The stock Datsun 1200 points coil is 12V. So are the EI coils. The difference is that a ballast resistor is used by the old coil, as it is not designed to sink full current (it will overheat if the resistor is not used).

Says 12V right on it



When the points are closed, the voltage at the coil will read around 6V. When the points are open it will read 12V. Average indicated voltage (with engine running) will be around 9V.

datsunbeginner, it is not a must but it will run better.
Only need to change those thing if you want it to run optimum.
And the obvious reason that you are going to get feed back on your radio if you use plugs without the resistor.
Standard coil is a 9V one and EI is 12V and an EI coil has a different charge time.
Charge time is like dwell angle but you do not have points any more.
Every coil has different inductance and resistance and this gives different spark characteristics.
There is a lot of science behind ignition :(

Good to know, thanks DD

You don't need to.

Choices:
* Use stock 1200 coil with stock ballast resistor
or
* Fit EI coil and remove ballast resistor

The latter will make it a high-energy system, for better burning, less missfire. Then you can change the spark plugs to .13 mm type for the ultimate system.

Quote:

Can you be more specific? I have an electronic dizzy fitted but I have not upgraded the coil or spark plugs. I did not know you need to.

Mine is just the points replacement unit....not the whole dizzy.

Sure Dave.

Try search 'Datsun A12 Distributor'

And, voila first, second and third on the search results.

Remember to get the correct ignition coil and spark plugs for the new set up :)
The spark plug gap spec will also have to change :)
E15 pulsar is a straight fit.

Yeah I seen some body on DUDs on fb got one for $100 on eBay but I have Never seen the ones on eBay you got a link mate ??

Buy a full one off ebay? There are a fair few for sale one there, ranging from cheap to expensive.

E15 pulsar