intake air temp...

[DeeTurbo]

IAT sensor is usually about 2-3deg above ambient air temp, unless you have changed the standard inlet, in which case it's almost always usually higher temp than that.

FMIC acts as an inter-warmer as much as an inter-cooler depending on what is going on...

Monitoring pre/post intercooler charge temps would be interesting.


I won't get into too much to do with intercooling but there is not much advantage in intercooling TOO far unless the ECU knows it's that cool and always will be that cool. Without a charge air temp sensor this ECU/engine can't really benefit as much as it could from really good intercooling.

The best way this ECU/engine can compensate for cooler charge air temps is via the engine coolant temp! Not exactly a great system and that is why intercooling too hard won't gain you anything. Any benefit in charge air density is offset by the engine not changing the injection advance. You get more power with cooler charge air in theory, but it's offset by a later ignition of the charge air and fuel mix in theory.

Beyond a certain amount of intercooling the engine just won't see or care basically as it has no way of doing so.

The IAT on the other hand it CAN see, hence having that value as low as possible (or as close to ambient) is important.

Dave

Dave, do you know any cars that run the EDC15 ECU's running a charge temp sensor and if they do would it best possible to map one in?