I just got my car finally boosting reliably and 90 percent tuned. My question is what is a good IAT because according to the dataloger on bre I run as high as 120 when its about 85 degrees out. Is that reasonable. Thanks in advanced.

 

your good.

most run up to 135-140 cruising on hot days.

 

---- IATs when cruising or at idle. They mean nothing relevant, that's just manifold temp..

Pay attention to IATs under boost. 25-30 over ambient is ideal, but a little less than ideal works fine too. Past 130 in boost is scary.