So today I decided that I would see what she would do in 86° temperature i ran 154 miles an hour and the IAT's went to 171.not bad IAT for 154 mph,, here's a picture of the graph.here 3-30-12.
with my latest mod, my IAT's,, running 60 to 70 miles an hour are 3 to 4° above ambient,, running 80 miles an hour my IAT's are 4 to 10° above ambient., my engine temperature runs approximately 100° above ambient at normal operating speed..speed goes up temperature goes up both engine and IAT.

I made three runs one at 139, one at 147, and one at 154. the log you're looking at is the one for the 154.