intake air temp sensor

[philip j]

Looking for ideas... I want to change the location of the intake air temp. sensor on my EFI'd 3.4. I currently have it mounted on the intercooler close to the outlet/throttle body. Has anyone drilled/tapped their Carrera intake manifold and placed it after the throttle body? I do get a lot of heat soak where I have it installed now. Any ideas appreciated... TIA Philip

[jpnovak]

Yes, I have drilled and tapped a 3.2 manifold below the throttle in the center section on the passenger side. slight heat soak after sitting. Cools quickly after starting.

I don't think you will see any performance difference between a location below or above the throttle. Both are getting direct airflow, post intercooler.

[philip j]

Originally Posted by jpnovak

Yes, I have drilled and tapped a 3.2 manifold below the throttle in the center section on the passenger side. slight heat soak after sitting. Cools quickly after starting.

I don't think you will see any performance difference between a location below or above the throttle. Both are getting direct airflow, post intercooler.

Hey Jamie, that's what I was looking for... Have any pics of location? I was worried about obstruction/possible turbulence or air flow problems. Philip

[turbobrat930]

Just curious, Why is it heat soaking so bad? Have any pictures you could share? ( I know we have a lot of variations in I/C sizes, locations of exit points, etc) Is the sensor itself heat soaking, or the air coming past it?

[Tippy]

Philip, I have mine how you have yours and it's been the best so far. I'd think in the intake would be worse??

[turbobrat930]

I would also think that putting the Intake Air Sensor in the intake mani, would not only lend itself to more heat soak, but also, even though these engines are boosted, I would think that inside of the intake mani, the air would not be straight and free flowing, but turbulent ( I don't know how else to articulate it, not the best choice of words)

[philip j]

Originally Posted by turbobrat930

Just curious, Why is it heat soaking so bad? Have any pictures you could share? ( I know we have a lot of variations in I/C sizes, locations of exit points, etc) Is the sensor itself heat soaking, or the air coming past it?

I see a lot of heat soak when I have shut my engine down for 5 minutes or so... read here somewhere that the sensor after the throttle body was best. I am pulling my engine this winter to go through some things, and engine temp/intake temp are on the list... Philip

['76 911S 3.0]

Are you using a closed element or open element temp sensor? Both will heat soak with an engine off and exposed to the radiant heat; however, an open element will return to normal temps far quicker than a closed element sensor will once the engine is running.

[turbobrat930]

Here is where I have mine located.... Just above the TB on the 90 deg elbow. I do not see hardly any heat sink, and the second picture, is of the sensor itself.... Hope this helps.

[IMG]20140426_185415 by Brad, on Flickr[/IMG]

[IMG]IMG_0152 by Brad, on Flickr[/IMG]

[philip j]

using a GM open air for intake temps...

https://www.diyautotune.com/product/gm-open-element-iat-sensor-with-connector/

[xbmwguy]

I️ have mine located same as Brad with same results, minimal heat soak

[dos531]

How about one of these in that silicone elbow?
http://www.siliconeintakes.com/holset-turbocharger/-p-500.html

[TurboKraft]

We locate them in the intercooler's outlet, or the pipe between the intercooler and throttle body (not applicable to you, you have a silicone elbow). Never have an issue with heat soak.

Does your intercooler have cast tanks or sheetmetal? Even if it's a real Garretson-made one, he did both. The actual outlet section is sure to be sheetmetal, you could weld on a 3/8" NPT bung and move it there. The intake manifold is thicker cast aluminum, and probably the most likely to heat soak first.

[dap930]

Philip,

I am using the same Bosch IAT sensor as Brad, mounted in my Mustang throttle body. I still get some heat soak, but I changed my WUE from engine cycles to 0.1 seconds and increased my WUE time at high intake temperatures. I have 1.5 minutes of WUE at 220*F that tapers down in time at lower temperatures back to 0.0 minutes at 120*F which is where my engine is fully warmed up based on my CLT set up. Note that if you change WUE from engine cycles to 0.1 seconds, the y-axis still reads "engine cycles" instead of "seconds" in the WUE taper dialog box in TS.

[philip j]

Originally Posted by dap930

Philip,

I am using the same Bosch IAT sensor as Brad, mounted in my Mustang throttle body. I still get some heat soak, but I changed my WUE from engine cycles to 0.1 seconds and increased my WUE time at high intake temperatures. I have 1.5 minutes of WUE at 220*F that tapers down in time at lower temperatures back to 0.0 minutes at 120*F which is where my engine is fully warmed up based on my CLT set up. Note that if you change WUE from engine cycles to 0.1 seconds, the y-axis still reads "engine cycles" instead of "seconds" in the WUE taper dialog box in TS.

This sounds good Dennis, I should be able to leave my sensor where it is but manipulate the fuel settings to accommodate the heat soak. Looks like I'll have a big learning curve once I have the MS3pro is installed... Can't wait. ;-) Philip

[philip j]

Originally Posted by dos531

How about one of these in that silicone elbow?
Silicone Port System

That's a really cool fitting... LOL bet there's no heat soak there!