All of my RB's seem to run around 260-300 degrees after break-in(on extreme racing conditions they have been in the 310's to 320's). They usually wake up around the 3 turn from closed mark, just remember that temps are a reference point and like a fingerprint, no two engines will run at the same temp when tuned at peak performance, go easy on the RB's needle settings untill you reach the 1 gallon mark, after the gallon you should notice the engine waking up big time.