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Old 12-03-2007, 07:31 PM   #1
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Default BRAKING IN A MOTOR... HELP

HEY GUYS, I JUST GOT A SH MOTOR FOR MY 10TH SCALE AND I NEED SOME TIPS ON HOW TO BRAKE IT IN.
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Old 12-03-2007, 09:34 PM   #2
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is it a high end sh? or a budget version?

i'll put it on a bench..that's if you have it... if not, then idle 3 tanks and tune it to run as per normal as the fit of the sh is pretty loose...
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Old 12-03-2007, 09:39 PM   #3
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this should help...

1. The first step is to wrap the engines cooling head up in aluminum foil. this will help it achieve optimal tempature fast and help insure the engine is not running too cool. It will also force you to run a richer needle setting to keep the engine in the temperature range. We also reccomend using a heat gun of hair dryer to get the engines temperature up above 160 degrees before trying to turn over the engine. Allow the engine to cool and remember to place the engine at bottom dead center
2. For the first 2 tanks of fuel you should only let the engine idle (do not rev at all.) make sure the engine is around 210-240 degrees monitor it closely and use the needle valve to control temperature.
3. For the third tank of fuel you should repeat the steps and pulse the throttle to 25%, remember do not hold it open just slow open then close no more than 25%. If you have a computer radio you can use the servo endpoints to accomplish this and it will make it much easier for you.
4. For the fourth tank of fuel repeat step three but this time you can open the engine up to 50%. You should no longer need the alumn. foil wrapped around the cooling head and remember to keep a close watch on temperature, at 50% throttle it will be very easy to over heat the engine. Remember to control the temperature with your needle valves.
5. Tank five is a repeat of step four but this time open the throttle up 75%. Remember that you want to pulse the throttle and should never have the throttle open for longer than 1 second.
6. Tank six repeat step five but this time open the throttle up 100%. Remember that you want to pulse the throttle and should never have the throttle open for longer than 1 second. At this stage it is extremely important to watch temperatures as the engine can over heat very quickly and unexpectedly. In order to maintain temperature at this stage the engine should be running extremely rich.
7. Now your ready to take the car out and tune for performance your engine should be ready to go. Don't overdue it too much for the next 2 tanks but you should be able to drive around the track at a good speed but not race speed.
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Old 12-03-2007, 09:52 PM   #4
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+1 for Jason.
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Old 12-03-2007, 11:30 PM   #5
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Here is another method...

http://www.rbmods.net/enginetempering.php
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Old 12-04-2007, 08:04 AM   #6
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We don't use aluminum foil... just shop towels. The object is to get the heat up to the proper level. Also, if it is hard to start, (like my Werks which had a pretty tight pinch) pre-heating it with a heat gun helps, and it is easier on your starter box.
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