On the DATALOGIT YAHOO Group, I have added a file about my testing of the Delphi (GM) air temp sensor.

If you have a DATALOGIT, then you could use this non Mazda sensor but would have to AFR test winter, spring, and summer to figure the reset values for the INJ vs. AT map.

 

I saw all the results for the Delphi, but how about the GM? Did the GM react as fast? Was the scale on the GM closer to stock?

 

A friend has the GM. It looks exactly like the Delphi and the resistance is really the same given the % of accuracy of these low cost thermistors.

 

Hi Chuck,

I read your test results on the Datalogit group site. First of all thanks for running these tests and sharing the results.

Do you feel that since the Delphi sensor malfunctioned during your high temp test that it is not a good choice for use on the FD?

I am currently using the stock sensor which I have relocated to a position close to the outlet of my custom SMIC. I believe that you are running a somewhat similar configuration with the stock sensor repositioned near the outlet of your FMIC. Do you believe there is any benefit of the Delphi over the stock in these setups?

Thanks again,
Ray

 

According to Delphi specs, their sensor should work up to a maximum of 125C. My 77C(170F) was nowhere close, so why did the resitance go up? Was it a bad sensor or accelerated aging? I think accelerated aging
due to non natural accelerated temperature heating.

Given the temps near the IC outlet (mine in on the ic outlet pipe) it should never exceed 50C. Thus with the parallel resitor, if you tune your AFRs correctly at one of the three points(high, medium, or low). then retest for the other two points, and adjust the INJ vs. Air Temp map to correct fuel; all should be OK. Even with my stock relocated sensor, I have had to redo my I vs AT map t keep AFRs where I want them.

The Delphi/GM does respond much faster and will keep AFRs more consistant and accurate.


I have modded my stock sensor as posted to slightly increase it's responce.

 

Delphi (formerly Delco) makes GM electronics so they're probably the same.

Jack