Ray,
That's good advice you gave Andy. TD's are static-timed, and they have
only one notch on the pulley, at TDC. He will need to measure diameter
of the pulley, calculate circumference, then work out the distance in
inches that represents 32 degrees. I did this some time ago as a check
on my distributor's advance. I worked it out, then cut a strip of plastic
from the curved side of a margerine tub to that length, so that I could
then put a spot of paint on the pulley. Sorry, I forget the
measurements. And, since there are at least three distributors used in
TDs, he will need to use appropriate measurements for his car.
Bob
On Fri, 23 Jun 2000 22:13:15 -0500 "Ray McCrary" <spook01@home.com>
writes:
> Why not just adjust the timing so that total crank degrees of timing
> is
> achieved, and let the idle timing take care of itself?
> By this I mean that you know that it takes a total of, say, 32
> degrees total
> (crank) advance at 3000 rpm to achieve maximum performance. You set
> the
> distributor to give 32 degrees at 3000 rpm, and let the timing at
> idle fall
> where it will.
> BTW, the 32 degrees is just an arbitrary figure that I have used on
> other
> engines; you will have to determine total advance on the MG
> distributor from
> a Lucas manual or other info source.
> Best,
> Ray McCrary
> "Speed is Life;
> of course Luck and Altitude
> are helpful, too."
> ----- Original Message -----
> From: "Andrew Moyce" <amoyce@pol.net>
> To: <mg-t@autox.team.net>
> Sent: Friday, June 23, 2000 7:19 PM
> Subject: Re: Timing the Pertronix ignition
>
>
> > I'm still having some minor timing problems with the Pertronix. I
> > haven't been able to static time, using either light off or light
> on
> > as an end point, so have to resort to timing light. The problem,
> > I've been told, is that above 6 or 700 rpm the spring weights come
> > into play, so the setting will be a little retarded.
> > I currently have it set (idling at about 800) at a few minutes
> > before 11 o'clock . . . assuming TDC is 12 o'clock. Runs okay, but
> > I'm getting gear lever rattle on acceleration. The rattle wasn't
> > there when I had the timing set closer to 11:15 or 11:30. Should I
> > go back there?
> >
> > Andy Moyce
> > 52 TD
> >
>
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