Just to reiterate; the Scangauge uses the car's OBDII to get it's readings. It plugs right into the OBD port. Honda builds in an intake temperature sensor. It is already there on all Si's. All the SGII allows you to do is see this information that the car is using from that sensor. If it were a heat soak issue as you suggested then all the intakes should show a similar temp, but they are drastically different. Also, if it were a soak issue it would mean Honda's sensor was useless.
From the Honda Si press release:
Quote:
Civic Si: Programmed Fuel Injection (PGM-FI)
The Civic Si is equipped with a Programmed Fuel Injection (PGM-FI) system. The system monitors throttle position, engine temperature, intake-manifold pressure, atmospheric pressure, exhaust-gas oxygen content, and intake-air temperature. It controls fuel delivery by multi-holed injectors mounted in the cast-aluminum intake manifold. The ECU also tracks the operation of the engine with position sensors on the crankshaft and both camshafts.
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