So I have a 2014 with 6.2L. I just dyno'd it yesterday and hit 246 RWHP. Tech said it looked like there was detonating (pinging) going on. This is all stock and was looking for at least 300 RWHP. Going to add a K&N CAI but wanted to see what it was doing before I did. Need help identifying what is going on. I am running 91 octane. Brand of gas? But just the gas is not going to give me a 50 HP drop. My truck needs help. Only has 22k on milage and still runs great.