I thought that the ideal AFR for the coop was 11.5:1 and it's a good idea to stay as close as this as possible, however, over on the PerfectTouch thread, there's a report from an experienced FCCUK'er that he's running up to 12.8:1 and doesn't seem too worried? Is 12.8:1 OK?
The reason for the question is that my AFR was going to 12.8:1 at 1.2bar and this was considered dangerous by an RR guy. It's worth noting that the car was also deting? If my AFR was still 12.8:1 and it didn't det would this be considered "safe"?