Ron, This is long, but it takes a lot to explain it.
In theory the colder the air the denser, therefore more oxygen molecules
can be packed into the combustion chamber at a time. Then as with
carburetored engines the leaner the mixture. If it gets cold enough then you
are running lean. FI + computer helps compensate for this situation but not
enough. In the case of nitrous> it actually does 2 things, it super cools the
intake air down stream of its injection point thus making a real dense air
mixture + nitrous also breaks down into O2 upon combustion to add oxygen to
the fuel mixture. That is why extra fuel has also got to be added to the
stream at the same time or the lean mixture combustion temperature will
excede the limits of the material for the pistons and literally vaporize them.
Being an old steam engine addict I know that the higher the temp of steam
the more pressure you acquire. So, in theory temperature of the combustion
chamber would effect the amount of expansion of the gasses. Up to the point
that the humidity in the air starts cooling the temp. of the detonation would
be the optimum. What ever the hell that would be. I have heard around 30 to
50%.
SEMIHEMI01 (Bill C.) 2001 QC, 4.7L, 5spd. 3.55 LSD, K-N Cool-Air
<A HREF="http://hometown.aol.com/semihemi01/">"THE DAK"</A>
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