Bob Danielson wrote:
>
> On my car the ballast was a blue cylinder (about the size of a condenser)
> attached to the engine block right by the coil.
> Bob Danielson
> 75 TR6 - Current status at:
> http://pages.cthome.net/BobD
>
> -----Original Message-----
> From: John Duhart <DUHART@symbol.com>
> To: DANMAS@aol.com <DANMAS@aol.com>; mlibhart@feist.com
> <mlibhart@feist.com>; rdaniels@snet.net <rdaniels@snet.net>
> Cc: triumphs@autox.team.net <triumphs@autox.team.net>
> Date: Thursday, January 29, 1998 10:47 AM
> Subject: Re: Electronic Ignition
>
> >Hey All,
> >
> > Question, is the 'External Ballast' I keep seeing people talk about that
> red wire that is covered with a white mesh? I saw this wire on the TR6 75
> wiring diagram, and I've found this wire on my wiring harness. What is it's
> purpose?
> >
> >Later,
> >JHD IV
> >
> >>>> "Bob Danielson" <rdaniels@snet.net> 01/29 8:25 AM >>>
> >For what it's worth...... the PO put a Lucas Sport Coil on and left the
> >external ballast attached. After the car warmed up it would miss like
> crazy.
> >I tried regapping the plugs to no avail. I finally spotted the ballast
> (DUH)
> >and disconnected it. The miss went away.
> >Bob Danielson
> >75 TR6 - Current status at:
> >http://pages.cthome.net/BobD
> >
> >
> >-----Original Message-----
> >From: DANMAS <DANMAS@aol.com>
> >To: mlibhart@feist.com <mlibhart@feist.com>
> >Cc: triumphs@autox.team.net <triumphs@autox.team.net>
> >Date: Wednesday, January 28, 1998 11:59 PM
> >Subject: Re: Electronic Ignition
> >
> >
> >>In a message dated 1/28/98 8:49:11 PM Eastern Standard Time,
> >>mlibhart@feist.com writes:
> >>
> >>> Am I correct in my belief that the
> >>> Lucas Sport Coil will pose no problem due to the fact that it has
> enough
> >>> internal resistance??
> >>
> >>Martin,
> >>
> >>I have been running that exact set-up in my TR6 for about 5 years now,
> with
> >no
> >>trouble at all. When they say a ballast resister is required to limit
> coil
> >>current, I believe they are talking about protecting the coil, rather than
> >the
> >>control module. The instruction manual that came with mine also covers
> the
> >>XR3000, and says that unit has "a computer chip which controls coil
> current
> >>and dwell," thus eliminating the need for ballast. Since the XR700
> >doesn't
> >>have this feature, a separate ballast is required if the coil needs one.
> >>
> >>It's interesting that they give a figure of 3 - 4 ohms for a Lucas coil in
> >>your manual. In my older manual, they say "Coils with internal resistance
> >>will measure more than 1.5 ohms..." Obviously an error they have since
> >>corrected (well, not really an error, since 3 IS more than 1.5!!).
> >>
> >>Dan Masters,
> >>Alcoa, TN
> >>
> >>'71 TR6---------3000mile/year driver, fully restored
> >>'71 TR6---------undergoing full restoration and Ford 5.0 V8 insertion -
> >see:
> >> http://www.sky.net/~boballen/mg/Masters/
> >>'74 MGBGT---3000mile/year driver, original condition, slated for a V8
> soon!
> >>'68 MGBGT---organ donor for the '74
> >>
> >
> >
> >
>
> !
> >
> >
>
> >
I believe that is a radio noise suppressor. The ballast has to be in
series with the coil input I think.
Stu
74 TR6 80 TR8
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