Bob:
I installed the Pertronix in my '71 and the idle came out smoother. The
Pertronix caused a huge initial shift in the timing, but after adjustment
all was fine. I set the timing to the same spec. Did you remember to
disconnect the vacuum when setting the timing?
I am also happy with the Pertronix in my TD. The points in the TD were
always fouling with oil. The Pertronix is unaffected by oil. I don't see any
reason to rebuild the distributor now, as long as the centrifugal advance is
still working.
Bob Donahue (Still stuck in the '50s)
Email - bobmgtd@insightbb.com
52 MGTD - NEMGTR #11470
71 MGB - NAMGBR #7-3336
.
----- Original Message -----
From: "Bob Howard" <mgbob@juno.com>
To: <paul.hunt1@blueyonder.co.uk>
Cc: <mgs@autox.team.net>
Sent: Monday, October 14, 2002 1:52 PM
Subject: Re: Pertronix questions
> Paul,
> Thanks for your reply. Yes, it was steady with the points. They worked
> fine, but the distributor shaft bearing has some wear and the Pertronix
> is said to overcome a bit of shaft wobble.
> The Pertronix has just two wires. It mounts on a new plate that
> replaces the plate on which points and condensor mount. The two wires
> pass through a new rubber grommet, then the red goes to 12 source and
> black to the coil negative connector. The connections are all tight and
> appear to be in good order. .
> Bob
>
>
> On Mon, 14 Oct 2002 16:13:37 +0100 "Telewest \(PH\)"
> <paul.hunt1@blueyonder.co.uk> writes:
> > A fluctuating tach needle indicates that the pulsing of current
> > through the
> > coil is not consistent, hence the fluctuating idle. Was it OK with
> > points?
> > If so go back and if it is still OK there is a problem with the
> > Pertronix or
> > its installation.
> >
> > ----- Original Message -----
> > From: "Bob Howard" <mgbob@juno.com>
> > To: <mgs@autox.team.net>
> > Sent: Monday, October 14, 2002 3:49 PM
> > Subject: Pertronix questions
> >
> >
> > > This weekend I installed a Pertronix in the 25D distributor of
> > my
> > > 72MGB-GT. It was easy to do, but now I understand why there are
> > so many
> > > questions about installation from listers--the instructions are
> > quite
> > > clear and informative, and leave out only one significant piece of
> > > information.
> > > But to my questions---1) since installation, with timing set
> > per the
> > > manual, 16 degrees BTDC @ 1500 rpm, the engine won't idle. It just
> > > stalls. It runs OK, given enough throttle, but why should it
> > now not
> > > want to run at the idle setting at which it was quite happy
> > before?
> > > 2) now the tach needle swings, about 200 rpm +/- at 2500 rpm,
> > 300 rpm
> > > +/- at 3000 rpm.
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