EI Coil

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When using a Datsun Electronic Ignition distributor, you can use the stock 1200 coil as long as you leave the ballast resistor in place. But a high-energy Datsun coil has vastly better performance.

Also see: EI Wiring

Overview

Stock points coil is 1.3 ohms + 1.5 ohm resistor = 3.2 ohm, so it will draw 3.75 amps at 12 volts (I=V/R). This low amperage is to prevent the contact points from burning out. Except when starting, it sees a lower voltage because of the Ballast Resistor.

Points coil: 3.75 amps
Nissan IE coil: 12 amps (e.g. N12 Pulsar)

For best performance, use the Pulsar coil or other Datsun-Nissan coil from a high energy system. Or a compatible aftermarket coil. It draws 12.9 amps @ 0.93 ohms. Any 1980s era Datsun-Nissan EI coil should work just fine. With this type of coil, bypass the stock resistor. Remove it or simply jump a wire (short) across both terminals.

The coil from a Series 2 Bluebird (Datsun 910) or R31 Pintara with electronic dizzy may be used with Datsun/Nissan electronic ignition.

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NOTE: Bosch GT40R or GT40RT can be used as a direct replacement for the stock 1200 coil, but is less powerful than the stocker 1.3 ohm coil.

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Pulsar Coil aftermarket
Standard Motor Products UC12
Primary 200 Scale .7 - 1.4
Secondary 200 Scale 9.0k - 15.5k

N12 part number 22433-11M00 assembly
22462-11M00 Hitachi coil
22462-N7811 Hanshin coil

Bosch HEC715 (made in China) is the aftermarket coil for EI systems, and draws more current (0.41 ohms). Consider using an ignition relay as this will draw a peak 29 amps (I=V/R) -- although considerably less in usage.

MSD Blaster

For multi-channel coil drivers (not stock IE)
Low resistance, quick rise time for high-revving systems
Maximum Output: 43,000 volts
85:1 windings

MSD Blaster 2/MSD Blaster 3

Primary Resistance: 0.7 ohms 
Secondary Resistance: 4.70K ohms 
100:1 windings
Maximum Output: 45,000 volts