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Air Intake Temp Sensor + gauge?

 
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MikeDanger  



Joined: 21 Nov 2002
Posts: 636
Location: Denver

PostPosted: Fri Mar 12, 2021 11:46 am    Post subject: Air Intake Temp Sensor + gauge? Reply with quote

Does anyone know if the AIT sensor near the throttle can be wires to gauge to get readings?


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Carrera RSR  



Joined: 08 Jan 2010
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Location: Somerset, UK

PostPosted: Fri Mar 12, 2021 5:01 pm    Post subject: Reply with quote

I just put a modern sensor in that spot which I knew would work accurately with the gauge.
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MikeDanger  



Joined: 21 Nov 2002
Posts: 636
Location: Denver

PostPosted: Fri Mar 12, 2021 6:06 pm    Post subject: Reply with quote

Carrera RSR wrote:
I just put a modern sensor in that spot which I knew would work accurately with the gauge.


what thread is that? and what about the factory wiring, what did you do about that?
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morghen  



Joined: 21 Jan 2005
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PostPosted: Fri Mar 12, 2021 6:50 pm    Post subject: Reply with quote

Why would you want such a gauge?
Realistically speaking, what do you think it will serve you achieve?
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Carrera RSR  



Joined: 08 Jan 2010
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Location: Somerset, UK

PostPosted: Fri Mar 12, 2021 6:53 pm    Post subject: Reply with quote

MikeDanger wrote:
Carrera RSR wrote:
I just put a modern sensor in that spot which I knew would work accurately with the gauge.


what thread is that? and what about the factory wiring, what did you do about that?


Don't recall. I just re tapped it to standard 1/8 NPT as thats the most popular sensor thread.

There was no factory wiring to worry about on S1 RoW car. The S1 TB was swapped out to S2 version when building and modifying the engine + intakes
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CÚdric  



Joined: 27 Aug 2004
Posts: 2114
Location: Sweden

PostPosted: Fri Mar 12, 2021 7:01 pm    Post subject: Reply with quote

I thought about doing it, should be a fairly reasonable process. But you need to have a pull up resistor to get the voltages to get in the correct range (0-5v like most loggers have), and use the characterisation for the sensor. But for a non configurable stand alone guage a new sensor has to be fitted.
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Rasta Monsta  



Joined: 12 Jul 2006
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PostPosted: Sat Mar 13, 2021 12:28 am    Post subject: Reply with quote

morghen wrote:
Why would you want such a gauge?


Good way to check intercooler efficiency....
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924RACR  



Joined: 29 Jul 2001
Posts: 8422
Location: Royal Oak, MI, USA

PostPosted: Sat Mar 13, 2021 1:15 am    Post subject: Reply with quote

As noted elsewhere, better to use a temp sensor installed on the charge tubes, not the intake, due to heat soak.

When I MS'd my car, I tried to use the stock sensor. After much frustration, I came to the conclusion it was not functional! Might in part relate to some of my running issues.

So I'd be disinclined to try to use the original sensor, or that location. I left mine in to plug the hole, and welded a new NPT bung for a modern sensor on the charge tube after the IC.

Maybe some day I'll get around to putting a sensor before the IC too. Though right now, I first have to get a working starter in my car (the fancy aftermarket gear reduction one died from sitting in my driveway all winter) and replace the piston rings... yay.
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Carrera RSR  



Joined: 08 Jan 2010
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PostPosted: Sat Mar 13, 2021 2:26 am    Post subject: Reply with quote

924RACR wrote:
As noted elsewhere, better to use a temp sensor installed on the charge tubes, not the intake, due to heat soak.

When I MS'd my car, I tried to use the stock sensor. After much frustration, I came to the conclusion it was not functional! Might in part relate to some of my running issues.

So I'd be disinclined to try to use the original sensor, or that location. I left mine in to plug the hole, and welded a new NPT bung for a modern sensor on the charge tube after the IC.

Maybe some day I'll get around to putting a sensor before the IC too. Though right now, I first have to get a working starter in my car (the fancy aftermarket gear reduction one died from sitting in my driveway all winter) and replace the piston rings... yay.


Yes, the OEM TB location does heat soak when throttle is closed......but does register the correct temp as soon as reopened....... AIT is mostly critical when throttle is open and on boost anyhow.
Agree boost tube is best....but that hole in the TB was easier to use. I have too much junk on the boost tube already
AIT post IC is more critical than pre. But still nice to know if that IC is doing its job
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MikeDanger  



Joined: 21 Nov 2002
Posts: 636
Location: Denver

PostPosted: Sat Mar 13, 2021 6:26 am    Post subject: Reply with quote

as for Pre- wouldn;t it be just about the same to use a simple Outside Air temp gauge?
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Carrera RSR  



Joined: 08 Jan 2010
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PostPosted: Sat Mar 13, 2021 9:08 am    Post subject: Reply with quote

MikeDanger wrote:
as for Pre- wouldn;t it be just about the same to use a simple Outside Air temp gauge?


How? Why?

Air temp post turbo is way higher than ambient air temp. You also need the same AIT sensor pre IC as post to run a gauge.
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MikeDanger  



Joined: 21 Nov 2002
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Location: Denver

PostPosted: Sat Mar 13, 2021 12:33 pm    Post subject: Reply with quote

Sorry I read that wrong. thought you were taking about turbo inlet temp, Not intercooler.
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924RACR  



Joined: 29 Jul 2001
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PostPosted: Sat Mar 13, 2021 9:59 pm    Post subject: Reply with quote

Dug it out and measured; thread is M14 x 1.5
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