[TR] Pertronix

[Brad Kahler]

I'm not so sure I agree. I would think there is something else at play
generating the noise. First a little background.

63 TR4 with pertronix ignition, stock solid core spark plug wires, stock
coil and a Rostra cruise control system.

Car runs great, plenty of power and acceleration. After installing the
cruise control I had continual problems trying to get the cruise to stay
engaged. Worse, it would randomly turn itself on and activate the cruise
mode. Not something you want to experience, especially when heading into a
mountain curve! (Yes that happened to me) I tried everything to get the
cruise to work with no luck. By chance I happened to be experimenting with
a dash cam that had audio capabilities and the first time I downloaded the
video to my desktop computer the screeching ignition noise could be heard
coming out of the speakers.

Fast forward to the convention in Dobson. During the car show I bought a
set of TR6 noise suppression plug wires and installed them on the TR4. Went
for a test drive and the cruise worked flawlessly.

My take on all of this is a pertronix ignition is not affected by
a noisy ignition system, the pertronix by itself does not generate enough
noise to affect a solid state cruise control and a cruise control installed
in a car with a noisy ignition system could be deadly.

Brad


On Sat, Oct 11, 2014 at 9:21 PM, <terryrs at comcast.net> wrote:

> I have been--and continue to be--a big fan of electronic ignition for my
> TR3A.  No gradual degrading of points, no resetting or filing, and so on.
> Just had my boat distributor rebuilt by Advanced Distributers in MN (NFI
> and all that).  They did a great job on a Triumph dizzy too.
> As I was talking to Jeff there, he mentioned how his experience with
> Pertronix has led him to believe that the RFI interference of the magnetic
> fields of the wires affects the Pertronix and can cause a reduction in
> power.  One particular empiric test he ran was with a new rebuilt high end
> engine that found a 30 horsepower increase switching to points after
> several disappointing tests with Pertronix.
> I'm not inclined to disbelieve it, necessarily.  In the navy in the late
> 60's, I worked on WWII radios in very old sub hunt and seek prop planes.
> They had odd interferences like inter-electrode capacitance issues.
> So...opening it up to the List.  I'm way to removed from electronics these
> days to profess expertise.  Jeff thought people would say he's crazy.
> Thoughts?
>
> Terry Smith, '59 TR3A  TS 58667
> New Hampshire, where inter-snowflake capacitance is a very real issue come
> on to January....
>
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