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IGN-1A Race Coil

From: $71.00


48" Color Coded IGN-1A Pigtail – optional

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IGN-1A Crimp Connector – optional

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SKU: IGN-1A Category: Brand:


Looking for a high powered ignition system? The IGN-1A Race Coil is a smart coil designed to put out 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.

IGN-1A Race Coils have a 19 amp IGBT ignitor is 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%.

Plugs are sold separately.  We offer either a 4 foot long flying lead pigtail or a pin and connector kit.

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.

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

Requires HEI-type plug wire ends/ boots.

IGN-1A Race Coils are very solid, robust coils that will do well for you if dwell is set up correctly. Excessive dwell or duty cycle may cause meltdown.  As with any race coil, the manufacturer does not provide a warranty.

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What is the pinout for this coil?

  • Here is the connector pinout:

A – Ignition signal from ECU
B – Logic ground, connect to ECU sensor ground
C – Spark wire ground, connect to cylinder head
D – Power ground, connect to battery negative
E – 12 volt power

Questions & Answers

  1. 0 votes

    We currently don't have a complete Miata-specific wiring diagram - please contact our tech support team with details of what sort of Miata you are installing these on, and we can go over the wiring in more detail.

  2. 0 votes

    We've had these coils used on methanol fueled engines running 40 psi of boost in the same RPM range; for a naturally aspirated build, you'll have no trouble as long as this is a four stroke.

  3. 0 votes

    Yes, pricing is for one coil.

  4. 0 votes

    Using these with our drop on harness would require making your own coil subharnesses from the 7 pin connector to the coils. So it's not a direct plug in, but it can be done.

  5. 0 votes

    This would work reasonably well if the engine is not particularly high winding. Spark energy will start to drop off above 5000 RPM.

  6. 0 votes

    The battery negative is the best point for noise suppression. Frame grounds can be affected by rust and other issues.

  7. 0 votes

    I would not recommend using this coil for forced induction distributor based applications. The duty cycle recommendations mean it will have less spark energy at high RPM compared to running a set of six of these coils or using a CDI type ignition.

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