[Healeys] Plugs

[josef-eckert at t-online.de]

I do not care what kind of noices are in nearby vehicles.
 
 
 
-----Original-Nachricht-----
Betreff: Re: [Healeys] Plugs
Datum: 2023-03-19T15:15:37+0100
Von: "Michael Oritt" <michael.oritt at gmail.com>
An: "m.g.sharp at sympatico.ca" <m.g.sharp at sympatico.ca>
 
 
 
"I always thought the resistor plugs were to introduced to suppress 
interference with car radios, which I don’t have,"
-----------------------------------------------------
They also eliminate your ignition's noise in nearby vehicles.
 
Best--Michael Oritt
 

On Sun, Mar 19, 2023 at 8:11 AM m.g.sharp--- via Healeys <
healeys at autox.team.net <mailto:healeys at autox.team.net> > wrote:

  I do exactly what Bob does with my BT7 except I use a non-resistor plug –
  Champion N12YC and 0.028” gap.  I too use a Lucas Sports coil.  I always
  thought the resistor plugs were to introduced to supress interference
  with car radios, which I don’t have, but I am happy to be corrected on
  that.   I think plugs are unnecessarily changed too frequently.  I remove
  them once in a while (every few years) and clean and check the gaps.  I
  run them until they shows signs of deterioration.  I have never had a
  plug fail me in the Healey.

   

  Mirek

   

  From: Healeys <healeys-bounces at autox.team.net
  <mailto:healeys-bounces at autox.team.net> > On Behalf Of Bob Spidell
  Sent: March 18, 2023 2:17 PM
  To: healeys at autox.team.net <mailto:healeys at autox.team.net>
  Subject: Re: [Healeys] Plugs

   

  I've run over 150K miles on Champion plugs with nary an issue (and will
  continue to do so); RN12YC for the BJ8 and whatever the recommended is
  for a 100M (RN10C?). With Pertronix Ignitors in both, I run slightly over
  'book' value (0.025") at 0.028" and both run very well (I also run
  stranded copper wire secondaries, so the 'R' is important, plus the plug
  caps have a resistor in them as well). My one-time auto shop teacher
  father maintained whatever spark was sufficient to ignite the mixture was
  adequate--mixture and compression took it from there--but a larger gap
  induces a 'hotter' spark which may be beneficial with leaner mixtures and
  at higher engine RPM (but has less margin as the electrode erodes). A
  larger gap requires the coil to produce more secondary voltage to jump
  the gap; a sports coil may be required to produce a consistent spark. 12K
  miles on plugs is fine in my experience--as long as the engine is in good
  nick--and they can be cleaned and re-gapped at least once. Sandblasting
  is a no-no as it will pit the ceramic insulator and can cause issues.

  I came across a YouTube video by David Vizard where he claims E3 Diamond
  'Split Fire' plugs produced slightly better mileage; yep, E3 makes a plug
  for Big Healeys (6-cyl only, I think). I've heard rumors that counterfeit
  NGK plugs are in the market.



  On 3/18/2023 9:49 AM, Simon Lachlan via Healeys wrote:

      Here’s a can of worms that we haven’t delved into for a while….

      So, I’m trying to get all my ducks in a row for a short run abroad.
      Car is a MkII BT7 with a DW fast road cam, 3 HD6s, big bore 6 branch
      and 123Ignition plus a so-called Sports Coil.

       

         1. I was looking through my library of files on Healey topics and
            saw that we were all over the place on plug gaps…..all the way
            up to 0.035”. So what’s the opinion there??
         2. And which plug? Seemed to be mostly between NGK’s BP6ES &
            BP5ES. Was a hold-out for their B8EGV 5627  but that was
            dismissed fairly vigorously by Jeremy Welch as being way OTT
            for normal road use.
         3. And, I have 12,000 miles+++ as plug replacement mileage so long
            as they still look and perform OK. Any thoughts?

       

      Thanks, Simon

       

   

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