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MS3 Pro settings/TunerStudio MS Ultra

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I have a SRT4 2.4l turbo in a small tire mini rod pulling tractor running on VP X98. I'm wondering how do I change my target AFR gauge value number from pump gas stoich 14.7 to X98 stoich 8.9? I have the stoich set to 8.9 in the general settings tab. Another question for the general settings tab, being a turbo charged engine do I set the upper limit kPa setting above 100 in the baro sensor settings section being that the engine will see a kPa in the range of 300?

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