I've dont have much experience on sand, but just regular hare scramble races that I have been doing, I find the 13t a lot better, however flat out straight dragging I'd have to say my 14t is better. I have to agree with xx700xx on this one. And for racing fuel, IMO it doesn't do much for you. When I had my chevelle I tried all different things, and I was running 105 and 93, and was getting the same results. The only difference I found in my crotch rocket with the fuel, was the exhaust smelled prettier. I dont know what others think, but I think you'd be spending too much for gas when you dont need to. But as I said, it is my opinion. But I would def run the 14t, unless the drag is only 20 yards, lol.
2008 700xx; Power Bomb header with power core 4 exhaust, Power Programmer III, pro armor nerfs, prm products control front and rear bumpers and full skid, 10" ITP rears, ITP Baja's fronts, RZR 2's all the way around, Uni filter, 13t sprocket, CCP steering Damper, DS450 shock swap, Dual Gasser Throttle, bar risers and Moose barkBusters. 730XX kit plus other engine mods!