I find the latest 5-08 maps and firmware the best so far. I run stage 1 70% on map 1 and 75% on map 2 for when the weather is cooler. Car pulls like a beast. I haven't data logged yet, so haven't tried pushing it higher but I definately feel an improvement at 75% on a cool evening. I have DCI intake, mid pipes and cat back and use 98RON gas.
You might want to wind back your UT mate as 90% is very high. Default for stage 1 is 70%.
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