I'm not sure what you want to discuss here... the burp or running leaner on outsides?
John
He's talking about run asymmetry, i.e, it runs faster on insides vs outsides despite running the same speed upright and inverted. This is the bane of modern existence, particularly since schneurles came along. It's the reason I run a RO-Jett, because it has essentially none of that.
A lot of people in the midwest/southeast don't even believe it exists, because it is much moderated in those conditions. You can take an engine that is perfectly OK in this regard in Indiana, and do nothing except transport it here, and all of a sudden, dead lean insides and dead rich outsides.
I think it is a fundamentally different issue than the Fox Burp. And much more interesting, we only have guesses and more-or-less random luck dealing with this issue - although the Jett has and interesting difference from most that relates directly to Lauri's theory, which seems to be mostly in line with min - differential scavenging or the fact that scavenging is affected by external acceleration.
Brett