The IGN-1A Smart Race Coil requires no CDI Ignition Module to produce 103 mJ per spark, with a longer spark duration (2.9 ms) than what you’d see with a capacitive discharge. They are the same coils used in the Huber Mustang, which makes over 250 hp per cylinder, as well as on our own land speed record holding LSR 240sx.
Each IGN-1A Smart Race Coil has a 19 amp IGBT ignitor built in and can be driven with a 5 volt logic level output – an MS3X or MS3-Pro will run them directly (set spark output to going high), and we recommend a 270 to 330 ohm pullup if you’re building a MegaSquirt 1 or MegaSquirt 2 to drive them and can fully charge with as low as 2.5 ms of dwell. Normally, you’d use them for a distributorless ignition as a coil per plug application, however they can be fired sequentially or every crank revolution (wasted spark coil per plug). If used as a single coil with a distributor, you may need to run a bit less dwell to prevent heat buildup from being an issue. Maximum recommended duty cycle is 40%. Requires HEI-type plug wire ends/ boots.
Here is the connector pinout:
A – Ignition signal from ECU
B – Logic ground, connect to ECU ground
C – Spark wire ground, connect to cylinder head
D – Power ground, connect to battery negative
E – 12 volt power
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.
Smart Coil specs:
Minimum voltage output (no load, at recommended dwell): 40,000 volts
Output energy: 103 mJ
Spark duration: 2.9 ms
Primary resistance: 0.5 ohms (not directly measurable)
Primary inductance: 4.8 mH (not directly measurable)
Secondary resistance: 8,500 ohms
Secondary inductance: 22.5 H
Turns ratio: 71.1
Maximum current: 19 amps
Maximum battery voltage: 17 volts
Nominal dwell: 3.0 ms
Excessive dwell or duty cycle may cause meltdown. As with any race coil, the manufacturer does not provide a warranty.