[ASH]

I ran the test again without the tube from the air filter box to the fender and drove to work, so you can see how temps compare to the first test.

Time/Dist……Outside(F)…...Intake(F)……..Filter Box(F)………….…Notes
Start…………………17……………..…13 …………..…….15.8.......2 min. warmup, no change
0.5 mile…………...18.2…………...15.5……†¦â€¦â€¦â€¦..19.2
2.4 mile…………….15.8………………15.1…⠀¦â€¦â€¦....17.8
4.7 mile…………….17.8……………….17.7… ………....22.1
6.4 mile…………….17.8…………………25… ……………..69……..Top of mountain
8.5 mile.............16................33.3........... ...57.2
10 mile..............17................38............ ....60
.................................................. ............65.........Highest temp @ 45mph
14 mi.................18...............44............ ....77..........In town, 20 mph
30 Min.……………...19………………..76…⠀¦â€¦â€¦.....117.......30 Minutes after shutdown

Note that although outside air was about 10 F cooler, temp in the filter box was about 20 degrees warmer when traveling down the highway with this test. I feel this is the best I can do to simulate a circular, open air filter. I did get some tubing and hope to simulate the K&N style inake within the next couple of days. I'm just using corrugated plastic tubing to attach to my air filter box, but hopefully it will be a good comparison. Added a photo gallery showing how I set up the thermometers and sensors. Click on the icon of the camera to the right.