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Today I was data logging with my predator and i saw a/f ratios as high as 17.5 and k/r of 1.98. I was worried that the a/f ratio was to high so I downloaded the stock tune and dataloged again. With the stock tune I still got a/f readings as high as 16.5 but no k/r.

When I dynoed the car before the predator the dyno read a/f at 10/1 so i figure the predator is reading very high.

I am not worried about it i am just trying to figure it out. Should I be worried about the K/R or the A/F ratio?

I also drove the car with the stock tune and it felt like a turd, much slower.

I would have loved to get a dyno tune but i couldnt find anyone in miami that tunes with HP tuners.
 

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May I quote you on that?
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22,046 Posts
Without a wideband O2 sensor, you're only interpreting readings from the factory sensors, which are not valid above and below 14.7 AFR.
 

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Mclaren F1 LM
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591 Posts
The a/f ratio from the predator is closed loop constant reading. You can't go by that #.
 
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