[ASH]

Here is the data, it took me a little while to get it into a table format. Some notes, the mountain that I talk about is a 440 ft. climb over a distance of 0.8 mile, which is about 9% grade. I drove up it at 45 mph with O/D locked out. I don't get over 2500 rpm when I drive, so no quick starts or hammering the throttle. The thermometer has a max/min function, so I was able to check how high the temp got after the truck was shut off, but I don't know when it occurred.

Time/Dist……Outside(F)…...Intake(F)……..Filter Box(F)………….…Notes
Start…………………25……………..…25 …………..…….27.1
1 min………………. 25………………...25………………..26.4
4.7 mile…………….30………………..27.5…⠀¦â€¦â€¦....31
6.4 mile…………….28…………………28…†¦â€¦â€¦â€¦â€¦..33.6……..Top of mountain
…………………………………………†¦â€¦â€¦â€¦â€¦â€¦â€¦â€¦.........39………Highest temp after mountain, coasting down other side
8.5 mile.............29................29............. ...37.6
10 mile..............29................28............ ....38.7
.................................................. ...........42.........Highest temp @ 55mph
14 mi.................31...............31............ ....47..........In town, 20 mph
After this point, stopped in parking lot and let truck idle
30 sec............................................... ......59.5
1 min............................................... ........62.6
1.5 min............................................... .....66.6
2 min...............31.2..............35.5.......... ....70.2
2.5 min............31.2..............37.8............. .74.8
4 min...............31.2..............40.3.......... ....82.9
At 4 min. I revved truck to 1500 – 2000 rpm for about a minute, filter box temp continued to climb.
Shut truck off and checked data later.
25 min...................................46.......... ......112
?................................................. .............115............Max temp recorded
2.5 hrs..............43.................45............ .....49