[Healeys] Plugs

[Bob Spidell]

Josef, you're nothing if not consistent.


On 3/19/2023 7:25 AM, josef-eckert--- via Healeys wrote:
>
> I do not care what kind of noices arein 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> 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> *On Behalf Of *Bob
>     Spidell
>     *Sent:* March 18, 2023 2:17 PM
>     *To:* 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 thatwas
>             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
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://autox.team.net/pipermail/healeys/attachments/20230319/9c1cbc8f/attachment.htm>