I was pitting at 11 minutes for my 25 minute main, and probably could have stretched it to 12 1/2. This engine is still being run a bit rich, and we just started leaning it out a bit approaching a race tune. Frank was handling the wrenching on it for me Saturday, and he's a bona fide tuning wizard for sure! I have just less than a gallon through this sucker, so I'm looking forward to full break-in and should see 13 minute run times with no problems. What can I say...it's nice to have an engine that you don't have to worry about that makes gobs of power, idles like a dream all day long, and gets great run-time!