After 1500KM, I performed a leak-down test, all cylinders are within between 0 and 1%, so I am pretty satisifed that the rings seated, or is that a bad conclusion from a leakdown test?
Haven't really got a sense of oil consumption because of the number of oil changes.
I spent a bit of time on a dyno and got the following A/F info - it looks to me that there is a pretty good chance that the lean condition in mid range caused the detonation that broke the rings.
I am planning on sending the chips to Mr. Wong for reprogramming, and to find out what the advance curve looks like. I think that the lean condition plus likely overly aggressive timing (for the fuel/air temp at one track session) are the root causes of teh broken rings.
However, I am really on the fence about whether to retain the (old) Autothority MAF that has been on the car for more than 10 years, or revert to the stock setup. Any suggestions/opinions?