[emaxxnitro]

if you have no limit on power system $
good motor http://www.castlecreations.com/produ...1515-3_5d.html
good esc
http://mgm-compro.com/index.php?tid=...-boat-z-series
good lipos http://www.rc-monster.com/proddetail...3150sp255s4500
high gearing