I run in my PR engines the same way as I do with my other engines.
5 to 8 tanks on the Starterbox at Idle
After that you can start running it at the track rich and slowly leaning the engine as the more tanks you run. It should be quite ok after 1/3 Gallon of fuel. But keep running in it by slowly tuning it to race pace. On my 1st PR engine, I used the Taiping Race to run in the engine. After all my heats and long finals.....the engine is so damn sweet now. Look out for it this coming MNL.
