5000 miles of hundreds of high boost runs on the road before the rod bearing went. I didnt' tune my ecu, JWT did. I observed and logged all the values for a/f , timing, mass voltage, egt temps. I don't have a Devin chip. I bought my JWT ecu back in 1995 before you came into the Z scene. You probably was still in high school . Yea, you have a lot of tuning experience with the Z, Kudos to you. Why do you have to feel insulted ?