I trapped 114 in my cam only cc503 M6 car. I would say 115-116 is possible with the gm847 on a good day.

 

I really don't think the gm847 is gonna run down the track any better than the cc503 IMO

 

Yes my car is pretty light, and Im not arguing that these big cams are better, in fact the only thing that helps the car is its weight. Im sure if it was as heavy as my old T/A (3600lbs) it wouldn't run for ****. The custom grind I had drove way better and had more usable power all around; it also was way smaller than the cc306 duration wise.