Here's an interesting you tube video of a 1664 HP 4 rotor turbo rotary. Look how hot the exhaust manifold gets!! http://www.youtube.com/watch?v=0BGGBU2Lpyo -- David Moyer Plans#727 Houston, TX -- Homepage: http://www.flyrotary.com/ Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html