Other Plasma Spark Ignition

[LeftysRule22]

Anyone know anything about this? I was adjusting the valve lash on my car, forgot the intake and exhaust gap so I went to look it up and long story short I ended up at this video:

http://www.youtube.com/watch?v=gYCr4p5QDEA&feature=related

Another comparison:
http://www.youtube.com/watch?v=fhj3BywrbOo&feature=related

I thought this might be a particularly cool thing for ski's especially because of the effect of water on the spark. I know it's a bit far-fetched in application (2 vs 4 stroke, alternator vs magneto, etc..) but it should be possible, right? Or is this essentially what a total loss does?

(Sorry if this is a repost)

 

[BRANDO6X]

I know this is an old post, but I am very interested if anyone in the forum has used this type of spark system before.

Judging by the lack of reply's, I am guessing no one has used this type of spark on a PWC engine... But maybe a car or bike?

Anyone?

 

[kevbo]

MSD is as close as we get.

 

[BRANDO6X]

Really? I am surprised people aren't running diff coils or otherwise experimenting with the spark energy. I think there can be some power and response to be had with better spark

 

[kevbo]

Really? I am surprised people aren't running diff coils or otherwise experimenting with the spark energy. I think there can be some power and response to be had with better spark

Some of our ignition makers are staggering multiple sparks trying to clean up part throttle four cycling.
It doesn't take much spark energy to ignite a "best power" mixture at moderate pressure. Another big problem for us is insulating a hot ignition in salt water.

 

[BRANDO6X]

Ya I can see some insulation problems coming up, but I think with some major gains could be seen if you get enough spark energy.
Multiple sparks can do the job, but the only reason you use multiple sparks, is because of the small spark duration of CDI's. In the end more energy into sparked into the charge should yield a faster flame front right?
Advanced timing is normally used to make sure there is time for the charge to burn completely, but in doing that you are working against stroke for degrees. I'm not sure what kind of advance skis normally run..

I think with enough spark energy you should be able to retard timing and still get a complete burn with less energy working against the compression stroke.
I have experimented a bit with some high energy spark, but only on small engines. I am building my first 701 right now and that's why I have been thinking about ignition options and posted on this thread

 

[kevbo]

It wouldnt be hard to install multiple spark plugs if you want to see if more spark is really better. Wide gaps and high energy is necessary for mixtures that are very rich or lean. Our engines run very rich at part throttle below the pipe. Hot ignitions improve this area the most.