MSD 2-Step Launch Control

for GM LS Series Engines

PN 8733

Note: The 2-Step Launch Control is designed as a momentary low-rpm limiter. It will not provide nor

modify any overrev protection.

This MSD 2-Step Launch Control is designed for GM LS Series Engines with Coil-per-Cylinder ignitions.

It can be used with 24x or 58x trigger wheels. The 2-Step Control will provide consistent launches and

quick 60-foot times. RPM adjustments are made via two rotary switches located on the harness side of

the unit. The adjustment range is from 1,000 - 10,900 rpm, in 100 and 1000 rpm increments. The LED will

illuminate when the launch rev limit is active.

Note: It is recommended to have the service manual for your vehicle.

Note: The engine rpm must drop more than one third of the set launch limit in order to activate. For

example, if the launch limit is set at 3,000 rpm, the engine speed must drop below 2,000 rpm

in order for the launch limit to become active (one third of 3,000 rpm is a 1,000 rpm drop).

Caution: Keeping the engine on a lower rpm limit may cause the Check Engine light to come on

and could potentially damage the catalytic converter.

BLUE

When grounded, the launch feature will be active.

WHITE/BLUE

When switched to 12 volts, the launch feature will be active.

ACTIVATION WIRES

LED

The built-in LED will illuminate when the 2-Step Launch Control is activated.

CONNECT THE ACTIVATION WIRE

The launch rpm limit can be activated through a ground or a 12 volt source.

Ground: Switch the Blue wire to ground to activate the launch limit.

12 volts: Connect the White/Blue wire to 12 volts to activate the launch limit.

Parts Included:

1 - 2-Step Launch Control

1 - 1-Pin Wire Harnesses

The LS 2-Step has a built-in rpm drop circuit that prevents the low rpm limit from activating during

gear shifts (when connected through the clutch switch). In order for the limit to activate, it must see

an rpm drop of more than 1/3 the set amount. For example, if the limit is set at 3,000 rpm, the limiter

will not activate unless it sees more than a 1,000 rpm drop.

MOUNTING

The 2-Step Control can be mounted in any position but keep in mind to mount it so the rotary dials

are accessible for adjustments. Hardware is supplied for mounting. Before mounting the unit, con-

firm that the wiring harnesses reach their connections.

Connect the two main harnesses between the main coil connectors. (The connectors are interchangable.)

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