Frequently Asked Question

A Spitronics ECU (Engine Control Unit) is a fully programmable, standalone computer that manages all aspects of an engine’s operation, including fuel injection timing, ignition timing, idle control, boost management, and auxiliary outputs. Unlike factory ECUs, which are locked to factory parameters, the Spitronics ECU allows custom calibration for modified engines, engine swaps, or motorsport applications. It supports multiple fueling strategies such as batch, semi-sequential, and full sequential injection, and works with a variety of ignition systems, including distributor-based, wasted-spark, and coil-on-plug configurations. The ECU can also integrate with additional systems like nitrous, boost control, and launch control.

The Spitronics TCU (Transmission Control Unit) is a standalone gearbox controller that provides precise, programmable control over electronic automatic and semi-automatic transmissions. It manages shift timing, solenoid actuation, hydraulic line pressure, torque converter lock-up, and manual override functions such as paddle shifting. By replacing the OEM TCU, it enables the pairing of transmissions with non-original engines and allows complete customization of shift characteristics for both performance and economy driving.

The Spitronics TxW (Throttle-by-Wire) unit is an electronic throttle controller that replaces the mechanical cable system with an electronic interface. It processes accelerator pedal input via dual-track potentiometers and translates it into precise throttle body movements. This allows for programmable throttle curves, adjustable sensitivity, and integration with safety features like limp mode, traction control, and cruise control. The TxW system is essential when using modern drive-by-wire throttle bodies with older engines or standalone ECUs.

Spitronics products cater to performance enthusiasts, race teams, custom car builders, off-road specialists, and professional tuners. They are ideal for projects involving engine conversions, kit cars, drift cars, drag racing, off-road buggies, and replacing obsolete or restrictive OEM control units.

Legality depends on local regulations. In many regions, a standalone ECU is permitted if the vehicle still meets emissions and safety requirements. Some areas require emissions testing, so tuners must ensure their calibrations meet these standards. Motorsport-only builds have no such restrictions.

Not always. If you are only managing an engine, you may only require the ECU. Transmission swaps to electronic automatics may need a TCU. Drive-by-wire conversions or modern throttle bodies require the TxW. Many advanced builds use all three for complete powertrain control.

All Spitronics units are designed, manufactured, and tested in South Africa using automotive-grade components. They are assembled under strict quality control to ensure reliability in both daily use and competitive motorsport environments.

Certain Spitronics ECUs can be configured for diesel control, handling injection timing, fuel pressure regulation, and boost management. Diesel systems require additional sensors and specific tuning strategies due to their compression ignition nature.