ABC break-in in the car

Set the main needle according to the manufacturer's specifications (e.g., 2 to 3 turns counterclockwise from closed). Open the idle needle several turns so the engine shuts off when abruptly throttled back.
-Start the engine
-Advance the throttle to 1/2. Listen for 4-cycling. Lean the mixture to a rich two cycle operation.
-Run the car in a 100 foot diameter circle or figure 8. Keep the throttle at 1/2 and listen for 4-cycling. Don't let this happen! If it does, immediately lean the main fuel needle a little at a time until the engine produces a clean, steady 2-cycling sound. Run your car in a cicle/ figure 8 for about 1 minute. When the minute is up immediatly check the head temp.
Keep a log of run time, head temp, estimated rpm and your perfomance comments.
The goal is to keep the head temp. at above 200 degrees F. and less than approximately 230 degrees F. If the head temp. is less than 200 degrees F. lean the high speed needle slightly, and try again after the engine has completely cooled. When the engine stops, using the fly wheel turn the piston to BDC.
-Perform the 1 minute run at least three times while you adjust the head temp. by "tweaking" the needle valve as needed.
-Now run the car around for 2 minutes at least twice. Remember: 1/2 throttle and no four cycling. Same game : check head temp., allow it to cool, record data.
-Don't be tempted to open the throttle wide! The mixture settings will probably be all wrong for wide open throttle(WOT)(. There is plenty of time for that later.
-The rest of the 1/2 throttle break-in runs will be 3 minutes long. When they tottle 35 minutes(minimum), you have successfully heat-cycled your engine and break-in is properly complete. If you like you can run it another 10 minutes or so it won't hurt.
-Tune the engine for WOT and idle operation.
To read " Super Engine Tining" by Steve Pond go to ( rcnitro.com/artcles/index.asp )