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Originally Posted by sperry
Detonation isn't caused by pressure, pressure is caused by detonation.
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Detonation is caused by the air fuel mixture spontaneously combusting due to temperature, pressure, and possible one or more ignition sources such as hot valve or other metal edge, hot exhaust particles still in the chamber, etc. But the ignition source is not required. That is how a diesel works without spark plugs. Continuious detonation.
And you can post all the pictures of burned buses you want, Oxygen is not combustable. Put a spark plug in a container of pure oxygen, and generate a spark, and nothing will happen. No explosion, no flame other than the spark itself. Same thing happens with a fuel. a container of pure hydrogen will not burn either.
Fuels combust in the presence of an oxidizer, and will not do so without them with very few exceptions. The only one I can think of off the top of my head is hydrazine which is really nasty stuff and is basically an extrmely unstable compound that is more or less self oxidizing. But from a chemical perspective, the majority of the energy comes from the breaking of the chemical bonds in the fuel, not the oxidizer.
So back to the original question. If your K&N filter has magically moved you from about 14:1 air fuel ratio to closer to 13:1 by causing the MAS to send an inacurate reading, then yes, you are making more power as long as you are not detonating, and the ECU is pulling timing to compensate.
Are you in jeopardy of hurting your car? Yes. To what degree, I don't know.