[TR] Ballast resistors and Electronic ignition

[Eric Butschek]

I dissagree...

ballast resisters were used with points ignitions in the 60's

when everyone went to electronic ignitions in the 70's... they lost the 
ballast resistor and the 2nd hot wire from the solenoid...

I mean what is the amperage draw through a Pertronix Ignition Modual?.... 
100 milli amps max? Over heat the coil?

This is a 76 TR6.. it allready had electronic ignition... there's no 
"hidden" ballast ressistor... the ones I've replaced are as big as my thumb 
and usually mounted to the firewall next to the coil..

I do agree that the coils probably should be matched to the system, check 
with the manufactor, as on motorcycles with new ignitions ( Dyna, IIS) that 
are fully computer chip controled, No centrificul advance, they do recomend 
higher impedence? coils.

Man I love this list!
Eric, Austin Tx.


----- Original Message ----- 
From: "Randall" <tr3driver at ca.rr.com>
To: <triumphs at autox.team.net>
Sent: Tuesday, November 06, 2007 9:04 AM
Subject: Re: [TR] Connecting red wire on Pertronix


>> I would add... I don't remember the year of the auto we are
>> discussing...
>> but if it has a "ballast resister", take it out and trash it
>> as electronic ignitions need a full 12 volt supply...
>
> Well, yeah ... except that with a Pertronix, if the coil originally needed
> an external ballast, it still does.  If you just remove the ballast, then
> the coil & Pertronix unit will overheat.  And, since this is a late TR6, 
> the
> ballast is part of the wiring harness, which is kind of needed for other
> things.
>
> But getting a full 12v to the Pertronix is exactly why John is looking for 
> a
> source of switched 12v.
>
> Randall
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