Inductive Coil DIYAutoTune

Here's a hot coil at a reasonable price. The IGN-1 shares the same internal core as an IGN-1A, but without the built-in ignitor. This can be used for distributors or coil per plug. Use with BIP373s or an external ignition module.

IGN-1 Inductive Coil is vibration resistant, can be mounted at any angle and is one of the few performance coils you'll find in this price range to add a secondary ground connection to isolate the primary side from the secondary. It uses standard HEI type spark plug wire boots.
Here is the IGN-1 pinout, using the pins marked on the connector (sold separately):

• A (towards edge of coil) – Positive terminal, to battery power.
• B (center) – Negative terminal, wire to ignition module.
• C (towards inside of coil) – Secondary ground, connect to cylinder head.

Note: For capacitive discharge ignitions like an MSD box, see our IGN1-CD.
Electrical specifications:

• Primary Resistance: 0.5 O +/- 10 perccent
• Primary Inductance: 4.8 mH +/- 15 perccent
• Secondary Resistance: 8.5 kO +/- 20 perccent
• Secondary Inductance: 22.5 H +/- 20 perccent
• Output Voltage: 41 kV +/- 10 perccent
• Output Energy: 118 mJ +/- 7 perccent
• Peak Secondary Current: 100 mA +/- 7 perccent
• Arc Duration: 3.2 mS +/- 10 perccent
• Turns Ratio 71:1
• Standard Dwell: 3.0 mS