Jackpot LS (Lite)

The Jackpot LS Lite EFI System is a standalone engine management system for 1997–2014 GM Gen III and Gen IV LS-based engines that use 58x/4x or 24x/1x crank and cam trigger patterns. It’s perfect for LS swaps or for upgrading and replacing your factory ECU or existing aftermarket EFI, giving you modern sequential fuel and spark control, wideband closed-loop learning (one sensor included), and the flexibility to support everything from stock street builds to performance combinations when tuned correctly.

Jackpot LS Lite EFI System

Modern EFI control built for real-world LS swaps.

Throttle Note: Jackpot LS Lite supports mechanical cable-operated throttle bodies only. Electronic drive-by-wire throttle bodies are not supported.

Jackpot LS Lite is designed for builders who want a clean, straightforward standalone LS system with a guided setup that gets you running fast, plus the ability to step into deeper tuning when your build demands it. Whether you’re swapping a 5.3 into a classic truck, refreshing an LS3 street car, or building a stronger combo with cam and airflow upgrades, Jackpot LS Lite is built to keep the install clean, the drivability strong, and the control in your hands.

At the heart of the system is Aces’ proven Gen 1 ECU platform, built for stable RPM control, reliable input and output handling, and consistent performance across changing voltage and load conditions. For stock and mild builds, the setup wizard and self-learning fueling strategy help eliminate the intimidation factor of tuning. For performance builds, the free Aces laptop tuning software unlocks full manual control and calibration refinement.

Lite Platform Overview (Gen 1)

Jackpot LS Lite uses Aces’ Gen 1 ECU platform with 10×14 fuel, ignition, and self-learn tables. This structure keeps tuning approachable and effective for the vast majority of street swaps and mild-to-moderate performance builds, with a straightforward learning strategy that can deliver strong drivability without requiring a deep tuning background.

Wideband note (Lite): The system includes one wideband O₂ sensor. You’ll install it on one bank during initial setup. Jackpot LS Lite can run dual wideband later by adding a second wideband sensor (sold separately) and installing a second bung on the opposite bank.

What It Is

Jackpot LS Lite is a standalone ECU system that replaces the stock ECU and wire harness (or an existing aftermarket ECU and harness) to control your LS engine’s fueling and ignition with modern wideband feedback and proven Gen 1 mapping. It supports true sequential fuel and spark on compatible LS trigger patterns, closed-loop wideband control using the included sensor, and tunable strategies for performance features like nitrous and boosted combinations when configured correctly.

Important note: Jackpot LS Lite does not include Gen 2-specific features like fuel level input, and it does not have onboard boost-control hardware to run a boost control solenoid. If you want boost control, use a standalone boost controller. The ECU remains compatible with boosted setups when tuned correctly with the appropriate sensors and strategy.

What It Fits

Jackpot LS Lite is intended for 1997–2014 GM Gen III and Gen IV LS-based engines that use either of the following crank and cam trigger combinations:

• 58x/4x crank and cam pattern
• 24x/1x crank and cam pattern

Common compatible engines include LS1, LS2, LS3, LS6, LS7, LS9, and many popular LS swap variants such as 4.8L, 5.3L, and 6.0L LS-based engines.

Compatibility is determined by the trigger pattern and engine features, not just the engine nickname, so confirming the crank and cam pattern is one of the best ways to validate fitment.

Important Fitment Exclusions

This system is not intended to run active VVT or AFM/DOD applications. These must be removed/deleted if your engine currently has these features and you plan to run the Jackpot LS Lite system on it.

Choose Your System Version

Jackpot LS Lite is offered in configurations based on transmission control requirements.

Throttle Type

Drive-by-Cable (DBC) Only: Jackpot LS Lite supports mechanical cable-operated throttle bodies only.

Transmission Control

Manual Transmission Version: For manual swaps or builds using a separate transmission controller.

Transmission Control Version: For builds where you want the ECU to control a compatible GM automatic transmission.

Supported GM transmissions (Transmission Control versions only):

• 4L60E (1996–2003)
• 4L65E (1996–2003)
• 4L67E (1996–2003)
• 4L80E (1994–2003)

What’s Included With Every Standalone System

Every Jackpot LS Lite standalone system includes the core parts needed to run the engine and begin closed-loop learning, with options to match your build style.

Each standalone system comes with:

• The Jackpot Lite ECU
• A full LS wiring harness
• Your choice of either a handheld touchscreen or a Bluetooth module
• One wideband O₂ sensor (second sensor optional for dual wideband)
• One weld-in O₂ sensor bung (second bung optional if adding a second sensor)
• A coolant temperature sensor
• A PDM (Power Distribution Module)
• A MAP sensor
• Additional accessories (installation and sensor-related items)

Harness details (important):

• Harness connector choice is EV1 or EV6 for standalone kits
• If you are buying a kit configuration that is not a standalone kit and comes with injectors, the harness and injectors are EV1 by default
• The harness always includes both 24x and 58x sub-harnesses, so you are covered for either trigger pattern supported by this system

What You Need for Most LS Swaps

Fuel System Requirements

The Jackpot LS Lite system operates between 43–60 PSI fuel pressure. Many LS setups run near 58 PSI nominal. Your pump, regulator strategy, and fuel plumbing must be capable of maintaining stable pressure under load.

While the system is set up for pump gas by default, it can be set up to run E85 via the free PC tuning software.

Note: The system does not support flex fuel, and using ethanol-based fuels may decrease the longevity of certain components.

Exhaust Weld-in Bung Installation (for O₂ sensor)

Wideband closed-loop control requires proper sensor placement. You will need the included wideband bung installed correctly, and the exhaust must be leak-free near the sensor to ensure accurate readings and stable learning behavior. (Refer to the manual for proper installation instructions.)

If you add a second wideband later, install a second bung on the opposite bank and configure dual wideband in the software/settings.

Electrical and Grounding

As with any standalone ECU, clean power and solid grounds are essential. Many drivability and sensor issues are caused by poor grounding, voltage drop, or noisy electrical systems.

The system comes with a PDM (Power Distribution Module) to help ensure proper grounding and provides a ground trigger output for your fuel pump and two additional outputs, which can be used for fans. The PDM uses IGBT transistors in place of solid-state or electromechanical relays, which helps to filter bad transient voltage, ultimately providing greater protection for your electronics that are connected to the PDM.

If You’re Running Boost or Nitrous

Jackpot LS Lite supports boosted and nitrous-capable setups when configured correctly with appropriate sensors and tuning strategies.

Boost control note (Lite): The ECU does not include onboard boost-control hardware for a boost control solenoid. If you want boost control, use a standalone boost controller. The ECU can still be tuned to properly fuel and spark-manage a boosted engine combination when configured correctly.

What It Supports (Aftermarket and Stock Compatibility)

Jackpot LS Lite is designed to work with common OEM and aftermarket LS swap components (excluding early LS sensors), as long as the combination fits the supported trigger patterns and does not require active VVT or AFM/DOD control.

Key Features at a Glance

• Wideband O₂ closed-loop control and learning (one sensor included; dual wideband capable with an optional second sensor)
• 8 injector drivers and 8 coil outputs for V8 sequential control
• Sequential fuel and spark with individual cylinder trims
• Boost- and nitrous-capable strategies when configured correctly (boost control handled via standalone controller)
• MAP sensor support for enhanced applications when configured appropriately
• Dual knock sensor control for real-time safety and timing optimization
• Rev limiter and 2-stage limiter (launch control)
• Dual fan control outputs for swap-friendly cooling control
• Supports both 58x/4x and 24x/1x crank/cam trigger combinations
• Free laptop software for advanced manual tuning and calibration refinement
• Seamless integration with Aces accessories (handhelds, digital dashes, CAN modules, and transmission control solutions where applicable)

Installation Expectations

Most installs can be completed in a little over a weekend when the fuel system plan is solid, the wideband bung is installed properly, and wiring is routed cleanly. More complex builds, such as transmission control setups, custom dash integrations, or high-power boosted combinations, will require additional time and setup.

A simple first-start checklist always helps: verify fuel pressure, verify grounds and voltage stability, confirm trigger pattern selection, confirm injector and ignition configuration, start and warm up, then allow closed-loop learning to begin.

Setup and Tuning Experience

Jackpot LS Lite is built to be approachable for first-time EFI builders without limiting experienced tuners.

Guided Setup (Handheld or Bluetooth)

After the install, initial setup is straightforward. Using the included handheld touchscreen (or the Bluetooth module if that’s the option you choose), you’ll run through the setup wizard and answer a few basic questions about your engine and configuration, such as cam type, ignition/timing setup, and other core inputs the ECU needs to start safely and learn correctly.

The wizard process is the same whether your build is stock or aggressive. Self-learning is intended for stock to mild combinations and is excellent for daily driving, cruising, and normal load transitions. Wide-open throttle pulls, dyno tuning, and higher-risk operation (especially with aggressive combinations or power adders) should be handled with manual tuning using the free laptop software.

The handheld or Bluetooth module is needed for initial setup, adjustments, and monitoring, but it does not need to remain plugged in once the system is configured and running correctly. Think of it as your setup and control interface: use it to configure, make changes, and view live sensor data whenever you want.

For stock and mild applications, the guided setup wizard and self-learning fueling strategy help deliver quick startup and strong drivability with minimal tuning complexity. Once the engine reaches operating temperature and transitions into closed loop, the system begins learning fueling in real time. After a few drive cycles, fueling accuracy and response continue to improve, and when you are satisfied with the results, you can lock the calibration.

For performance builds, the included USB cable and Aces’ free laptop tuning software give you full manual control, so you can confidently dial in aggressive cam profiles, power adders, and race-focused combinations with complete authority.

Takeaway

The Jackpot LS Lite EFI System is built for real swaps and real builders. It delivers fast guided setup for simple street builds and proven standalone control that can scale into deeper tuning when you need it, while keeping compatibility and install requirements clear so you can buy confidently and build without surprises.