Originally Posted by Tree DR

Have you ever noticed how much air is flowing trough the radiator when your at idle? Must be why the fan clutch engages to keep the ac condencer working. With a fluid coupler you aren't going to spin fast enough to keep up with the air flow from forward motion hence the restiction. If you ever moniter the IAT the hotter the motor the hoter the IAT not because of the turbo or the temps would drop off every time there was no boost. The turbo does increase the temp when the boost increases. It's the radiator heating up the intercooler because there is no air flow throught it. Must be why there a big gap between the inter cooler and the radiator to let some of the air get through, because the radiator fan isn't pulling it through the intercooler.

Originally Posted by isbeinside

i dont think it would be hard to make a setup i have seen them on sled pullers, but the concern would be if you want to stare at the check engine light all the time. the fan clutch is monitored and electrically locked up by the ecm

Originally Posted by Tree DR

IAT intake air temp. Is that at the filter box or somewhere else?

Originally Posted by drewblood

I monitor it at the intake and dont notice a drop in temp till driving wether it be from air flow or pressure at a idle it increases and cools while diiving and with it in the intake it averages 10* hotter than ambient air temp unless its over 90* out side than its 15 to 20* so Im not if Im getting false readings or not but the stock CAC seems pretty efficant intake air is relativly cool compared to claims of 200* + temps claimed by companys selling there brand of CACs

Originally Posted by jrussell

The "MAP" sensor mounted on top of the intake manifold is also a dual purpose temp/pressure sensor.

AFAIK the one in the box is considered the IAT. Monitoring that figure won't tell you how efficient the IC is though, unless you're also monitoring it on the other end to compare the two.

Originally Posted by Tree DR

My buddies 04.5 doesn't have the fan connected and it doesn't throw any codes?

Originally Posted by drewblood

sorry jrussel and treedr just saw the thread again I have a three in one gauge from dakota digital egt boost and a temp sensor for a auto but with my manual I felt iat would be a better thing to monitor its drilled and threaded into the intake right above the grid heater

Originally Posted by vzdude

2 different sensors. Both feed their info to the ECM for fueling adjustments though, and both reffered to as IAT!

The combination, dual function Intake Manifold Air Temperature Sensor/MAP Sensor (2) is installed into the top of the intake manifold.
The IAT portion of the sensor provides an input voltage to the Engine Control Module (ECM) indicating intake manifold air temperature. The MAP
portion of the sensor provides an input voltage to the ECM indicating turbocharger boost pressure.

The combination, dual function Inlet Air Temperature/Pressure Sensor (4) is located on the air cleaner (filter) cover
The Inlet Air Temperature/Pressure Sensor is a combination dual-function sensor. The sensor element extends into the intake air stream at the top of the air filter housing. Ambient air temperature as well as barometric pressure is monitored by this sensor.