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Farmall & IHC Tractors Discussion Board

Re: (Jim) Firing Voltage versus Compression


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Posted by greyfoxxca on December 13, 2010 at 16:24:52 from (137.186.159.24):

In Reply to: Re: (Jim) Firing Voltage versus Compression posted by JMOR on December 13, 2010 at 09:57:18:

Hi JMOR

I do not understand what your graphs are illustrating.

I understand the vacuum and one atmosphere(14.6abs) , but is the 150,000 feet means altitude or pressure?

If it illustrates altitude then the air pressure is lower than 14.6 pisa(lbs sq inch absolute).The same with 300,000 feet.

IMHO

Not sure why anyone would use feet as a pressure measurement. We would then would have to know feet of what ,water or what? Never heard of feet of air pressure.

anyway guys I do not understand why a extremely hot reactive mixture(gas air) would have high resistance to a spark. I do believe that a high compression engine will have extremely high squish or gas swirling past the plug tending to blow the arc out. The faster the engine turns over the more turbulence will be around the plug.

As I surf the web many site do mention high compression in engines cause more voltage needed , but looking at the physics I do not see it.

High pressure molecules may have a short electron travel but it would be extremely hot and close to others causing a electron flow quickly.


George


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