Those particular graphs were made with www.autotap.com
You can do the same thing with a SCT X-cal2 as well.
I've since made a prototype cold air box that surrounds the filter. (including a true ram air ducting fed by the grill)
The cold air box has made a big difference in temp swings. Although I've not been able to duplicate those temp measures because its not summer yet.
Driving the same stop and go traffic route in 30F temps.. I only see about a 12F rise in temps. Cools off almost instantly when I start to move.
When it gets warm enough I'm going to make a fiberglass housing to replace the prototype acrylic one I have now.
Here is a WEB PAGE
showing the box as I've been running for three months now.