HPI4 – High Power Igniter – 15 Amp Quad Channel with Plug & Pins

Bespoke Ignition Power: HPI4 Igniter with Plug & Pins

The HPI4 High Power Igniter – 15 Amp Quad Channel is the high-performance switching module designed for the ultimate 4-cylinder ignition system. This SKU is tailored for professional loom builders, providing the robust 4-channel HPI module along with the corresponding AMP 26-Pin 2 Row Superseal Connector and Pins. This allows for a completely custom harness integration for engines like the SR20DET, 4G63, or B18C, ensuring that 15 amps of switching power per channel are delivered through custom motorsport-grade wiring. It is the definitive solution for achieving high-energy spark and detonation protection on aggressive turbo or high-compression builds.

Engineering Deep-Dive: MOSFET Signal Precision

The HPI4 acts as the critical bridge between the standalone ECU integration and the ignition coils. It receives a 0-5V logic trigger pulse and uses a high-speed MOSFET array to switch the ground path for the coils. This Analogue-to-Digital interface logic is designed for minimal delay and high thermal stability. By providing the module with the loose plug and pins, Haltech ensures that the harness integration can utilize Milspec (Tefzel) wiring without any unreliable splices. This is vital for maintaining Ignition Timing accuracy at high RPM, where even the smallest resistance can cause spark jitter and robbed horsepower. The unit is housed in a precision aluminum heatsink designed to handle the thermal load of sustained high-boost operation.

Operational Benefits for 4-Cylinder Tuning

For the tuner pushing the limits of the 4G63 or K-swap platforms, the HPI4 provides the electrical muscle needed to prevent spark blow-out. By providing a stable 15-amp capacity, the HPI4 ensures that even with aggressive fuel map calibrations or high boost levels, the spark remains strong and consistent. This consistency allows the calibrator to lean out the mixture safely and find the Maximum Brake Torque (MBT) timing timing with absolute confidence. Furthermore, the HPI4’s independent 4-channel architecture supports full sequential ignition, allowing for individual cylinder timing trims—a vital feature for Protecting high-load cylinders from detonation.

Technical Specs Table

Summary & Includes

The HPI4 with Plug & Pins is the master-builder’s prerequisite for 4-channel ignition amplification. Includes: 1 x HPI4 Quad-Channel Module and 1 x Matching AMP 26-Pin Superseal Connector with Pins. Note: Ideal for building custom motorsport-grade ignition harnesses for sequential firing.