Also - folks don't seem to understand that unless you are under power/boost, an aftermarket IC will look basically like a stock IC....
Yup… just like when cruising and pushing 1-3 psi won’t show shit either, yet it’s still commonly referred to as a means of IC performance measurements.
The real test is watching a full WOT pull through the powerband and making sure the intake temp curve stays flat versus drastically peaking near the top.
Also it’s commonly ignored that the sensor reading temps is 6-8 inch away from the head that consistently in the 200+ degree range, so it’s naturally going to transfer the heat… point a heat gun at the top side of the map sensor and watch your iAT reading skyrocket.