Thank you for your insightful input! I did take that fact into consideration, but the only limiting factor is there is not efficiency data for TMICs that I found.
You are 100% correct that this data would allow a comparative decision, but there is none that I can find on TMICs. APS does post results for their front mounts, but that doesn't help this article.
While searching for data, I did stumble upon this webpage
, which lists hard data on intercooler efficiency enhancement, which I will add above. Raw numbers are:
40°C (Temp into throttle body) 84.2% (efficiency) Intercooler by itself
36°C (Temp into throttle body) 88.4% (efficiency) Air splitter onto intercooler
35°C (Temp into throttle body) 89.4% (efficiency) Water spray onto intercooler
32°C (Temp into throttle body) 92.6% (efficiency) Water spray + Air splitter onto intercooler
Also this thread
with info by WRX1 provides similar results.