He's got a radar gun now and they clocked it at 201mph.
Still more speed potential as that was only the second prop he's tried (apc 7.4x8). Motor and batteries were only warm.
9S1P Lipo powered... awesome...but $$$ for the whole elect setup. However, you don't have to spend any money on cleaning spray and paper towels
http://www.rcgroups.com/forums/showthread.php?t=481568