Modding the fenderwell for colder air, isolating engine bay - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

Reply
 
 
 
Thread Tools Search this Thread
Old 09-03-2007, 03:07 AM   #1
Senior Member
True Car Nut
Thread Starter
 
Join Date: Jul 2004
Location: Twin Falls, Idaho
Posts: 7,545
Thanks: 0
Thanked 1 Time in 1 Post
Hans is on a distinguished road
Default Modding the fenderwell for colder air, isolating engine bay

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 .
Hans is offline   Reply With Quote
Old 09-03-2007, 07:52 AM   #2
Senior Member
Posts like a Camaro
 
Join Date: Jan 2004
Location: Aurora, Illinois
Posts: 922
Thanks: 0
Thanked 0 Times in 0 Posts
1994se is on a distinguished road
Default

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.
1994se is offline   Reply With Quote
Old 09-03-2007, 10:33 AM   #3
Senior Member
Posts like a Turbo
 
LeSabreUltra's Avatar
 
Join Date: Feb 2007
Location: Alabama
Posts: 494
Thanks: 0
Thanked 0 Times in 0 Posts
LeSabreUltra is on a distinguished road
Default

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.
.
.
.
LeSabreUltra is offline   Reply With Quote
Old 09-03-2007, 11:52 AM   #4
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

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
willwren is offline   Reply With Quote
Old 09-03-2007, 12:31 PM   #5
Senior Member
Posts like a Camaro
 
Join Date: Jan 2004
Location: Aurora, Illinois
Posts: 922
Thanks: 0
Thanked 0 Times in 0 Posts
1994se is on a distinguished road
Default

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?
1994se is offline   Reply With Quote
Old 09-03-2007, 12:35 PM   #6
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

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.
willwren is offline   Reply With Quote
Old 09-03-2007, 12:40 PM   #7
Senior Member
Posts like a Camaro
 
Join Date: Jan 2004
Location: Aurora, Illinois
Posts: 922
Thanks: 0
Thanked 0 Times in 0 Posts
1994se is on a distinguished road
Default

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?
1994se is offline   Reply With Quote
Old 09-03-2007, 12:53 PM   #8
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

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.
willwren is offline   Reply With Quote
Old 09-03-2007, 04:56 PM   #9
Senior Member
True Car Nut
Thread Starter
 
Join Date: Jul 2004
Location: Twin Falls, Idaho
Posts: 7,545
Thanks: 0
Thanked 1 Time in 1 Post
Hans is on a distinguished road
Default

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.
Hans is offline   Reply With Quote
Old 09-03-2007, 08:02 PM   #10
Senior Member
Certified Car Nut
 
Join Date: Oct 2003
Posts: 19,756
Thanks: 0
Thanked 0 Times in 0 Posts
1993 SLE is on a distinguished road
Default

Quote:
Originally Posted by Hans

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
1993 SLE is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Thrasher, Fenderwell or Gutted??? WoodyBalto Performance, Brainstorming & Tuning 6 08-26-2008 05:40 PM
My fenderwell intake, with pics! LittleHoov Performance, Brainstorming & Tuning 3 11-22-2006 06:55 PM
Fenderwell intake. Don Young Performance, Brainstorming & Tuning 4 09-05-2005 11:05 AM
ISO: Part numbers for fenderwell covers Rogue General GM Chat 7 07-09-2004 01:26 PM
Colder plugs???? OLBlueEyesBonne Forced Induction 1 05-08-2003 07:29 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 02:43 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.