thanks for the temp #'s. I haven't read this whole thread but I will relate my experiance with the stock air box and some properly placed hood vents on my 06 LJ Rubi. I have had the vents on my jeep for the last 18 months but have only recently installed the scan gauge. I have noticed that my IAT are about 5-10 degrees higher than outside air temps at highway speeds (50 plus). I am comparing the IAT on my scan guage to the air temps on my mirror. when I stop or am traveling slow they rise much higher; around 20-40 degrees higher. my findings have been pretty consistent from 30 degrees up to near 80 degrees. my start up temps have been typically just under or at outside temps (when cold) to very near outside temps (when warmer). from what I have seen anyone looking for a CAI will probably benefit more from some hood vents then they ever will from a CAI.I have the Volant CAI & Snorkel installed in separate occasions. If you liked the Volant CAI, you will love it with the snorkel.
I have the same feedback as yours, but with the snorkel, it's even better.
I installed my Scan Gauge after installing my Volant CAI. The Volant CAI still sucks hot air from under the hood as a divider to block engine heat from the intake is not included in the kit (but can be easily made) and the intake in still under the hood.
The outside air temp in where I live is constantly 90-deg during the day. With the Volant CAI, start-up temp, as shown on Scan Gauge's IAT reading, shows on average 135-deg. and warmed-up engine is usually around 180-deg. With the snorkel, start-up temp is at 90-deg. with warmed-up temp average at 120-deg.
Just posting this as a contribution for everyone's reference based on my experience.