Hi all,

as everyone already knows the oem IAT sensor reads pretty slow and heat soaks in the oem location...well I Have been wanting to find a better solution to the OEM pos and thanks to another forum I think I may have found a awsome replacement

http://www.compsystems.com.au/Downlo...MR/CSA5ATS.pdf


I will be getting it in a couple of weeks provided its available, the calibration seems to be pretty close to the original so it should be a simpe drop in deal just thought I'd share. once I get a hold of it I will do some tests on reaction times and accuracy vs the OEM and post my findings.

 

Sounds nice.

Another thing I have seen done is reloacting the IAT out from under the UIM and placing it just after the Intercooler exit.

 

yes I am relocating to the stock elbow since its non mettalic and should net the least amount of heat soak but I was also hoping to improve on the unknown variable of the stock sensors slow reaction time.

 

I did a couple of comparisons between a stock sensor and one that I had sanded down the end of to remove the excess plastic around the tip. Chuck I believe had suggested it. Anyway, the response was much much quicker but still not as fast as a true open element sensor. What was interesting was that the stock sensor took around 3-4 minutes to reach its final temperature it was not far off by about a minute into the temeprature change. While the sanded down one took around a minute to completely stabilize being fairly close to a stable reading around 15 seconds. These were doing dunk tests between almost boiling water and ice water. Not real scientific but it did show a difference.

 

Do you have a picture of the sanded down one, just curious how much material was taken off.

 

There is no cheap way to determine that unless the process is done on a few and if the manufactoring process makes each sensor exactly the same .

I carefully sanded the black plastic off the tip and tip sides down about 1/8" untill the color changed due to the sensor being exposed. My sensor color is a semi-translucent beige/brown.

I do try to "push the envelope" on thinking how to make something work better for less.

 

Thanks for the info!

 

I was looking into setting up a LUT for the sensors so you could convert a standard open element GM sensor signal to the output similar to the stock sensor. I just am not that micro gifted and haven't had the time to do it.

 

So Chuck do I understand that you just sanded the last 1/8th of an inch of the tip, or further down the side?

 

Any updates on that sensor you were going to check out. I have been logging my GM AIT sensors compared to a sanded down stock sensor in the Greddy elbow. It is rediculous the amount of difference in change from the start of a WOT run to the end. OEM doesn't move but a few degrees C.

 

Ugh....unfortunantley no. I have gotten swamped down at work and haven't had a chance to get this going yet. hopefully soon I will be able to get back to it.

 

Hey chuck,
Did you notice much difference after doing this? Response, heat soak, sensor reaction time etc. ?
-J

 

I did before and after comparisons using both hot and cold water, but this was a few years ago. I no longer have the original recorded results. Probably buried in some old thread. I searched on IAT and threads I started, but did not find it.

YES, it is faster and less heat soak when placed in the outlet pipe of my FMIC.

 

Here are two different sensors I had cut down. The one with less material removed did not react much faster. The other with much less did material I tried this weekend and it did change temperature much faster. What was interesting was that before my temperature would change maybe a 1-2 degree during a 2 and 3 gear run and would continue to go up after the run for a while. When I logged the sensor with the bead showing it actually change temperature during the run a total of 10 deg C. The temperature was still going up a deg or two after the throttle was closed though, assuming heatsoak. Sensor is in the Greddy elbow.

 

Back from the dead. Any new information? I want to use a new sensor with my new intake manifold I'm building. I'll be done with it in a couple of weeks...