I got that info from 311s.org from a 9/18/04 post by JC:
"The 311 roadster uses a 12 volt system on everything thing except the
ignition ...go figure.
The use of the ballast resistor steps the input voltage from 12 to 6 volts,
for use of the 6 volt coil. You can simply remove the ballst resistor and
the short wire to the coil, and replace the 6 volt coil with a standard 12v
coil or a high output version coil. (40K volts will work most street
enginges nicely) Then just hook the old input (12v) wire from the ballast to
the coil + (and don't forget the 12v wire from the starting bypass as well )
Install a fresh set of points and 12v condensor.
If anyone is using a 12v coil with the ballst resistor still hooked up, you
maybe having issues with fouling and lack of performance"
Is JC mistaken?
Pete
-----Original Message-----
From: Adam Bradley [mailto:ambradley@frontiernet.net]
Sent: Monday, September 27, 2004 2:32 PM
To: Pete Peters
Cc: Datsun Roadsters list
Subject: Re: WIRED
I agree on why they're connected there (to have them wired to IGN ON),
however I don't believe the ballast resistor steps down from 12v to 6v.
I believe the purpose of the ballast is to step down 1.5v, with the coil
already having 1.5v resistance, for 9v total to the coil. Someone
correct me if I'm wrong.
[snip]
Pete Peters wrote:
[snip]
Also, if the purpose of the
>ballast resistor is to drop down the voltage to 6 volts for the
>ignition system
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