I didn't disappear, I just have nothing else to add at this time. It seems many involved have it all figured out. I was trying to distill it down so I could and maybe help others gain a deeper understanding of what makes some cylinder heads work so much better than just flow numbers would indicate on their own. I'm not just talking WOT/dragstrip style performance here alone but an all around great performing engine with manners that could be described as mundane--until you experience it. Anyways, this thread can fizzle out it was good while it lasted. J.Rob
