The stock SMIC is a restriction on a stock 1.8t engine. It has as much as 3 psi drop across it. That is way to big of a drop even if it is floored.
The reduction in intake temps will occur any time your on boost.
An increase 2 to 4 hp on a 90hp engine with the same maximum fueling is still better than a 2 to 4% improvement.
__________________
|