Thread: IATs 1, 2, 3...
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Old 06-30-2021, 07:21 PM   #3
radz28
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What's more confusing is sometimes GM switches back-and-forth to what reading they use. I think early C7 LT4s didn't use MAT but IAT or something like that. I know MATs are extrapolated from several other inputs, and I believe MATs are what ZL1s use, but I'm not certain. I'd verify for your year. HPTuners will probably be the best source for that.
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