High Power Inductive Coil with built-in ignitor. Produce 103 mJ per spark, with a longer spark duration (2.9 ms) than what you’d see with a capacitive discharge Built-in ignitor with external heat sink Requires HEI-type plug wire ends/ boots. Compatible with most brands of HT lead Box Contents 1 x IGN1A Smart Coil 1 x Mating Connector Kit Link to User Guide Connector Pinout: _x000D_ _x000D_ A – Ignition signal from ECU _x000D_ B – Logic ground, connect to ECU ground _x000D_ C – Spark wire ground, connect to cylinder head _x000D_ D – Power ground, connect to battery negative _x000D_ E – 12 volt power _x000D_ _x000D_ The coil dwell starts when a 5 volt signal is applied to pin A and the coil fires when the voltage drops to zero. The signal is similar to an LSx coil, although it does need a bit more current to trigger. _x000D_ _x000D_ Smart Coil specs: _x000D_ _x000D_ Minimum Output Voltage (no load, at recommended dwell): 40,000 volts _x000D_ Maximum Output Voltage: up to 81,000 volts (+/- 10%) _x000D_ Output energy: 103 mJ _x000D_ Spark duration: 2.9 ms _x000D_ Primary resistance: 0.5 ohms (not directly measurable) _x000D_ Primary inductance: 4.8 mH (not directly measurable) _x000D_ Secondary resistance: 8,500 ohms _x000D_ Secondary inductance: 22.5 H _x000D_ Turns ratio: 71.1 _x000D_ Maximum current: 19 amps _x000D_ Maximum battery voltage: 17 volts _x000D_ Nominal dwell: 3.0 ms _x000D_ _x000D_ Excessive dwell or duty cycle may cause meltdown. As with any race coil, the manufacturer does not provide a warranty. _x000D_ _x000D_ Link User Guide: https://linkecu.com/documentation/IGN1A%20Smart%20Coil.pdf