Motor Specs from
http://slotcarnews.blogspot.com.au/2007 ... -list.html
Carrera E-200, E-500 (FC-130) [21,081 RPM/12v] 26,000/14.8v, tested 18,058-20,6340 RPM/12v
at 14.8v the E200 is rated at 26000 rpm hence why the 30k motor wouldn't seem that much quicker.
cheers
DM