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My car doesn't bog in the extreme heat/humidity, but it is definitely not near as lively, even with 93 octane fuel. Here in North Florida we get days of 95-100 degrees with 50+% humidity all day long, and it can take a toll on intake temps (as you could imagine) especially in stop and go traffic. Sometimes I'll see up to 155+, however my IAM stay's pretty steady at 1.00 for the most part. Every now and again it will drop down to .88-.95 when it's really nasty outside. Now if I was driving the car hard (like on track, autocross, drift, etc) it may be a different story, and I wouldn't be surprised if the ECU pulled timing quicker.
-J.B.
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