MegaJolt Lite Jr.

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The Megajolt Lite Jr. (MJLJ) is a fully programmable, stand-alone ignition controller designed to control a Ford EDIS 4, 6 or 8 crank-fired ignition module. The result is a precision, digitally controlled distributor-less ignition system.

The MJLJ is an ideal ignition solution for carburated engines; it can also work in conjunction with compatible EFI systems.

Contents

Features

V4 Current Features

  • 10 x 10 ignition map, with full linear interpolation between values
  • Load axis calibrated by on-board Manifold Pressure (MAP) sensor or external Throttle Position Sensor (TPS)
  • Analog auxiliary input to further correct ignition map
  • Four user-defined output switches, which trigger on RPM or load
  • 'Shift light' output- for driving a dash-mounted shift light
  • External Rev-Limit trigger output (The Ford EDIS module has no 'rev limit' signal, so an external circuit to disable the ignition coil is required)
  • Modern, easy to use, and customizable Windows-based Configuration/Tuning software Screenshots
  • Dual, on-the-fly switchable ignition configuration
  • Fine-tune crank sensor position
  • Configurable cranking RPM advance
    • Load, modify and save Ignition Configuration
    • View, log and interact with engine runtime data
    • Interactively visualize and tune ignition map

System Diagram

Implementing a crank-fired ignition system is straightforward. Once you perform the necessary mechanical installation of the crank trigger wheel and sensor, the rest is a straightforward wiring process.

Image:megajolt_system.jpg

Software Screenshots

Main Screen

The main screen displays runtime data at a glance plus allows editing of the primary ignition map.
Image:Mjlj_v4_main_screenshot_connected.png

Interactive Tuning Window

You can interactively tune on the fly using the intuitive 3D tuning view.
Image:Mjlj_v4_operation_guide_tuning_view.png

Advance Correction

The Auxiliary input channel allows further adjustment of ignition advance on top of the base map. A typical use is to correct advance based on engine temperature, through the use of a temperature sensor, or react from a 0-5V signal provided by an external system.
Image:Mjlj_v4_advance_correction.png

Datalogging View

You can observe runtime data plotted against time, as well as save data to a log file for later viewing and analysis.
Image:Mjlj_v4_operation_guide_open_datalog.png


General Information and Downloads

Current Hardware

Version 4.x

Older hardware revisions

Version 3.x


Version 2.x

Ancient History

Retrieved from "http://www.autosportlabs.net/MegaJolt_Lite_Jr."
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