HPI4 – High Power Igniter – 15 Amp Quad Channel Module Only

Core Ignition Switching: HPI4 4-Channel Module Only

The HPI4 High Power Igniter – 15 Amp Quad Channel Module Only is the standalone power stage designed for high-output 4-cylinder and 2-rotor engines. Featuring a massive 15-amp continuous rating per channel, this module is the definitive solution for driving high-performance “Dumb” inductive coils in standalone ECU integration projects. It is a critical component for SR20DET, 4G63, and K-swap builds where the factory ignition drivers are inadequate. This SKU is intended as a replacement module or for professional builders who are building their custom harness integration around the industry-standard AMP Superseal connector.

Engineering Principles: Signal Amplification and EMI Shielding

A high-power igniter acts as a high-speed switch, taking a low-current logic signal from the ECU and providing a high-current ground path for the coil primary. This Analogue-to-Digital interface (logic signal to switching) is where the HPI4 excels, providing zero signal delay and robust protection against high-voltage flyback. By centralizing the ignition switching in this module, the builder can significantly reduce EMI (Electromagnetic Interference) that could otherwise interfere with crank and cam sensors. The unit is housed in a high-density aluminum heatsink that acts as a thermal bank, ensuring the power stage remains within its safe operating window even at extremely high engine speeds.

Operational Benefits for High-RPM Tuning

The primary benefit of the HPI4 is Reliability. In a fuel map calibration scenario, the tuner needs to know that the spark energy is perfectly consistent for every combustion cycle. The HPI4’s 15-amp capacity ensures that the magnetic field in each coil is fully saturated, providing a powerful spark that prevents the high-RPM misfires common in high-boost SR20 or Rotary builds. This consistency allows the calibrator to find the Maximum Brake Torque (MBT) timing timing cell after cell. Furthermore, the 4-channel design supports full sequential firing, which is essential for modern standalone ECU integration safety features, including individual cylinder trims and detonation protection.

Technical Specs Table

Summary & Includes

The HPI4 Module Only is the high-current foundation for professional 4-channel ignition amplification. Includes: 1 x HPI4 Quad-Channel Module. Note: This SKU does not include the connector set or wiring loom; see HT-020034 or HT-020035 for full kits.