Coming from the Nitro Truck background when I broke in my ABC/ABN engine for my Superstar I used a modified version break-in detailed in RC Nitro mag for cars. What it came down to was 3 (1 min) runs full throttle while tracking the temp. The I moved to 3 (2 min) runs in the same manner. Then I went to 3 min runs until I had roughly 40 mins of time on the engine. The whole time keeping the engine betwen 210 to 230 degrees and allowing the engine to cool between each run.

I followed this procedure for a OS .12CV-R for my truck and for my .40LA and both engines now scream and are very relaible and easy to tune.