Originally posted by carguy19
Well then keep driving you car thinking it doesnt ping.
If you want proof, go to a shop with a dyno let them make a pull with your car stand inside where the car is about 15-20ft away so the nois isnt right in your ears. Listen close.... that sound that sounds like metal bb's being dropped in a coffee can or garbage can is detonation. I've been in 5-6 sti's besides my own, stock and modded they all detonate. Its such a big problem subaru issued an ECU reflash to cure it, but yours must be the only one that doesn't ping
All STi's do NOT have issues with detonation. 91 octane can make the STi ping, overboosting from the factory also appears to be related. Shiv theorized that it might be related to the way the timing advance is handled. He hasn't confirmed whether or not this changed in the new reflash. Search is your friend.