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intake air temp sensor

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
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87 930 GHL/Rarlyl8 dual/Garretson/GT3582R/1 Bar/Wevo shift, mounts/Meth inj/LC-1/Custom Fuchs/Carrera intake manifold/Xtreme Carrera heads P&P/3.4/DR 993SS cams/ Mahl/Pauter/JE/Niresist/ARP/twin plug coil packs/8.25:1/KEP stage 2/twin tials/close 2,3,4th. SDS EFI tuning always in progress. 500+ HP, BTSOMP Dyno
Old 11-24-2017, 03:54 PM
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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.
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Old 11-24-2017, 06:35 PM
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Quote:
Originally Posted by jpnovak View Post
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
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87 930 GHL/Rarlyl8 dual/Garretson/GT3582R/1 Bar/Wevo shift, mounts/Meth inj/LC-1/Custom Fuchs/Carrera intake manifold/Xtreme Carrera heads P&P/3.4/DR 993SS cams/ Mahl/Pauter/JE/Niresist/ARP/twin plug coil packs/8.25:1/KEP stage 2/twin tials/close 2,3,4th. SDS EFI tuning always in progress. 500+ HP, BTSOMP Dyno
Old 11-24-2017, 06:52 PM
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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?
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Old 11-27-2017, 12:00 PM
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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??
Old 11-27-2017, 12:12 PM
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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)
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Old 11-27-2017, 12:36 PM
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Quote:
Originally Posted by turbobrat930 View Post
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


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87 930 GHL/Rarlyl8 dual/Garretson/GT3582R/1 Bar/Wevo shift, mounts/Meth inj/LC-1/Custom Fuchs/Carrera intake manifold/Xtreme Carrera heads P&P/3.4/DR 993SS cams/ Mahl/Pauter/JE/Niresist/ARP/twin plug coil packs/8.25:1/KEP stage 2/twin tials/close 2,3,4th. SDS EFI tuning always in progress. 500+ HP, BTSOMP Dyno

Last edited by philip j; 11-27-2017 at 01:28 PM..
Old 11-27-2017, 01:03 PM
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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.
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Old 11-27-2017, 01:05 PM
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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]
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Brad...930 gt-1 racecar, increased displacement to 3.6L, JB racing Cylinders, JE 8 to1 pistons, stroked crank, Carrillo rods, extrudehoned 3.2L intake, full bay Bell I/C, GT-2 EVO cams, Rarly8 headers, GTX-35RS turbo, twin plug, P&P heads, Link G4 EFi system, G-50/50 with LTD slip and oil squirters/oil cooler, zork tube, full race coilover system, with carbon fiber body, full cage, E-85 sippin drunk
Old 11-27-2017, 01:20 PM
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using a GM open air for intake temps...

https://www.diyautotune.com/product/gm-open-element-iat-sensor-with-connector/
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87 930 GHL/Rarlyl8 dual/Garretson/GT3582R/1 Bar/Wevo shift, mounts/Meth inj/LC-1/Custom Fuchs/Carrera intake manifold/Xtreme Carrera heads P&P/3.4/DR 993SS cams/ Mahl/Pauter/JE/Niresist/ARP/twin plug coil packs/8.25:1/KEP stage 2/twin tials/close 2,3,4th. SDS EFI tuning always in progress. 500+ HP, BTSOMP Dyno
Old 11-27-2017, 01:23 PM
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I️ have mine located same as Brad with same results, minimal heat soak
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Old 11-27-2017, 04:31 PM
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How about one of these in that silicone elbow?
http://www.siliconeintakes.com/holset-turbocharger/-p-500.html
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Old 11-27-2017, 04:53 PM
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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.
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Old 11-27-2017, 04:54 PM
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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.
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Last edited by dap930; 11-28-2017 at 03:26 PM.. Reason: accidental post before finished
Old 11-28-2017, 03:04 PM
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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
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87 930 GHL/Rarlyl8 dual/Garretson/GT3582R/1 Bar/Wevo shift, mounts/Meth inj/LC-1/Custom Fuchs/Carrera intake manifold/Xtreme Carrera heads P&P/3.4/DR 993SS cams/ Mahl/Pauter/JE/Niresist/ARP/twin plug coil packs/8.25:1/KEP stage 2/twin tials/close 2,3,4th. SDS EFI tuning always in progress. 500+ HP, BTSOMP Dyno
Old 11-28-2017, 04:05 PM
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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!
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87 930 GHL/Rarlyl8 dual/Garretson/GT3582R/1 Bar/Wevo shift, mounts/Meth inj/LC-1/Custom Fuchs/Carrera intake manifold/Xtreme Carrera heads P&P/3.4/DR 993SS cams/ Mahl/Pauter/JE/Niresist/ARP/twin plug coil packs/8.25:1/KEP stage 2/twin tials/close 2,3,4th. SDS EFI tuning always in progress. 500+ HP, BTSOMP Dyno
Old 11-28-2017, 06:15 PM
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