Just loaded the 275 tune a few days after installing intake, tuner exhaust. Did a few WOT runs just checking it out and what not. Drove to my " test area " and did the tranny break in procedures to the TEE. After the last 3/4 throttle pass I believe I Started smelling something burning and popped the hood and there was my 1st puke. I had the coolant level about 1" below the bottom fill line. Was hoping to stay running this tune but I guess I will be loading the 250 back soon. I have backpressure monitoring with the dash dq. I have the audible alarm to go off at 75 gph and it never has gone off. Its highest is right around 70 that I have seen.