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Hi, coming from a tuning background, you are running really lean there , turbo charged cars should be running between 11-13 on the AFR on full boost, depending on the timing. If you ever hit 14-16 on a Jap car , it would have gone pop by now, just shows you how well engineered these engines and ECU are. This ECU must be running knock detection and pulling power back tremendously. I would suspect its your de-cats that has caused this, as the exhaust is flowing without any restrictions.
Have you dyno'd the car with the cats on before ? so you can compare the AFR, your car looks great . Get it seen to before you do anymore crazy runs .
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