[ASH]

I ran a test with the intake pulling air in from the right side of the engine compartment plus with the air filter box and the tube insulated. The insulation I used may not have been the best. It is bubble wrap layered with aluminum foil that you use to wrap water pipes that I picked up last night at the hardware store. It only has an R-4 insulation rating, but I thought the foil surface would help reflect the heat. Where I could, I double wrapped the bottom of the filter box. No pictures because it is butt ugly.

Time/Dist……Outside(F)…...Intake(F)……..Filter Box(F)………….…Notes
Start…………………33……………..….. 31…………..…….31
2 min………………. 34………………....31...……………..33.. ..Idling, warmup
0.5 mile…………….35………………....32…. .……….....35
2.4 mile…………….35.1……………….34.4… ………....35.6
4.7 mile…………….36.7……………….36…†¦â€¦â€¦.......38.7
6.4 mile…………….36.3…………..….41.6…⠀¦â€¦â€¦â€¦â€¦43.5……..Top of mountain
…………………………......…………†¦â€¦â€¦â€¦â€¦â€¦â€¦.........48.5………Highest temp after mountain, coasting down other side
8.5 mile.............37.5..............41.8.......... ..46.9
10 mile..............36.7..............43......... .....45.1
.......................37.3..............45.6.. ..........48.........Highest temp @ 55mph
14 mi................37.3..............45.6........ .....51..........In town, 20 mph
After this point, stopped in parking lot and let truck idle
30 sec..............38.7...............47........ ......59.9
1 min................38.1...............52.4........ ....69.1
1.5 min.............38.1...............52.4........... ..74.7
2 min................38.5...............59.8........ .....77.5
2.5 min.............38.9................63.2.......... ...82.2
Shut truck off and checked data later.
40 min...............40.................59........... .....96

The insulation helped only slightly when moving, but kept the air about ten degrees cooler when stopped. I did notice the temperature did not rise as quickly at the stop signs. Notice the temp at 40 minutes, it is 40 degrees cooler in the filter box. Not sure why the temp inside the engine comparment is cooler, other than the tube may be acting like a chimney and is funneling air out through the filter box and tube towards the wireless receiver.

A member from another site sent me a fiberous type of insulation that he says is used for catalytic converters. I wrapped this around the stock intake and will put it on tomorrow and run the test with the stock intake and the filter box wrapped. I will run a final test with only the tube wrapped. I am curious if the temps will be lower when pulling the air from the fender. Also, a better type of insulation on the air filter box might help, but being the cheap$kate that I am.........