I've had a working awic system for years. I swapped the engine to a different car that has a lot more seating and storage space. The old car had a lot of ghetto stuff done to it, including things that kept the engine bay cooler.

The setup has always been the same, but have noticed recently some IAT's rising the longer I drove.

I have been told the core is placed perfectly, there is about 18 inches from the turbo outlet to intercooler and 3 inches from intercooler outlet to throttle.

I debate this. I'm starting to feel for a street-driven car both the core AND reservoir should get out of the engine bay to behind the bumper near the wheel-wells.

I feel the throttle response change would be very negligible on a turbo this large.

Data:
-114 deg F water temperature after a drive home from work with stop'n'go driving
-80 deg F outside temperature
-140 deg F engine bay temperature

The 'first pull' on the car yields IAT's below ambient with watermeth injection. So I don't care to swap to a fmic. I just want to gain back a few whp from using a smarter design.

Anybody else NOT have the awic core in the engine bay?

 

With your A2W setup, what is the size of your front mounted heat exchanger (aka A2W radiator)?

I never had this issue with my Evo 9, and my main A2W cooler unit is mounted in the engine bay, and so is my reservoir tank. I made a custom unit out of the Garrett 1000HP core, and the reservoir holds about a quart.

The front radiator for the A2W setup should provide plenty of cooling to over come the hot engine bay temps and low CFM at idle/low RPM speeds. If you are experiencing heatsoaked IAT's, you just need to improve the airflow that is cooling the A2W radiator.

Also, what sensor are you using to monitor IAT's? You will want a faster responding sensor that can read slow moving air. The stock Honda IAT sensor does a poor job sampling air temps at low air speeds and could be taking the temperature of the metal that has been heatsoaked in the engine bay. A GM type IAT sensor would do the trick. I am running a Prosport dual IAT gauge that shows pre and post intercooler temps and it works great

 

Ahhhh, I was hoping somebody would mention the awic radiator in the system.

I had this sneaking suspicion that is the issue. The old car had a large radiator for the awic system, almost the size of a full-on OEM engine radiator. It was in front of the engine radiator and air conditioning radiator. So around town, those fans would have pulled air through it in stop and go traffic.

That radiator failed when I forgot to put anti-freeze in the water for winter, and the core busted.

In the engine swap I used an OEM smaller auxiliary radiator that is much smaller, maybe 6" x 8". I used it because the car already had it and it seemed to be in a good place for airflow.

I think I need to go to the local u-pull-it yard to find an OEM sized radiator to change that thing out with, and go back to how it was originally arranged.

Dummy, I should have known better.