yea, they are fast when you put money into them, there is no real way to make power with them w/o tearing down the motor and porting and doing forced induction. built rotary, like a bike can turn over 12-14,000 rpms. You can have a reliable streetable built rotary and put out 4-500 h, people who build them can get anywhere from 700-1,000hp out of a 1.3liter engine. this should give you an idea, this guys cars run 1/4's in 7.3's at over 180mph and still retains original shell/shape, just a wheelie bar and a parachute
http://videos.streetfire.net/video/p...ntis_76113.htm