{Chrysler 300} Pertronix advisory (again)

If using Pertronix, also remember that per instructions in every Pertronix box for the last five years, you MUST use resistor-core RFI-suppressed ignition cables (including coil wire) or else the Pertronix unit is prone to premature failure due to the high RFI produced during every spark. After direct conversation with a very patient and helpful Pertronix representative a few years ago, I clearly understood that the coil MUST be fed constant 12v; the ballast resistor was intended to reduce sparking and erosion of the points by enabling full 12v for the short duration needed by the starter; thereafter, the points were operating only as a switch and could easily function on the reduced voltage out of the ballast resistor while reducing spark-induced pitting/erosion of the points.

I custom-made black 7mm stainless steel spiral-wound ignition wires from scratch to maintain stock appearance when installing a Pertronix while restoring my late father's 1957 300C. Also used a high-voltage, low-resistance coil recommended by Pertronix to match their module, plus modern fine-wire Iridium NGK spark plugs; now have near-instant starting, sometimes less than one engine revolution!

No more trying to adjust persnickety dual points in the impossible location on the 392 Hemi with the distributor up against the firewall! No more incessant (often very creative and physically impossible!) cussing, back-and-forth testing with dwell meter and risk of scratching the fender, etc.!

**********************************************************************************

Among the problems with diagnosis of old car running problems is that a problem such as a rough idle can be caused by a multitude of causes. Chief among these is a vacuum leak and I would begin there.

I understand many have luck with Pertronix and similar substitutes for breaker points. These are in my opinion one size fits all solutions to problems that don't exist.

Properly installed and adjusted breaker points available at NAPA will last our average tenure with the car. Yes electronic ignition is far superior to that of breaker points. But that does not include some of the one-size-fits-all under the cap substitutes that offer poor heat rejection and often fail without notice on the Road.

If you insist on using pertronix make sure your mechanic realizes that in most cases the quail must have a ballast resistor in its primary circuit but the module itself must be fed directly from the battery or ignition switch and not through any ballast.

Danny Plotkin

Sent from my Verizon, Samsung Galaxy smartphone

-------- Original message --------

From: Harry Torgeson <torg66@xxxxxxxxx>

Date: 6/10/22 2:36 PM (GMT-05:00)

To: chrysler-300-club-international@xxxxxxxxxxxxxxxx

Subject: {Chrysler 300} 1964 300K Idle

I have a mechanic who has not been able get a smooth idle for me, I replaced the distributor with a pertronix 2 times, put back original distributor runs better, put in new Edelbrock carburetor, fixed intake manifold vacuum leak, also ammeter needle jumps when rough idle occurs, was worse with pertronix. Thanks in advance for any ideas on this issue.

Harry Torgeson

971-221-4699

--
For archives go to http://www.forwardlook.net/300-archive/search.htm#querylang
---
You received this message because you are subscribed to the Google Groups "Chrysler 300 Club International" group.
To unsubscribe from this group and stop receiving emails from it, send an email to chrysler-300-club-international+unsubscribe@xxxxxxxxxxxxxxxx.
To view this discussion on the web visit https://groups.google.com/d/msgid/chrysler-300-club-international/CAHChH_1Cs8J%2BzQqausXvgoCZPkJc8N69dwfwW2Z6Rq1P5uh_%2BQ%40mail.gmail.com.
--
For archives go to http://www.forwardlook.net/300-archive/search.htm#querylang
---
You received this message because you are subscribed to the Google Groups "Chrysler 300 Club International" group.
To unsubscribe from this group and stop receiving emails from it, send an email to chrysler-300-club-international+unsubscribe@xxxxxxxxxxxxxxxx.
To view this discussion on the web visit https://groups.google.com/d/msgid/chrysler-300-club-international/62a39a01.1c69fb81.b09c6.0771SMTPIN_ADDED_MISSING%40gmr-mx.google.com.