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How to begin for nitro gas car?

1. CHECKLIST BEFORE TURNING ON ENGINE

- Ensure all screws are securely tightened.
- Ensure all moving parts move without binding.
- Ensure the fuel lining is leak proof, with no cracks.
- Ensure the muffler and exhaust are damage-free.
- Ensure the radio control having the fresh batteries.
- Ensure servos and linkages move without binding.
- Ensure nobody is on your frequency at the same time.
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2. ENGINE STARTING
1.

Fill up the fuel tank.


2.

Switch on the transmitter, then receiver. Make sure the throttle level (carburetor) is on neural/idle position.


3.

Check the air flow:
a) Take off the air filter and adjust the air intake opening.
b) Ensure the air valve open at 1/3 level.
c) Attach the air filter.

4.

Adjust the needle valve. Needle valve controls the fuel entry into the engine. It was pre-adjusted by the manufacture and does not need to be adjusted when you first start the engine. However, if you changed the needle valve setting and want to set back to the original setting, you should:
a) Tighten the needle valve (clockwise) until resistance is felt.
b) Unscrew the needle valve (counterclockwise) between 2-3 turns until the best fuel/air combination is reached.

5.

Send fuel into engine:
a) Push the primer button until you can see the fuel through air valve.
b) After fuel has reached the carburetor, continue engine starting by pulling the pull- start 3-4 times to spread fuel through the engine.

6.

Attach the glow plug starter:
a) Ensure the glow starter is full charged.
b) Attach the glow plug starter. Make sure the fuel tank is tightened.

7.

Start the engine:
a) Start the engine by pulling pull-start handle in succession. DO NOT pull the handle very hard but pull it continously.
b) Engine starting is enhanced when raising the throttle trim on the radio control.

8.

Over choked:
a) If pulling the pull-start becomes heavy or stuck, STOP pulling. It usually happens when the engine is flooded due to over-priming.
b) Remove glow plug. Pull the recoil about 20 times to discharge fuel.
c) Re-attach the glow plug and start engine.
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3. STOP ENGINE

While in idling position, remove air filter and close off air intake opening. Or, block exhaust.
Note: use gloves to protect hands, as exhaust pipe is very hot.
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Which percentage of nitro should you run?

Everyone you seem to ask has a different opinion of what type of fuel to use. No fuel is ideal for every application or is it a fact that a higher percentage of nitro results in better all round performance. The correct percentage of nitro in a fuel and its effects on engine performance are rather complex issues due to the many variables as in climate, humidity and glow plugs used. To understand how nitro content affects engine performance, it helps to have a little basic understanding of nitro.

  • Nitromethane is a monopropellant which means it can burn in the absence of air.
  • Nitromethane contains nitrogen and oxygen, which provides more "fuel" for the combustion process.
  • The oxygen contained in nitromethane is released during the combustion process allowing richer needle settings that pack more fuel in the combustion chamber.
  • More fuel plus more air potentially equals more horsepower when engines are designed to run on fuels containing nitromethane or the amount of nitromethane that you run.

There are a great deal more technical aspects to Nitromethane, but this explains why you can produce more power with it.

Now running more nitro does not always mean more horsepower, the engine has to be designed to run the amount of nitromethane you intend to use. Running 30% nitro fuel in an engine designed for low to no nitromethane content, will not yield anything but poor, hot running engine characteristics. Using 0% nitro fuel in an engine designed for 20% or higher nitro will yield equally poor running engine characteristics.

RC cars and trucks with engine sizes .12-->.18 usually use 10%-20% nitro content fuel with 8%-16% oil content. It is hard for one person to tell you which fuel to use for your particular vehicle due the varying conditions of your surrounding area. If you wish to find out what really works, go down to your local track to see what everyone uses, that's the easiest way. RC cars and trucks with engines from .21-->.27 typically use more nitro content. The common range is from 20%-40% and around 8%-18% oil content. Fuels have different oils, and at different altitudes their flash points are different, so some people say a particular fuel is good, but for someone else it is not. It is mostly trial and error for which fuel will run best for your liking.

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