You seem to think that, comparing cubic inch to cubic inch, a Briggs Stratton lawn mower and a nitro burning fuel dragster would be equal; I just don't think so.
I had a dual plug Nissan pickup a few years ago so I know they are around; for that matter, all airplane engines are dual plug and a check valve shouldn't be too much of a problem. If you get a math whiz to figure it out, how do you know it's right; sounds like a lot more fun to actually do it than to get someone else to figure it out.
you have to realize that in addition to the firing pulses 17 times a second you have 17 vacuum phases as well. You would have to use a check valve in the gauge like a compression testing gauge to eliminate the effect of the vacuum I don't know where you would get a dual spark plug engine. You still haven't said at what point in the power curve you are trying to measure. Like I said anyone who has studied thermodynamics can figure this stuff out without ever running the engine. You must know someone who has studied thermodynamics, or go to a college many professors would be happy to show off their knowledge. It is beyond my education, but lots of people can figure it out it is fairly straightforward physics. It is the same math they use to design engines, maybe call the design dept at general motors, they could probably use some positive PR about now.
