22x14 isnt exactly all that large of a track space, but for something this size
http://www.raidentech.com/mircunstmiar.html even the hottest of motors and gearing the space allotted would be pretty fun, the micro 1/24th size would probably fit that area pretty nicely as well depending on how extravagant the track gets
http://www.losi.com/Products/Default...rodID=LOSB0243 also check out the 1/36th scale just a tad bit bigger then the first link but a whole lot more expensive
http://www.losi.com/Products/Feature...rodId=LOSB0230