[Diy_efi] Link for greenfire spark plugs...

[David Dowell]

These plugs seem to be a poor man's way 
(read cheap and doesn't probably work) of 
 introducting something like a plasma ignition.  Plasma
ingnitions were experimented with starting about 20 years ago.
Smoky Yunick (sp) of Popular Mechanics did a lot of work 
on the plasma system, and they did work.   The idea was to 
start the fire in the combustion chamber in many places at the same time.
This was done with a dual ignition system.   High voltage is required
to ionize the plug gap and start the formation of a spark, but once
the spark is created, much lower voltages will keep the current flowing.
By  



----- Original Message ----- 
From: "Jared Ryan" <jryan at caminofx.org>
To: <diy_efi at diy-efi.org>
Sent: Wednesday, June 08, 2005 4:36 PM
Subject: Re: [Diy_efi] Link for greenfire spark plugs...


> I agree, but what about on a wet manifold, like a GM TBI?
> 
> I am about to convert an '84 Chevy El Camino with a 305 and QuadraJet 
> to TBI, and I am considering testing a spacer that is supposed to make 
> swirl, to put some objective numbers on it... 1/4-mile ETs, 60-foot 
> times, etc.  I'm an amateur but I'm a natural tinkerer, so I'm curious.
> 
> I agree that the swirl would have no effect (and I doubt there would be 
> any swirl by the time the air reaches the ports) on a multiport engine 
> but I wonder if it helps any on a TBI engine.  My guess is that it all 
> depends on the exact engine/manifold setup.
> 
> I've enjoyed following this discussion, and I agree the "science" 
> behind these spark plugs looks very shaky.  My understanding (limited 
> though it is) is that once you start the flame, it spreads, period.  
> The only engines I know of where there was a big problem lighting off 
> the mixture was old gasoline engines with very big bores, like used on 
> Seagrave and LaFrance fire trucks before they switched to Diesel.  I 
> have heard they had two spark plugs per cylinder simply because the 
> bores were so big, to ensure complete ignition.  Unfortunately I have 
> not gotten to see such an engine taken apart.
> 
> Going back into lurk mode, enjoying the discussions. :-)
> 
>   ---> Jared Ryan <---
> jryan at caminofx.org | http://www.caminofx.org
> Yahoo!: gerhardr2001 | ICQ: 8457412
> 
> On Jun 8, 2005, at 3:51 PM, Daniel R. Nicoson wrote:
> 
> > I put this device up there with the intake swirl plates (mount right 
> > after
> > the throttle body) that are supposed to induce a "vortex" to intake 
> > air on
> > an EFI engine.  "This results in more complete mixture distribution".  
> > Those
> > damn things ignore the fact that there is NO mixture to be distributed 
> > until
> > the intake port where the fuel injector is squirting fuel!
> 
> _______________________________________________
> Diy_efi mailing list
> Diy_efi at diy-efi.org
> http://lists.diy-efi.org/mailman/listinfo/diy_efi
>