The Joker Sequential EFI/CDI Master Kits (800 HP)

AY0967-D
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Pump Module Type: 255 In-line Pump System w/40' PTFE Hose

Pump Module Type

Manifold Style & Color: Silver Manifold for SBC (non-vortec)

Manifold Style & Color

Product Info

Joker EFI/CDI - The Most Powerful Multi-Port EFI System

Take your high-performance or boosted V8 to the next level with ACES EFI’s Joker EFI/CDI—the most powerful Multi-Port EFI system on the market! The Joker is the only EFI system that integrates a Digital Capacitive Discharge Ignition (DCDI) system inside the ECU, delivering unmatched spark energy, precision, and control. Whether you're running high compression, forced induction, or aggressive racing setups, the Joker’s high-voltage CDI system ensures maximum power and efficiency.

What Makes Joker EFI/CDI Unique?

Unlike traditional EFI systems that rely on weaker inductive ignition, Joker’s CDI system produces a hotter, more consistent spark that burns fuel more efficiently, leading to:

  • Superior combustion in high-boost or high-compression applications
  • Increased power and throttle response
  • Reduced misfires and improved fuel efficiency

Total Control for Performance Builds

Just like our Wild Card system, the Joker EFI/CDI works with most classic 8-cylinder engines, offering a customizable firing order in the start wizard and requiring a 7+1 timing setup for accurate ignition control. But what sets Joker apart is its built-in CDI technology and racing-grade features:

  • Integrated Digital CDI – Produces 150mJ spark energy output for maximum ignition performance
  • Massive Voltage Output – Primary voltage: 450-530V / Secondary voltage: 50,000V
  • 2-Stage Rev Limiter – Set a max RPM limit for engine protection, plus launch control for optimal starts
  • Burnout Mode – Holds RPM at a set limit for consistent, controlled burnouts

Three Configurations to Match Your Build

  • Standalone System – Includes ECU, wiring harness, handheld controller, and basic sensors
  • Top-End Kit – Adds an aluminum intake manifold (black or raw finish), Gambler Series distributor, ignition coil, injectors, throttle body, and fuel rails
  • Master Kit – Includes everything from the Top-End Kit plus a fuel delivery system of your choice

MP-EFI vs. TBI: Why Multi-Port is Superior

Throttle Body Injection (TBI) is outdated. It sprays fuel above the throttle blades, leading to uneven fuel distribution and weaker throttle response. In contrast, Joker’s true sequential MP-EFI meters fuel cylinder-by-cylinder, optimizing:

  • Fuel economy
  • Power output
  • Drivability

Built for All Power Levels – Stock to Race-Ready

  • Power Levels: Available in 500 HP and 800 HP configurations
  • Self-Learning: Stock to mild builds benefit from automatic tuning, while high-performance setups require custom tuning
  • Injector Options: Choose between EV1 or EV6 style injector harnesses (coming soon!)
  • Dual Wideband O2 Sensors: Ensures proper fueling across both banks for ultimate performance.

From street builds to high-boost race cars, Joker EFI/CDI is the ultimate all-in-one ignition and fuel control solution. No need for a separate CDI box—Aces EFI is the only company to offer EFI and CDI in one ECU. If you’re serious about performance, The Joker is the system you need!

Features:

  • Integrated digital CDI with 150mj spark energy output

  • 2-stage Rev limiter setting for max RPM, launch control, and burn out

  • 32-bit software (OEM standard) that manages input/output signals, voltage, and RPM faster and more consistently than competitors

  • Primary voltage 450-530 Volts, secondary Voltage 50000 Volts     

  • 5” full-color touchscreen handheld with built-in GPS speedometer

  • Integrated coil driver for ignition timing control (when using Aces’ coil and distributor)

  • Simple calibration wizard for initial setup- no laptop tuning required.

  • Self-learning fuel table

  • Dual fan control

  • Step retard for nitrous control

  • Boost compatibility (using laptop software)

  • Free laptop software available for pro applications

  • Compatible with Aces’ handhelds, dashes, CAN modules, and TCMs.

  • Bosch 4.9 WBO2 sensor

Computing Power

A robust ECU that utilizes our OEM standard 32-bit architecture. This allows the system to manage input/output signals, voltage, and RPM faster and more consistently than our competitors.

Plug 'n' Play

Not a tuning wiz? You don't need to be since we provide a wizard for you. Our self-learning* functionality means you only have to answer a few basic questions in the startup wizard, and then the ECU takes care of the rest. After about 30-60 minutes of idling and drive time, the system will build its own tune so you don't have to.

*Self-learning works best for stock-mild applications. For more aggressive applications and even some stock-mild applications, we offer free tuning software on our website.

It Takes Two

The Wild Card EFI system utilizes two WBO2 sensors to read each bank of your V8 engine. Dual wide-band sensors allow precise calibration of each cylinder bank, optimizing performance and allowing more thorough tuning of your engine without any compromises.

Master Kit Feature

(Fuel) Pump Up the Jam

Each Master Kit will come with a fuel system of your choosing. You can scroll down to read more about the available options below.

Aces Fuel Injection, Inc. 255 In-line Fuel Pump System with PTFE Hose 255 In-line Fuel Pump System with PTFE Hose

255 In-line Fuel System

A frame-mounted in-line pump with all of the necessary fittings and hose.

Aces Fuel Injection Command Center 2 + PTFE Kit + Pressure Sensor Kit Command Center 2 Surge Tank

Command Center 2

A surge tank system that allows you to keep your mechanical pump in place. A better option for classic trucks or other vehicles where the tank is hard to access.

Aces Fuel Injection Pump Module & 40' PTFE Hose Kit + Pressure Sensor Kit Tight Fit In-Tank Pump Module (255 LPH)

Tight-fit In Tank Pump Module

An in-tank fuel pump module available with or without PTFE hose.

Requires a return line to the tank.

Aces Fuel Injection Pump Module & 20' PTFE Hose Kit + Pressure Sensor Kit Tank Conversion Pump Module w/Internal Regulator (340 LPH)

Tank Conversion Fuel Pump Module

An in-tank fuel pump module with an internal regulator. Ideal for fuel cells.

Does not require a return line to the tank.

How do I set up and program my system?

Interface Options

Our EFI systems are self-learning for most stock-to-mild engine builds. You’ll use one of the included interface modules (depending on the option selected at purchase) to complete the initial setup and make adjustments on the fly. The startup wizard will prompt you with 6–12 setup questions, after which the self-learn feature takes over.

Additional fine-tuning may be required later, depending on your specific build.

Bluetooth Module

Compatible with Android and iOS* devices and plugs into the CAN connection on the main harness.

Android is available via download here, or in the Google Play Store Fall of 2025.
iOS is available Fall of 2025

5" Handheld (3rd Gen)

  • Capacitive touch screen
  • 64-bit processor
  • 1920x1080 resolution
Aces Fuel Injection Dash 7" Handheld (2nd gen)

7" Handheld (2nd Gen)

  • Capacitive touch screen
  • 32-bit processor
  • 1024x600 resolution

Most common questions

Quick answers to our most common queries for this product.