Quote:
Originally Posted by ft_sjo
Because the ECU performs compensations for both fuelling and spark based on the temperature of air actually entering the engine. Measuring it before the supercharger will lead to less-than-ideal behaviour due to the compressor heating the air up. This is particularly bad on the Innovate 'non-intercooled' kit, as the Australian version with charge cooler should produce much more reasonable air charge temperatures.
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ok, that explains why it's better to have the sensor downstream of the compressor, but the post I quote was saying that the sensor should be upstream of the compressor.