types of IAT's
I think this pertains to the particular PCM and its built
in (or tune-table) calibration curve, ohms vs temp. I
have never seen a 3-wire IAT myself.
If you need the IAT to respond quickly to inlet air temp
then you want an IAT sensor with as low a thermal
mass as possible and as little shrouding by its mechanical
enclosure as possible. Stock 4th gen F-body, the IAT is
chubby and set down in a big plastic shell with airflow
partially blocked. But you can find termistors with the
same R-temp curve that are much tinier, and bare.
The thing to worry about is, what happens to such
a component when suspended in a high flow but variable
air stream - how long before the resistor nugget ends
up fatiguing the leads that suspend it, and it heads for
daylight the hard way?
in (or tune-table) calibration curve, ohms vs temp. I
have never seen a 3-wire IAT myself.
If you need the IAT to respond quickly to inlet air temp
then you want an IAT sensor with as low a thermal
mass as possible and as little shrouding by its mechanical
enclosure as possible. Stock 4th gen F-body, the IAT is
chubby and set down in a big plastic shell with airflow
partially blocked. But you can find termistors with the
same R-temp curve that are much tinier, and bare.
The thing to worry about is, what happens to such
a component when suspended in a high flow but variable
air stream - how long before the resistor nugget ends
up fatiguing the leads that suspend it, and it heads for
daylight the hard way?
Thread Starter
On The Tree
Joined: May 2012
Posts: 133
Likes: 1
maybe I should be asking the question another way
I am wanting to be strictly Speed Density for tuning purposes and so need to install an IAt in the air stream as the MAF took care of that before
so the appropriate question might be - what are you speed density guys using for an IAT and do you have a part number
thanks
Ken
I am wanting to be strictly Speed Density for tuning purposes and so need to install an IAt in the air stream as the MAF took care of that before
so the appropriate question might be - what are you speed density guys using for an IAT and do you have a part number
thanks
Ken
Thread Starter
On The Tree
Joined: May 2012
Posts: 133
Likes: 1
its a chopped 48 Mercury car - so everything will be custom built - and no air boxes lol
so most likely it ill be mounted in the inlet pipe 6" or so from the throttle body unless someone tells me to do it better/different
so most likely it ill be mounted in the inlet pipe 6" or so from the throttle body unless someone tells me to do it better/different
Trending Topics
https://ls1tech.com/forums/forced-induction/743423-threaded-ls1-iat-sensor-part.html
It's a common and cheap part. Plug and play.
Although not a bad idea to check accuracy with ice and boiling water and recalibrate the PCM if you want perfect results.
It's a common and cheap part. Plug and play.
Although not a bad idea to check accuracy with ice and boiling water and recalibrate the PCM if you want perfect results.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
Moderator
Joined: Aug 2010
Posts: 7,323
Likes: 529
From: Ann Arbor, MI
I have my IAT mounted behind a head light so that it reads as close to ambient air is possible. Otherwise I was getting terrible heat soak (40F+) from idling in the staging area of the drag strip; resulting in a very lean AFR at the beginning of the run.
Stock cars are engineering to minimize heat soak on the IAT, but that can be difficult to duplicate in a swap. For example, in a C5 Vette (as documented by RonSSNova), the IAT sits in front of the radiator and Ron was only experiencing 10F of heat soak at the drag strip.
In my case, if the air going through the intake system gets heated more than ambient temperature, my engine will run a bitter richer than intended, which is better than the other way around.
Stock cars are engineering to minimize heat soak on the IAT, but that can be difficult to duplicate in a swap. For example, in a C5 Vette (as documented by RonSSNova), the IAT sits in front of the radiator and Ron was only experiencing 10F of heat soak at the drag strip.
In my case, if the air going through the intake system gets heated more than ambient temperature, my engine will run a bitter richer than intended, which is better than the other way around.