What is a typical IAT i should expect with single NW in relation to Ambient temp?
It all depends on the ambient temp.
If ambient is below 40, then IAT will run somewhere around ambient + 7-10
ambient at 60, then + 10-12
ambient at 80 then +17-20
ambient over 90, then +20-25
all these numbers are crusin at 55-65
when you stop, all bets are off.