I am looking for a IAT to use with my EBL. #1 seems to be the proper one due to its quicker reaction time. #2 uses a solid brass tip and would be slower with reaction time. Which is more important reaction time or accuracy? It would seem to me that the temperature of the flowing air would not change dramatically over a short period of time and once the tip is heat soaked the accuracy would be the important factor.


#1 - GM Open Element IAT Sensor with Pigtail

#2 - GM Closed Element CLT / IAT Sensor with Pigtail

 

Either will work just fine.
The IA Temp.s just don't change that fast, in a N/A application. *Some* turbo stuff can generate issues, but that's basially a special case. A couple degrees is also, not going to be that big of deal. Knowing if the IA temp is 30dF or 140dF is a big deal, but once your close, you're close.

 

It has been my experience that even with a relocated MAT/IAT on a NA engine that during a 1/4 mile run, the MAT/IAT does not reduce a significant amount. A few degrees but not a lot to make a difference IMO. I have reviewed this on a graph from a few read-outs from my scan tool.

My MAT/IAT is fairly quick reacting too. It can detect a couple of degrees of change when travelling down a mountain road on a summer day and I hit a shady spot.

Only when the temperature varies at least 10* (and more like 20*) that I even notice a difference in the PW of the Injectors.

 

Thanks for the input. FWIW - In AZ the temps don't vary all that much. I have a 84 Corvette with dual TBs and I was thinking of mounting the IAT in the air cleaner between both TBs provided there won't be any interference with the linkage.

 

It's kinda hard to keep things out of the cross bar....
Anywhere, within the housing is gonna work.

 

so the moral of this story is that its just better to have an IAT sensor, reguardless of how fast it reads, than to not have one at all?

on that #1 sensor the black wire would go to ground, and does the other just to straight to the EBL?

thanks.

 

Yes,
and
Yes.

 

I believe that to be true. And more so when the intake air temperature is not controlled with pre-heat and water jackets (such as stock GM stuff).

Yes to the wiring. The ground should be picked up from the CTS/TPS ground (not the MAP). The colors are just to keep things straight, there is no polarity to the sensor. So either way would actually work.

RBob.

 

thanks grumpy and rbob. i'll get one of those one of these days.

 

It just so happens I found a CTS sensor (#2) and I will use that one.