ORIGINAL: Riptide

So in other words the people who post about hearing a knock or a ping are not likely hearing what they think they are or there is something else wrong causing the problem other than lower octane gasoline in the system.

Because jaguarking11 is indicating that our ECU does in fact pull timing to prevent detonation.

The PCM can pull it out but a lot of times the knock sensors don't work or they actually add timing when there is already pinging. I have seen cars that pinged because the knock sensors kept adding timing and couldn't hear the ping.

ORIGINAL: jaguarking11

Our engines are close to 10:1 compression ratio and the timing is already substantially pulled from the factory. The knocking and pinging is not something you hear in our engines at idle, or even under normal driving. It will be apparent once you are climbing the rev range during spirited driving where the car suddenly stops pulling and bogs down due to the ecu pulling timing and making the engine run extremely rich. That is a safety feature. The simple point remains that the engine does not perform like it should especially in the summer where the temps are high.

Put it this way, my intake air temp during the summer is around ~140f with the stock box on. I cant wait to see how my bama tune works out in combination with my c&L. During heavy traffic where you sit for 5minutes and move 10feet I have measured the intake air temp at ~190F with my dash hawk. Lets just say a combination of NY traffic and low octane fuel results in a very suprided driver when he finaly clears the traffic and wants to hit it. However these conditions I encounter almost on a daily basis, and they really do not apply to highway use. If you are crusing on the highway allot then the fuel can be lower octane because the load on the engine is minimal.