Quote:
Originally Posted by ft_sjo
OK, stop inventing an acronym "MAT" right here. It's either IAT or ACT. OEM's call it IAT whether it's n/a or forced induction. The problem that needs solving is how to move the IAT sensor to the right place, after the supercharger. Shouldn't be a problem for some of experienced tuners. Then the IAT-related strategies in the ECU can work properly (e.g. spark retard vs. IAT, which is crucial).
I would be very surprised if there wasn't an off-the-shelf ntc air temp sensor with a similar linearisation curve to the one built into the MAF sensor. You will want an open-element one, not solid, for faster response. Just a case of finding somewhere suitable in the plenum to mount it and patch it into the wiring loom/harness.
Let's not bodge stuff chaps!
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I used the term MAT (Manifold Air Temp) because that is what mitsubishi called the manifold air temp sensor on the Evo X. The X also had an intake air temperature sensor that was location in the MAF sensor.
As you said, with NA applications, the air temp sensor will most often be at the beginning of the intake tract. In forced induction applications it seems to depend on the manufacturer. I think at times they make assumptions about the efficiency of the turbo and inter-cooler etc and still just use a temp sensor at the beginning of the intake tract, the evo 8 and 9 was this way.
I agree it would be best to place a new sensor in the post compression air stream and wire it back into the stock harness so the compensation tables are actually useful. The sensor scale table is in the rom so it the new sensor does not have to match, just needs to be known.