[Christ]

The PPM counts don't tell you much about volume or mass unless you have something to compare it to... namely the number of millions of parts coming out of the exhaust.

If you're running out 100ppm of HC, and you're pushing 1 billion particles per minute total, you're still pushing out 100,000 parts HC every minute.

I haven't done any math there, but the concept remains the same regardless of the numbers. Without context, the PPM counts are meaningless when determining mass of each exhaust component.


I suppose I should qualify that statement at this point by saying that I find it highly unlikely that there is enough unburnt fuel matter in the exhaust stream to actually do what people have claimed here.