So I tested temps under the hood. Conditions: 86F

Test 1 - Sitting in driveway in sun no fan on full engine temp

3FT from jeep outside temp - 86F
Intake area blocked off - 135F
Engine bay area 6in from intake area - 152F

Test 2 - Driving 25MPH with test lead in blocked off intake area

Intake area blocked off - 87-91F

Seems the barrier that comes with my K and N FIPK works. With zero airflow the difference is 17 degrees and while driving only 25MPH the temp is at or slightly above the outside air. Effective? Yessir!

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Fran:2002 Jeep Grand Cherokee Limited 4.7 quadra drive. 31in General Grabber AT2, OME HD, bilstein, IRO sway links, addco rear sway. Kolak 3in cat back flowmaster SUV 50, magnaflow 3in cat, airaid JR kit, ram air, P.I.E. aux adapter, surco 45x50, husky liners.http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=6&t=65276&p=719908#p719908

now put the stock airbox back in and do the same thing and drop an amsoil drop in filter and put a pressure / vac sensor in the cross tube

just eggin ya, glad it's workin for ya!

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03 Renegade (Black)
177k miles 3.7L gas - 45RFE
Command Trac / 4.10s
Lift: ft. 790+ rr. JBA4+
The last of the TrailReady Front&Rear Bumpers and TR Rock Rails
Jarhead Offroad light covers
31x10.5R15 RedLetter Grabbers on Blackrock Dunes
L.O.S.T #KD098632

Yeah yeah! almost a year and still loving it.

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Fran:2002 Jeep Grand Cherokee Limited 4.7 quadra drive. 31in General Grabber AT2, OME HD, bilstein, IRO sway links, addco rear sway. Kolak 3in cat back flowmaster SUV 50, magnaflow 3in cat, airaid JR kit, ram air, P.I.E. aux adapter, surco 45x50, husky liners.http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=6&t=65276&p=719908#p719908