Stock Manual 99-04 4.6 GT is 215... with a good tune 225-230 stock, with CAI upper 230's, with heads 270-280's, with heads and cams 290-300's. All are in RWHP, not at the crank. Add about 15% for crank HP. This all depends on how good your tune is. Have seen some great tunes and some really bad ones. Perhaps your buddy just sucks at tuning and is making the performance tune worse than stock????
Here is a tip: Go to a good tuner that has lots of experience!!!!
Mods here, mods there... and more parts coming. Proud owner of a hole in the driveway in which money is thrown.