Ok, so my relocated IAT still was ticked off with the higher than normal ambient temperatures after I installed the FWI on my 01. I was about 30* over ambient idling in traffic. 10* or so on the highway cruising. I have the Iat right next to the filter.

So I figured the best way to fix this is to isolated the Air Filter from the engine bay heat.

I used spray insulating foam combined with 5 layer of the reflective bubblewrap insulation all the way around the filter. Turned out decent, waiting for the expanding foam to dry to see if it made any difference. In the 00+ there is a huge opening on the engine side of the fenderwell that allows hot air into the fenderwell. Not on my car.

I also created a new opening at the bottom splash guard of the fender to allow cold air in. It was enlarged to about 7" in diameter, I cut out a triangle section.





Once it drys I will remove some of the foam .

Looking good, I used some of that bubble wrap and duct work tape to do something similar on my 02 and i still see higher than ambient temps even with the headlight out exposing the filter to the air. I'm assuming the air is getting heated once in the engine bay.

Nice work. Did you create your own custom IAT hole in the filter? I may be doing something similar when I get my Intense FWI.
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There'* no need to put the IAT in the filter, nor is there room.

Do what I did on the Zilla:

http://www.bonnevilleclub.com/forum/...ic.php?t=79065

So you DO recommend putting the IAT closer to the filter? Hadn't you said in the past that this gives the PCM "false" information because the air will be warmer by the time it reaches the throttle body?

I've ALWAYS run mine in the filter or very close to it. On both cars. Series 1 IAT harnesses are longer, and it'* easy to do that.

There is debate on the subject, but your MAP and O2 sensors are smart enough to make any corrections necessary.

I have found on several cars at WCBF that the body of the IAT sensor heats up, possibly causing a false high reading.

Hmmm so that IAT extension harness sitting in the basement shall be put to good use after all. I would definitely believe the housing heats up because like i had said, i can remove my headlight and when i first start driving i will get ambient temperatures but as i drive more and more the temp keeps climbing. I'll have to test this out because i have heard the intense tubing doesn't get too heat soaked but i had never expected the IAT housing as the culprit. Is that just a grommet you have in the hole you drilled at the tube/filter adapter?

Yup. Just a grommet. Pick the ID for the diameter of the sensor nose, and the OD for whatever size hole you want to drill.

I pulled apart the hose and filter a bit to expose part of the aluminum coupler. It looks black in those pics, cuz I wrapped it with high-temp cloth tape for cosmetic reasons.

Good News, it works great. I mean great. I sliced off some of the foam (it got bigger) and now the filter is completely isolated from the bumper, radiator, and the engine bay. IAT readings are extremely close to ambient.

Still getting KR though, so my KR issue was not one of pulling in hot air.

haha

join the club...i have KR with the stock pulley....I have narrowed it down to the Stock PCM TM