I've got a 2008 6.7 manual trans tune going with a full delete. Runs pretty strong, the boost is doesn't climb as fast as I want it to. The most boost I've seen is about 34psi on the scanner, mechanical gauge is about 30psi. The main thing that bothers me the most is the idle, I can't get it below 800rpm. I've set everything in the tune for 650rpm but nothing works...??.