MSD Ignition 2-Step Launch Control for GM LS Engines — 8733 Module, Adjustable Launch RPM, Works with Factory Coils

The MSD Ignition 8733 is a dedicated 2-step launch control designed for GM LS engines to deliver repeatable, adjustable launch RPMs and firmer, more consistent holeshots.

If you run a GM LS-based streetcar or race vehicle and want predictable starts without reworking coils or ECU maps, the MSD 8733 2-step gives a simple electronic way to hold engine RPM at a preset level during launch. It integrates with factory coils and supports common crank trigger systems, so installation is straightforward and it works with popular LS platforms.

How does the 8733 help me get better launches?

The 8733 holds engine speed at a user-set launch RPM, preventing engine bog or over-rev during the initial launch phase. That lets the driver apply full throttle while the ignition strategically controls cylinder firing to maximize traction. The result is more consistent 60-foot times and reduced wheelspin variability from run to run.

• Programmable launch RPM for repeatable holeshots
• Works with factory coils to simplify wiring
• Limits ignition to manage power during clutch or traction engagement

Will it install easily on my GM LS engine?

The unit is built to connect to stock LS coils and accepts common trigger wheel inputs, so it fits most GM LS installs without needing aftermarket coils or complex adapters. Basic wiring skills and an understanding of ignition trigger signals are helpful for proper setup. Installation guides and wiring diagrams for LS systems make the process straightforward for experienced DIYers or shops.

• Direct connection to factory LS coil packs
• Compatible with 24x and 58x crank trigger wheels
• Compact module design eases mounting in engine bays

What trigger systems and vehicles are supported?

The 8733 supports both 24x and 58x crank trigger wheels, covering the most common GM LS crank sensors and aftermarket trigger setups. That flexibility allows use on a wide range of GM LS blocks, including swapped and built applications. Confirm your crank trigger type before ordering to ensure plug-and-play compatibility.

• Works with 24x and 58x trigger wheel signals
• Designed for GM LS family engines and swaps
• Ideal for both streetstrip and competition setups

How do I set and adjust the launch RPM?

Settings are adjusted on the control module or via its interface according to the included instructions; you pick the RPM you want the engine to hold for launch. Fine-tune the RPM based on traction, tire compound, and driver preference. Once dialed in, the 2-step delivers repeatable engagement each run.

• Adjustable launch RPM for tuning traction behavior
• Simple controls for in-garage setup and track tuning
• Maintains chosen RPM during clutch engagement or throttle stab

Who is this for: The MSD Ignition 8733 is aimed at racers, street-strip enthusiasts, and LS swap builders who want a reliable, easy-to-install 2-step launch control that interfaces with stock coil packs and common crank triggers. If you need consistent launches without replacing ignition hardware or doing extensive ECU rewrites, the 8733 provides a pragmatic solution for improving holeshots on GM LS-powered cars.