If you set the EBC to "OFF" that doesn't mean it shuts off engine braking, it means that it shuts off the engine brake CONTROL (which reduces engine braking). It's very confusing, I wish they would have came up with a different name for it. They should have called it "Corner Entry Speed Enhancer"! You will always have engine braking no matter what level you set the EBC to, it's just a matter of how much engine braking. With the EBC set to "OFF" you have no override control on the engine braking, which means you have all of the natural engine braking that is inherent with this engine, which is quite a bit of engine braking. Level 1 reduces this a little bit. Level 2 reduces it a little more. And Level 3 reduces it to the lowest level the system is capable of, but there's still engine braking present. It's most noticeable at higher RPM's, if you're putting around at 3000 rpm you will likely not notice any difference betweent the 4 different settings. At 9000 rpm on the track it's definitely noticeable.