Why did the thread have to end? I was enjoying learning about what I can do to these engines. How would you go about lowering the compression? Do they make pistons that aren't as high? Don't forget you've got a pretty weak engine for the weight. Lowering the compression will also reduce responsiveness but then again turbo spool won't be as bad as on gas engines since it should spool faster. Also I intend to put 3.55s in my truck to see what it can do. Guys at work always joke about how these trucks couldn't do 70mph new.