Breaking In Nitro Cars
There appears to be endless suggestions to how to run in a Nitro car, any even more clips on You Tube with cars either billowing out clouds of blue smoke, or not billowing out anything at all. Neither of which is particularly good position for Nitro car to be in, although to be fair loads of smoke is better than no smoke at all.. So after learning the hard way, this is how I prefer to Run in a new nitro car -
Fuel is a vitally important part of running in a nitro car, make sure you get the right percentage of nitro, around 20% - 25% for 1/8th cars, 15% to 20% for 1/10th cars as a rule of thumb. It will say so in the instructions so READ THEM.
You can get cold, medium or hot glo plugs, all of which do as they say on the tin, and run cold, medium or hot. Cold is good for hot days, hot is good for cold days, I always use a medium, and our cars seem happy enough, and I'm not likely to be out playing cars if its too hot or too cold anyway.
Ok,so I guess you have a glow starter? If not then now is a good time to go and get one, as you won't be starting anything without it. You also need a 'T' wrench which tends to come with the car, the big end does the wheel nuts, and the smaller one will fit the glo plug.
So first of all turn on the TX and RX, and make sure you have batteries fitted in them, and that all the steering wheel steers and the throttle throttles... Also check that if you pull the throttle forward that the brakes go on and the wheels lock. Also check all the trims are set to neutral.
Fill up the fuel tank with your chosen nitro from the spout of your filler bottle, did you know that if you squeeze the bottle and dip the nozzle into your big bottle of nitro fuel it will suck it up? The number of people I see trying to pour it into the filler bottle...
Place a finger over the exhaust, if your car is a pull start then yank the cord a few times until you can't see any bubbles in the fuel line leading to the engine, if the car is new then you can start the car with the glo plug slightly loose to reduce the compression,and then once the car is firing tighten it up (DON'T FORGET or you can ruin your engine)
If you have any, place the car on either a suitable car stand that allows the car to be off the ground leaving the wheels free to rotate, or find some suitable bricks to acheive the same thing.
Place the glow starter over the glo plug securely and then pull the pull cord quickly upwards, being careful not to over pull it (most are about 18" long), and then letting the cord retract into the housing again, if the car doesn't start then check the above points, that the fuel has reached the engine, no air bubbles, and the glow starter is fully charged, and then try again, it may take a few tugs of the cord before the car starts. If the cord seems to jam then the engine is flooded, in which case undo the glo plug, turn the car upside down and allow any fuel in the engine to drip out before refitting the glo plug and trying again. Once the car has started remove the glo plug, and leave the car running.
Most new cars come with factory settings, this normally means incredible rich so that the new engine gets lots of lovely lubrication, with a high idle. For the first FOUR OR FIVE tanks of fuel, leave these settings alone!
Once the car is running, leave it until the fuel has run out, let the engine cool for 10 to 15 minutes, and then do exactly the same.
Third Time Lucky
On the third time you can actually place car on its wheels, and start to slowly drive it in do-nuts, or there and back, not exceeding about 1/4 throttle, until the fuel has run out.
On the fourth time you can actually get to about half throttle, avoiding any sudden accelerations, or heavy brakings, allow the car to coast to a stop.
Finally this is the FIRST time you can actually start to use full throttle, applying it slowly and for short periods of time, and slowly allowing it to run for longer periods at full throttle on each run, still avoiding any sudden accelerations.
If you're patient, you're run it at factory settings for another tank or three before starting to fiddle with the settings, remember you've just paid a lot of money for it, don't rush it, the better job you do running it in, the better and longer it will run before you need to do any maintenance!
If you're taking your time and running your engine in over a period of a fuel days, then after a few runs, remove the air filter and clean it. (I only use water and Fairy Liquid, and dry it on kitchen towel, and reapply air filter oil to the inside filter) Also it doesn't hurt to remove the glo plug and drip inside the engine 5 - 6 drops of after run, and gently pull the pull cord to distribute it all over the engine.