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-   -   Fast reacting IAT sensor replaces stock sensor (https://rotarycarclub.com/showthread.php?t=8381)

TitaniumTT 09-20-2009 09:59 PM

I'm in....... for two actually. However, I have two concerns.

1) I'm running a Motec and need to know the calibration "scales" if you will. Is this a standard Bosch type sensor or what other details can you provide for me.

2) I'd be using it pre-intercooler to monitor charge temps, what is the max temp these can endure. We were afraid about melting plastic so we decided to use a coolant temp probe at first, as you can imagine, the response is abysmal. The datalogs show temp increases when in decel :lol:

dudemaaan 09-21-2009 02:36 AM

I'll try to answer the questions as best I can, and if need be I can do some testing to help fully answer them.

I'm not familiar with motec and the calibrations used. If it helps, the calibrations would be exactly the same as the stock FD iat sensor. I did list the resistance values at 20*c and 80*c earlier in the thread I don't know if that tells you anything or not but here they are.

Tested @68 *F (20c) = 2.27 Ohms
Tested @176*F (80c) = 0.34 Ohms

Given the information in those tests I don't think the temperature will accurately read past 200*F because the resistance will have reached 0 ohms. I think the probe can handle higher temperatures but just don't have the resolution needed to go that high.

The sensor is made by sagem for triumph motorcycles, it does uses a common bosch connector, but I'm not sure if bosch makes any identical sensors or not. I couldn't find any.

What are your pre intercooler temps? I know turbo's are capable of outlet temps over 300*F, but if yours are under 200* F it would probably work fine. Otherwise maybe a fast reacting EGT type probe would work, I'm not sure how accurate they are at temperatures that low is the only issue. Let me know if you have more questions I can help with.

FC3S Murray 09-22-2009 12:30 PM

Sensor works GREAT! Easy install and man does it live up to it's name. The sensor after a good heat soak @ 45*C dropped to 36*C in a matter of 45 seconds of driving and by 2 minutes it was back down to 27*C.

Makes tuning my Air Temp-to-Fuel Inj table so much easier.

dudemaaan 09-22-2009 12:47 PM

Great! Glad more people are getting these hooked up, it really is a must have IMO. Did you mount it in the stock location?

Signal 2 09-22-2009 08:22 PM

I just scanned this thread from the beginning so I might have missed it, but how will the open element style sensors perform long term? Especially with an FD that typically has varying amounts of oil blow-by in the intake tract.
My OEM IAT is already relocated and easy to access, so if it's just a matter of using some contact cleaner on it periodically, then it wouldn't be a big deal. But still curious and maybe something others should consider who still have it in the stock location.

dudemaaan 09-22-2009 09:18 PM

The sensing probe has a protective coating over it so oil residue or methanol etc shoudn't have any effect on it. The only thing that could ever be issue is if something sharp or hard like a rock hit the probe, but in that case you would have much bigger issues then the sensor.

TitaniumTT 09-23-2009 01:45 AM

Quote:

Originally Posted by dudemaaan (Post 97476)
The only thing that could ever be issue is if something sharp or hard like a rock hit the probe, but in that case you would have much bigger issues then the sensor.

:rofl: Thanks for the quick response. I'm going to call Motec and see if they have a calibration table for it and what they expect the thing to live up to as far as temps. Thanks again.

Garfinkles Motor Works 09-23-2009 04:40 AM

I pulled my sensor out and clocked it so the moving air will be directed through the cage. Every detail helps. Thanks Dude for the research time.

dudemaaan 09-23-2009 05:04 AM

No problem. Did you notice any difference in reaction time after rotating it a bit?

Garfinkles Motor Works 09-23-2009 07:39 PM

I will drive it to the crusein Friday if it does not rain,I will see then .

dudemaaan 10-04-2009 11:20 AM

FearNoPiston posted a video on the other forum of him boosting with the new sensor installed, It's kinda blurry but you can get an idea of how fast the sensor reacts. The last number is IAT's. It starts at 36*c and drops to 30*c in 6 seconds and holds steady.

http://www.youtube.com/watch?v=qaLkVyZlNDw

Gomez 10-11-2009 05:44 PM

Jeezuz Brent, seems the Aussies on FDRX7.com have taken to your sensor!!

Got any left??!!

dudemaaan 10-11-2009 06:29 PM

haha yeah still have a few over here. no one has sent a payment yet, but they do seem to be interested. That's good though, they really make a big difference in keeping an eye on air temps. Everyone should have 1!

HDP 10-14-2009 11:46 AM

Quote:

Originally Posted by dudemaaan (Post 99233)
haha yeah still have a few over here. no one has sent a payment yet, but they do seem to be interested. That's good though, they really make a big difference in keeping an eye on air temps. Everyone should have 1!

I'm still waiting on the info you were getting on the connectors...

dudemaaan 10-14-2009 12:57 PM

Quote:

Originally Posted by HDP (Post 99436)
I'm still waiting on the info you were getting on the connectors...

Well I did find something very interesting. The connector from a Greddy Boost control solenoid fit's perfectly in the stock connector. If we can source those connectors then a pigtail could be made that plugs right in. Alternatively It looks like a small terminal blade connector, or computer pin could be pushed into the stock connector. Something like this. (red)

http://i10.photobucket.com/albums/a1...e_Terminal.jpg


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