Uprev tuned but running lean

[Kamillio]

My Z was tuned back when it was still stock because I had an easy access to a tuner and I was soon moving to an area where there are no tuners anywhere close (Detroit area).

With post maf tubes, art pipes and hks exhaust I am now running in the 13.2 afr range. Before the exhaust it was more like 13.0 at WOT. I have a track day coming up in two weeks and won't have time to hit up a tuner (closest one to my knowledge is more than 5 hours away and works only week days).

From doing research on this forum I know optimal NA afr values are 12.5 to 12.8 for most power. But is 13.2 too high?

I have a basic Uprev cable that I used to get these values, but it doesn't tell me if I have engine knock. If there are some values that I can get from Uprev cable to help me determine safety/reliability of what my engine is running that would help too.


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