not sure about the reach... but using fast shutter speed (1/80 at least for 80mm, 1/400 at least for 400mm to avoid handshakes), u can freeze those racing cars. ideally your camera fps should be fast enough... as most probably u need to do burst shoots then get some good shots from there.
The focusing speed is quite slow even on my D700 & I sold it without ever using. But you should get yourself to the corners to find the best angles & cars slow down over there. 200-400mm should be enough & yes, panning!
Nearest lodgings should be @ the airports either the international or LCCT. It usually takes me about 30mins from Kl city to Sepang track if you use the Putra highway to cut across.
Nearest lodgings should be @ the airports either the international or LCCT. It usually takes me about 30mins from Kl city to Sepang track if you use the Putra highway to cut across.