION

To program the ARC module start MSD View and connect to the 7761 with the ignition on.

• Turn on ignition power

• Connect 7730 to PC via USB

• Start MSD View

• In the Connect box select 7761

• Click “Connect”

MSD View will be display three main tabs; Settings, Driveshaft, and Crankshaft.

SETTINGS

This tab contains general settings for the ARC unit. After the items in this tab have been programmed the ﬁrst time they will not need to be changed unless hardware changes are made. The settings available here are:

Driveshaft Input – Calibrates the signal from the driveshaft sensor. The unit accepts 2, 4, 8,

or 16 magnet DS collars.

Output to Racepak – Calibrates the signal sent to the Racepak unit. Refer to your Racepak

software or user manual to determine the proper signal for that system. The unit can send a signal representing 2, 4, or 8 magnet DS collars.

Driveshaft Acquisition – Enable or disable the System Controller, PN 7730, from recording driveshaft

data.

DRIVESHAFT

If settings are entered for both Driveshaft and Crankshaft the module will limit accordingly for both inputs.

Settings made to these sub tabs control the engine according to driveshaft speed.

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