It all depends on how fast are you trying to go. I would recomend starting off with basic mantnence to increase the preformance of a vehicle such as a fresh air filter and good spark plugs and wires. when seeking a major increase in preformance on a budjet i would have to recomend nitrous oxide which when used properly is also relatively safe for your engine. Used nitrous kits could be found on Craigslist for as little as $300
Either will make your car faster.
Older safer cars are the cheapest.
It depends on what you want to do with your RC car or boat. If you want to increase your engine power you can get a Nitrous upgrade and make your boat or car go faster. If you want to make your car or boat there are body modifications you can do and you can even add lights to make your car or boat look awesome.
You would apply force to the accelerator to make the car go faster.
make it less weight
The pedal in the car you push to go faster is the accelerator pedal.
To make a co2 car go faster, make the body streamlined. Keep the weight down and make sure that the axles are smooth.
The faster they make the car the more likely it is to win.
Faster, no. Smoother, yes.
In soviet russia you can
make it go faster
A turbo can make your car faster by increasing the amount of air that the engine can have inside the cylinders. A turbo alone will not make a car faster, you will need to adjust the amount of fuel that is injected into the engine as if you add too much air it will cause your engine to lean out and blow up.