Greg, they don't have three sparks. The spark just jumps to the closest electrode only eroding one electrode at a time. Therefore the plugs last three times as long.
Phill
Phill
> greg esposito <gregespo73@yahoo.com> wrote:
>
> Les has hit on the reason, I believe, these plugs will give a more crisp
> acceleration. The flame front is starting in the right spot as vw
> designed with the plug location but importantly the spark has an open
> path outward toward the cyl and piston top. Combine this with the
> possibility of up to 3 sparks happening at once (three/broader flame
> front)����and you have a real benefit. In the old days we used to "index"
> spark plugs. This was the practise of ensuring the side electrode did
> not shroud the flame front. You would use various methods to get the
> side electrode to stop when it was closest to the wall of the cylinder.
> The other and biggest advantage to these plugs is they don't have poor
> spark events at low rpm like the standard plugs do. Hence the idle
> becomes a lot smoother.����Oh and if we are getting into talk about the
> development of the piston engine look out for some very high compression
> normally aspirated engines in a showroom near you. One of
> the reasons designers are being able to bring these engines to the
> market place is the work already done on flame propagation and quench
> dynamics.����Greg E
>
>
>
> ________________________________
> From: Les Harris <leslieharris@optusnet.com.au>
> To: Syncro_T3_Australia@yahoogroups.com
> Sent: Monday, 8 October 2012 10:37 PM
> Subject: RE: [Syncro_T3_Australia] Re: Wbx spark plugs
>
> ����
>
> Eddie,
> Flame propagation is the path taken by
> the flame as it spreads through the cylinder head until all or nearly
> all of
> the gas is ignited.���� We tend to think of this as being instantaneous,
> why
> it is, but it is not an even spread.���� Or, to be more correct, it
> wasn��������t
> until the search for better fuel consumption started in earnest.
> It is this development that has produced
> ever improving fuel consumption figures for the same power output in
> modern
> engines.���� In a lot of cases, it is reduced fuel consumption and
> increased power.
> This is all down to the flame
> propagation.���� Until quite recent times, an amazing amount of fuel was
> not
> ignited and exited the engine through the exhaust valve!!���� Some engines
> were so poor in this regard that unburnt fuel could be measured at the
> tailpipe!!
> Les
> ����
>
> ________________________________
>
> From:Syncro_T3_Australia@yahoogroups.com
> [mailto:Syncro_T3_Australia@yahoogroups.com] On Behalf Of eddie
> Sent: 08 October 2012 22:21
> To: Syncro_T3_Australia@yahoogroups.com
> Subject: [Syncro_T3_Australia] Re:
> Wbx spark plugs����
> Flame propagation you say Les. Might have to read up
> on that one. Eddie.
>
>
>
> ����
