When my 05 was stock it was easy to find the limit,with a little suspension and wider tires it is night and day. This thing strait rails for a solid axle car.
Mine started pinging, and popping going through 3rd under heavy or full throttle. It did this out of no where. I have since returned to the stock tune and its now fine. I think we are getting screwed at the pumps more way than one. I"m gonna try race gas because it always ran good on that along...
I know a guy that pulled a 13.0 in a stock mach,thats never been done in a 05/06,and people have gone faster than that in the machs stock. Just look at the trap speeds,machs trap 103-106 stock,05's trap 101-103,slight edge but a edge none the less.