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
>>
>
>
>
!
>
>
>
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