What upgrades are there to make a RC engine go faster?

Electric powered, there isn't much, but if you have a gas powered one, there are a lot of things including better fuel, a lighter body or a whole new engine. Here are more opinions and answers from other FAQ Farmers: * Use the upper limit of the ignition plug as the engine spec can use. Adjust the carburetor to it's leanest setting without stalling the car or breaking the connecting rod. Best way to do this is with an infra-red heat reader. Take note of engine temperature after every run,and adjust the carbs to lean side one increment at a time. Of course you have to consider the outside air temperature and humidity. Remember in racing the saying is, "To finish first, first you must finish." good luck.. == Many years ago, I met a man who worked on gas engines by re-boring the cylinders just like you do with a hot rod car. I don't know what is involved with this or there is anyone that does this for a fee. Something you could check into. ANSWER you actually can add a nitous oxcide system to nitro engines now.