a mini t has been clocked at 45+mph with a mamba
tbh your not gonna need that kind of speed, my rc18t with a X300 will push 25mph i know this as have raced 1.1 at this speed.
in 2003 RCX had a micro hpi rs4 hit 41.9 mph with a radar gun
this was using a
team orion big block motor
a zero extreme esc
two 5cell 1000mah brick packs running at 12v
an a small reciever power pack
hth with basic speed differences
TC