V8 GM/Chrysler Hemi Small/Big Block 8 x Individual High Output IGN-1A Inductive Coil Harness

Milspec Ignition Power: V8 IGN-1A Inductive Coil Harness

For high-horsepower V8 applications, the ignition system must be unfailing. The V8 GM/Chrysler Hemi Individual IGN-1A Harness is the professional-grade solution for providing power and signal to a full set of eight high-output coils. Designed for LS-swap, LT, and Gen III Hemi engines, this harness is constructed to “Milspec” standards, featuring high-quality Tefzel wiring. This is a critical component for any standalone ECU integration where the goal is to utilize the industry-leading IGN-1A coils to eliminate spark blow-out and provide the energy needed for extreme closed-loop boost control and high-RPM performance.

Engineering Principles: High-Current Capacity and Shielding

The IGN-1A is a Inductive ignition coil that requires a massive amount of current to reach its full 100mJ+ energy potential. This harness is engineered to handle that load, featuring a high current 75A TE power relay. This relay ensures that the coils receive a stable 12V supply directly from the battery, bypassing the lower-capacity factory wiring. The use of Tefzel (ETFE) insulation provides superior resistance to heat, chemicals, and abrasion compared to standard automotive wire. Furthermore, the harness is designed to minimize EMI (Electromagnetic Interference), which is vital for maintaining the integrity of the ECU’s sensor signals in the electrically “noisy” environment of a V8 engine bay.

Operational Benefits for Big Block and Small Block V8s

By moving to eight individual IGN-1A coils with this harness, the tuner gains absolute control over the combustion process. In a standalone ECU integration (such as a Haltech Elite 2500 or Nexus R5), this allows for sequential ignition and individual cylinder timing trims. This is a vital tool for detonation protection; the tuner can optimize the timing for each cylinder to account for minor variations in airflow or cooling. For those using forced induction, the increased spark energy allows for a cleaner burn and better throttle response. This harness is a direct plug-and-play solution for Haltech V8 terminated harnesses, ensuring that the harness integration is fast, reliable, and professional.

Fitment and Component Integration

This harness is a direct Plug ‘n’ Play solution for adding IGN-1A coils to an E2000/2500 Haltech V8 Terminated Harness, the Elite + REM 16 Injector harness, or the Elite + REM Flying Lead harness. It is configured for the firing orders of GM and Chrysler Hemi Small/Big Block engines. It is important to note that ignition coils are NOT included with this harness; the builder must order 8 x HT-020114 to complete the system. This harness provides the essential electrical infrastructure, including the relay and fuse protection, needed to safely and effectively drive these high-output ignition components.

Technical Specifications

Summary & Includes

The V8 IGN-1A Ignition Harness is the ultimate electrical foundation for high-power V8 ignition. Includes: Terminated Tefzel Milspec Harness with 75A Relay. Note: Please order 8 x HT-020114 Coils separately to complete the installation.