There may be something to the dist setting on my combo. I have the adv coming in very early. I also have alot of overlap but I need it to bleed off some of the pressure. The cams in the 113 and higher range do tend to be much smoother(smooth idle wasn't my aim). Also I only have about 9-10lbs of vac so yes that is something to consider as well. The long and short is there are much better choices of cams than the one I run but I like the way it sounds and like the way it runs so I'll keep it. http://www.youtube.com/watch?v=gas0I47We...lf=mfu_in_order