Originally posted by Stazi:
So you have a "CAI" and you use 87 Octane. If that isn't oxymoronic, then I don't know what is.
Deteonation is the uncontrolled, explosive, combustion of fuel/air in the combustion chamber (normally the charge should burn across the chamber like a wave, not a BANG!). It's basically destroys the combustion chamber internals by disrupting the cool boundary layer normally found around the charge, and thus superheats the head, valves, and pistons accompanied with percussive force which damages the wristpins, conrods and bottom end bearings = BAD!
Pinging/detonation sounds like rattling marbles in a can, and the knock sensor "listens" for this and pulls timing if it hears it (but it can only retard the timing so much) to try and diminish the detonation from occuring. When the ECU does this, you make less power.
Thus putting on a power adding modification (CAI) on, then using piss-water for gas in a car that has high compression (why it needs high octane fuel) is stupid.
Reminds me of the silly dopes who tried to dyno their modified SVT's with 87 octane and then were baffled why there car made even less power than a stock car! 
Soooo.... What you're saying is.... 
Mark
2000 Black CSVT
3.0L Hybrid - 206fwhp & 195fwtq
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