in my opinion there is a reason nobody else is selling cores’s that thick. in a little bit of research it appeared that frontal surface area is more important that core thickness, that a core thickness too large and maybe not ideally suited for the motor/turbocharges per say can cause boost response issues etc. i’ve also been lead to believe that the cooling efficiency on a core that thick will becoming increasingly less the deeper into core you go (airflow from the front towards the rear) , i’m not very well versed in CAC but just wanted to pass along what i’ve read
You would be correct - the reason why the FMICs will perform better than the stock replacements is due to size. Not volume, but physical size, the height of the core is actually the most important dimension. In heat exchangers, they are most efficient with the highest temp differential, the hotter the air going into the inlet of the IC vs the cooler the ambient air hitting the IC. As the air moves through the IC, the core becomes less efficient as the air is being cooled so by the time the air gets to the outlet of the IC, it is at it's least efficient point. Now back to why a taller IC is preferred - when that hot air FIRST enters the IC, is where we need the most surface area so being tall is where it's at.
If you have 2 ICs that were the same exact volume and frontal surface area, but one was very tall and the other was thin and long, the tall one will win every time. Now of course if the inlet/outlets were on top and bottom, you would want a wider intercooler vs a taller one.