Nory:
I just about got beaten to the punch. Very briefly, early (pre
72) MG's used a coil (DLB101) that ran happily on full operating voltage
(9-15 volts). From approx 72 on to meet the emmission cycle
requirements they went with a lower voltage coil (DLB102) that under
cranking conditions received full battery voltage. Under running
conditions the coil was powered through a resistive wire. (Note, not a
ballast resistor). Many American cars have been using this system for
years. It allows a hotter spark under cranking conditions when the
battery's voltage is drawn down by the load of the starter motor.
The important thing is that the Lucas Sports Coil is designed to
replace the DLB101 12 volt coil in an unballasted system only. If you
are using the DLB105 sport coil in a vehicle newer than 72 you must
bypass the resistive wire. If not the coil will not be delivering to
it's full potential.
Lucas does not (as far as I can tell) offer a high performance
coil for a ballasted system.
Hope this answers any questions.
Kelvin.
-----Original Message-----
From: Nory@webtv.net [mailto:Nory@webtv.net]
Sent: Monday, November 09, 1998 1:36 PM
To: doddk@mossmotors.com
Cc: mgs@autox.team.net; steve@shoyer.com
Subject: RE: Lucas Sport Coil (was: Early Wiper Arm Removal)
Kelvin says:
>You can use the Lucas Sport Coil. But it
>is set up for an unballasted system. You
>will have to bypass the resistive wire that >feeds the original coil.
The B does not
>use an external ballast resistor, it has a
>resistive wire built into the wiring
>harness. If you do not bypass this wire
>the Sport Coil will only be getting about
>half the voltage that it needs. You will
>get a spark, but only about as strong as
>that of the original coil.
And you won't fry the coil, like you would a normal coil without the
ballast resistor? Why not?
-NORY
Don't assume that because you have found one problem, you have found the
ONLY problem.
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