If you want flat out stupid speed, try a world models 46 sized mustang with a ys110 in it. that will get you 135-140mph and they will not self destruct unless you have a mid-air:

http://www.nanoplanes.net/warbirds-midair-collision.wmv

all the planes here are 46 sized warbirds doing 135-140mph.

i had a world models 60 size mustang and it did about 125 with a ys140. i doubt the TT rare bear will do much more than 125 with a 120ax in it. with an os160, maybe 130.