Must have gotten that from the accent.
That's still 50 degrees over ambient. So if ambient was 90 degrees you are still sitting at 140f. If that aftercooler was 100% efficient, which it isnt even close to, the temps would come in at the coolest of 140f. Since the charge is 230f I'm guessing it still enters the lower plenum at least around 170f, robbing you of power and not pulling any timing.