SamuraiFlash Posted August 14, 2011 Author Share Posted August 14, 2011 The stock ECU runs 13:1 AFRs below 4000rpm. If, under load conditions, you suddenly have one big turbo hoofing out a bar of boost at 3000rpm instead of one tiddler running 0.6bar, I don't think it'll be a happy result at those lean fuelling levels. Hi Ian are you still mapping the eManage Blue Ultimate? Quote Link to comment Share on other sites More sharing options...
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