Curious to see what others are seeing on the track. If you have the data, please share IAT's and ambient Temp. I'm interested in both NA and FI.
My setup is SC and using a V-mount IC. Intercooler is fairly small and air filter isn't in a great spot for getting ambient air.
Data below is from a sunny day in the low 80's - track temperature probably around 100 F. IAT's ramp up quickly but stabilize after 1-2 minutes of race pace.
4:46 - Warm up lap, IAT = 100 F, ECT = 161 F
10:42 - After a couple of laps at lap record pace, IAT = 150 F, ECT = 165 F
12:18 - Cool down lap, IAT's drop to 120 F, ECT stays at 165 F

Coolant temps stabilize around 165 F
IAT's range from 140-160 F under load

With the high IAT's and low ECT's, I may increase my ducting to the IC at the expense of obscuring radiator flow.
Also working on cooler air to the filter (pre-SC).
I'm likely giving up noticeable hp due to density and ignition retard. How close to ambient can IAT's get on track? I've seen some factory FI cars with IAT's in the 250-300 F range!

 

Where is your IAT sensor located? What kind of sensor are you using?

Do you drive the car on the street, if so how are the IAT's on the street?

How much boost are you running?

 

I'm NA but using a K&N FIPK and a OBDII reader and I've never seen IATs more than 30* above ambient, other than on a cool down drive through the paddock and around the facility, where it jumps to 50* above.

 

AP1 IAT sensor in intake manifold. On the street, IATs generally drop to about ambient under full throttle blasts and rise to 20-30 higher in stop and go - higher when idling for a long time. Cruising is usually 10-20 above ambient.
Running 12 lbs boost.

 

I'm a 2007 AP2 NA, stock airbox and radiator, on a 90 F degree day I run about 105 IAT and 200 ECT on the track, I've seen up to 115 IAT and 210 ECT on the hottest day in Florida at a long track (something like Sebring), this is 10+ minutes into the session. This makes me think the stock radiator is actually undersized for this car based on your numbers.

re you still running A/C? I am so that could be blocking some airflow to the radiator.

 

Your ECTs seem very low. The thermostat should keep ECT no less than ~190. Are you reading between the radiator and engine?

 

Using a Mugen T-Stat and fan switch. Temps rise to 200 F as soon as I come off track. Reading off factory AP1 sensor.

 

Factory 2.0 l long block, factory intake, factory temp sensor in factory location (intake manifold.) 70 deg F day.