iac relocation
Thread Starter
Le Mans Master
Joined: Jan 2006
Posts: 6,564
Likes: 6
From: Woodstock Georgia
iac relocation
Anybody out there relocated the IAC sensor forward to the air filter housing? Seems like there would not be any noticeable gains, but it is so easy as to be silly not to if there is an actual benefit. 
Race Director
Joined: Mar 1999
Posts: 16,950
Likes: 0
From: Stafford, Virginia Kittah, Kittah, Kittah...
I've done it on both my cars... Only real difference it seemed to make was that hot starts were easier... Those things do get heat soaked when you shut the car down...
I scanned mine and 20 minutes after shutting down the engine in the summer time the IAT temp showed 190F... It cools off pretty quickly again to ambient air temp after the engine starts though...
I scanned mine and 20 minutes after shutting down the engine in the summer time the IAT temp showed 190F... It cools off pretty quickly again to ambient air temp after the engine starts though...
Thread Starter
Le Mans Master
Joined: Jan 2006
Posts: 6,564
Likes: 6
From: Woodstock Georgia
Originally Posted by Redeasysport
Nothing to gain there friend.Sorta like K&N and airfoils.And I assume you mean IAT.Kinda hard to move the IAC from the TB. 
Saw this in the 101 projects book, did not look worthwhile, but after all it nevers hurts to ask.
Safety Car
Joined: Aug 2004
Posts: 4,194
Likes: 7
From: Euless Texas
It's one of those things thats really better if it's mounted in a place where the computer can get an accurate measurement of the actual temperature. I can only assume that from where it is, it will be heat soaked to some degree.
I had an '01 Formula and '02 Z28, and GM had the IAT sensor on the airbox, behind the filter, in front of the MAF on both occasions. Can't remember where it was on the C5 (didn't have it long enough to work in that area much), but I imagine it was similarly upstream from the engine so it would give an accurate read.
Probably won't gain much, if any, HP, but the computer will probably get the timing and mixture down a little better w/ an accurate temperature.....might run a little smoother.
I had an '01 Formula and '02 Z28, and GM had the IAT sensor on the airbox, behind the filter, in front of the MAF on both occasions. Can't remember where it was on the C5 (didn't have it long enough to work in that area much), but I imagine it was similarly upstream from the engine so it would give an accurate read.
Probably won't gain much, if any, HP, but the computer will probably get the timing and mixture down a little better w/ an accurate temperature.....might run a little smoother.
Racer
Joined: Jun 2002
Posts: 411
Likes: 0
From: Palm City FL
Recently i installed a new exhaust. Previously the car ran 13.1 @103mph. After an hour cool down (someone oiled down track) the car ran 12.9@105mph.
After the exhaust the car ran consistent 12.9 @106mph (four runs). Once again someone oiled down the track. After the hour or so of cool down, the car ran 12.6 @108mph. The last run for the night after another substantial cool down yeilded 12.5@109.8mph! (my personal best)
This night I happened to be data logging. What I noticed was intake air temp readings in the 120's for the 12.9 runs, and 90's for the mid 12 runs.
I had assumed that the engine water temps were roughly the same as my engine runs consistent @ 175 with a 180 stat. (I will need to double check the runs)
I am know considering relocating the IAT to the filter housing.
Has anyone tried this test or noticed similiar results?
PS My brother has an 02 LS1 camaro that also ran its best run after cool down. Coincedence?
After the exhaust the car ran consistent 12.9 @106mph (four runs). Once again someone oiled down the track. After the hour or so of cool down, the car ran 12.6 @108mph. The last run for the night after another substantial cool down yeilded 12.5@109.8mph! (my personal best)
This night I happened to be data logging. What I noticed was intake air temp readings in the 120's for the 12.9 runs, and 90's for the mid 12 runs.
I had assumed that the engine water temps were roughly the same as my engine runs consistent @ 175 with a 180 stat. (I will need to double check the runs)
I am know considering relocating the IAT to the filter housing.
Has anyone tried this test or noticed similiar results?
PS My brother has an 02 LS1 camaro that also ran its best run after cool down. Coincedence?
