I run a 17.5 with 0 timing, and a hobbywing esc, with timing on normal, with tamiya rubber and rims, and i run 48P 70t spur with 18t pinion. My motor does bugger all work as it comes off after a race and it's not even hotter than room temp, same as my esc. My car isn't the fastest on the track but it's a good speed for me and my useless driving skills... oh i run 25c stick pack lipo also.
There's a starting point for you at least.