madmax22
Posts: 3378
Joined: 9/7/2007
From: Greentown,
PA, USA
Status: offline
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Ok guys this question is popping up EVERY where. No offense to any one new to the hobby! But here is a couple ways to break an engine in!
First ill start by my way! ok first tank you can let idle with short blips of the throttle to keep it running. second tank get it on the ROAD (not on grass of dirt) and do 1/4 throttle passes. do the same thing for tank 3 but get a couple 1/2 throttle blips in there. 4th tank do some 1/2 throttle passes with some full throttle blips. 5th tank do 3/4 throttle with 1-2 seconds of WOT (wide open throttle) for the 6th thru 10th tanks you can do some WOT a little but not to much as the engine is still new. Always let the engine cool down before tanks with break in. Also after break in tanks get the engine at BDC (bottom dead center put it BDC every time you stop running)... Make sure with every tank your temps get up to at least 200 F...
Heat cycle: STEP 1: By using aluminum foil, heat tape or header wrap for full-size cars to block off cooling fins on the heat sink, you can somewhat manipulate the engines temperature so the engine can reach optimum temperature faster. Of course, thats only if its not warm enough outside to allow the engine to build heat quickly enough.
STEP 2: While the engine is idling and warming up, leave the glow driver attached to the glow plug. This reduces the chance the engine might flame out early. Avoid revving the engine wide open to warm it up faster: that will actually wear out the piston and sleeve more quickly. You might see some of the guys at the local track doing it but believe me; this does more harm than good. You can give it some short moments of 1/4 throttle to help build engine temp and to keep the engine running while on the starter box.
STEP 3: While the engine cools between break-in runs, always, I mean ALWAYS make sure the piston is bottom dead center (BDC) when the engine is cooling.
STEP 4: After this first 15-minute break- in period, you should then run the engine in three 5-minute intervals. Again, make sure to let your engine cool down sufficiently between runs. Run at no more than half throttle with some short full-throttle burst. Again, make sure the engine gets up to temp and the piston is BDC (bottom dead center) each time when cooling. When the break-in process I described is finished, you will have a total of 30 minutes run time and break-in on the engine.
CONCLUSION!!!: Well, thats all there is to it: Your engine is now properly broken-in. As you start tuning for racing, just remember that running rich is better, but the engine must get up to temp. Take your time when breaking-in your engine. Dont rush the break-in process. If you rush it, you will only be rushing to the hobby shop to buy a new engine. The better you treat your engine during break-in, the better your engine will treat you. REMEMBER BDC after every time you use the engine!!!!
Hope i helped a little!!!!!
please dont hesitate to tell of any other ways or to make correction  Thanks!
< Message edited by madmax22 -- 7/9/2008 3:56:07 PM >
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All Forums >> RC Cars, Buggies, Trucks, Tanks and more >> RC Truggy >> HOW TO BREAK AN ENGINE IN!!!!!! 
HOW TO BREAK AN ENGINE IN!!!!!! - 
