[confused]

Don't worry about it, I don't know how many new ring jobs I have done to 911 engines, many many many, never had an issue the way I do it. Sometimes had to tune the motor for an hour before it could travel on its own power. Run the engine 20 min at 2000 + or - 200 won't matter. If you have new cams and rockers then turn the engine off after 20min and let it cool completely 4+ hours (work-hardens the metal surfaces). Then take the car out and load up the rings - up and down a gradual hill works best. Keep the rpms down for 500 miles (if you can), but really to get the rings to load up right you need some RPM, on a 73S I take it up to 5000 or 6000 and let it decel down. After 4 or 5 trips up and down the street getting as many GRADUAL runs up and down the rpm scale as you can then your rings should be fine. Drive the car around town for 500 miles, not on a long freeway trip. Then change the oil, adjust valves, re-torque cylinder heads (depending on your engine) then rip on it.

On a 930 I would say keep off full boost at first, you do not need boost to break in the rings.

The difference between the time your engine is running for the very first moments and the break in requirements for rings is not going to be within 20 or even 60 min.

Of course someone else will come up with micro reasons why you engine is tearing itself up if you do it in the wrong order but guys also agrue that the way you wash your car you are destroying the paint unless you use zymol or some other expensive putty.