Best location for AIT sensor relocation?
Melting Slicks
Joined: Sep 2003
Posts: 2,062
Likes: 117
Le Mans Master
Joined: Dec 2003
Posts: 5,561
Likes: 448
From: Atlanta metro Ga.
That's as far away as you can get and still measure the intake air supply.
Le Mans Master
Joined: May 2006
Posts: 5,987
Likes: 18
From: DuBois PA
St. Jude Donor '11-'12-'13-'14-'15
There seems to be two schools of thought here. Which is better, NO wait! 
I’ll start a pissing contest. What are the advantages of placing the AIT as far away as possible and placing it as close to the engine as possible?
I understand that one would be reading a colder and denser air charge for performance while the other way would be a more accurate measure of what’s actually hitting your cylinders…
So what are the pros and cons?
I’ll start a pissing contest. What are the advantages of placing the AIT as far away as possible and placing it as close to the engine as possible?I understand that one would be reading a colder and denser air charge for performance while the other way would be a more accurate measure of what’s actually hitting your cylinders…
So what are the pros and cons?
Le Mans Master
Joined: Dec 2003
Posts: 5,561
Likes: 448
From: Atlanta metro Ga.
Closer to the intake (like in a pre-2001 Honker install) provides the most accurate data for fueling and ignition timing, furthest away will assure ignition timing will not be pulled prematurely..
The reality is ANY location other than stock is "wrong". The PCM's tables were designed around the stock sensor placement.
The closer to the throttle body = higher temps recorded = more likely to pull timing and lean the A/F mixture, further away = lower temps = less likely to pull timing and richen the A/F mixture.
If you have the car tuned, no one location has an advantage over another.
In a stock config, you might gain a very, very small advantage by placing it further away from the TB (2 or 3 degrees of timing will cost you more HP than a .25% bump in A/F mixture).
The reality is ANY location other than stock is "wrong". The PCM's tables were designed around the stock sensor placement.
The closer to the throttle body = higher temps recorded = more likely to pull timing and lean the A/F mixture, further away = lower temps = less likely to pull timing and richen the A/F mixture.
If you have the car tuned, no one location has an advantage over another.
In a stock config, you might gain a very, very small advantage by placing it further away from the TB (2 or 3 degrees of timing will cost you more HP than a .25% bump in A/F mixture).
Last edited by Dan_the_C5_Man; Jan 21, 2007 at 01:31 AM.
Le Mans Master
Joined: May 2006
Posts: 5,987
Likes: 18
From: DuBois PA
St. Jude Donor '11-'12-'13-'14-'15
Closer to the intake (like in a pre-2001 Honker install) provides the most accurate data for fueling and ignition timing, furthest away will assure ignition timing will not be pulled prematurely..
The reality is ANY location other than stock is "wrong". The PCM's tables were designed around the stock sensor placement.
The closer to the throttle body = higher temps recorded = more likely to pull timing and lean the A/F mixture, further away = lower temps = less likely to pull timing and richen the A/F mixture.
If you have the car tuned, no one location has an advantage over another.
In a stock config, you might gain a very, very small advantage by placing it further away from the TB (2 or 3 degrees of timing will cost your more HP than a .25% bump in A/F mixture).
The reality is ANY location other than stock is "wrong". The PCM's tables were designed around the stock sensor placement.
The closer to the throttle body = higher temps recorded = more likely to pull timing and lean the A/F mixture, further away = lower temps = less likely to pull timing and richen the A/F mixture.
If you have the car tuned, no one location has an advantage over another.
In a stock config, you might gain a very, very small advantage by placing it further away from the TB (2 or 3 degrees of timing will cost your more HP than a .25% bump in A/F mixture).
I always pay attention to your responses in here, you've only been wrong twice!!!!
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Thread Starter
Racer
Joined: Aug 2006
Posts: 301
Likes: 0
From: GA
Ask first!
Today I was reminded a very important lesson! Ask questions before you spend your cash. Now feel like I wasted my money on the AIT relocation kit. Fortunately, it didn't cost me too much. I can eat this one. Different story if its a cam, heads, etc...
Melting Slicks
Joined: Sep 2003
Posts: 2,062
Likes: 117
Closer to the intake (like in a pre-2001 Honker install) provides the most accurate data for fueling and ignition timing, furthest away will assure ignition timing will not be pulled prematurely..
The reality is ANY location other than stock is "wrong". The PCM's tables were designed around the stock sensor placement.
The closer to the throttle body = higher temps recorded = more likely to pull timing and lean the A/F mixture, further away = lower temps = less likely to pull timing and richen the A/F mixture.
If you have the car tuned, no one location has an advantage over another.
In a stock config, you might gain a very, very small advantage by placing it further away from the TB (2 or 3 degrees of timing will cost you more HP than a .25% bump in A/F mixture).
The reality is ANY location other than stock is "wrong". The PCM's tables were designed around the stock sensor placement.
The closer to the throttle body = higher temps recorded = more likely to pull timing and lean the A/F mixture, further away = lower temps = less likely to pull timing and richen the A/F mixture.
If you have the car tuned, no one location has an advantage over another.
In a stock config, you might gain a very, very small advantage by placing it further away from the TB (2 or 3 degrees of timing will cost you more HP than a .25% bump in A/F mixture).
My choice was directly dictated by the heat soak problem related to the OEM location in the MAF for the 2002 ZO6 that was bothering my OLSD tune.
Then I went Mafless and I had to relocate the IAT sensor.
This choice is not better power related or producing any more power by itself but it is simply more accurate...
And the heat soak problem is something I dont' deal with anymore...
Instant response of real IAT from the sensor...
No more LEAN HOT START...
I have seen only advantages, and power stays the same, just tuning will follow all the algorithms inside your VCM.
If the goal is to gain the loss on timing ("power") due to the IAT high temp, go for the $1.29 "Tiristor mod" (Radio Shack).
When I tested it I had my IAT was stuck for ever at 64°...good on one side, very bad on the other...
Christian
