Satoch I agree with you, you should be able to pit at 7.5min consistantly with these engines. Which is very good economy for a stock engine. I know people who have gone 10min. but it is the exception and not the rule. As far as your run time goes, if you switch to a turbo button you will see about an additional 45 seconds of run time. Which would allow you to pit at 7.5min with the stock restrictor.