I run mine 10" from the IC, this keeps the sensor cool, unlike up top by the TB where it heats up and give inaccurate readings.

 

I don't like the idea of using the fuel temp sensor so I think I'm going to end up using the AIT sensor. To me it just makes more sense. Maybe if I was in an area where the temperature outside stayed relatively the same it would be a different story. But for my needs I think a GM AIT sensor will work just fine. I can always change it down the road if need be.


Thanks for all the responses guys, I really do appreciate the help and advice from everyone on here

 

I was going to run mine on the intake manifold but I may just switch it up and put it on the UICP instead.. makes more sense.

 

+1

 

+2

 

How would I know if mine is getting heat soaked? It is currently about 4-6" from the TB in Aluminum piping. Any inconsistent fueling issues Ive had are so minor that Ive either ignored it or just wrote it off as something I still need to address in the tune.

 

If you are going to run ait sensor then yeah further away from intake mani is best I would think.

 

Did you switch to sd mrfred?

My vipec has a iat temp sensor that mounts to he manifold. It's slightly different than the gmiat that everyone uses though. I have one of those as well and STM welded the bung just as the uicp turns upward from the ic.

 

Anybody know how to wire this up? A detailed description or a diagram perhaps? I've been searching but can't find a solid answer.

I will be using an Omni 4 bar, gm ait and stock ecu ..


EDIT: Nevermind, I just found a Speed Density Adapter Harness on Spoolinup's site.

 

I like having a real air flow measurement, and my car runs perfect on MAF, so its still on MAF, but I have a IAT sensor installed in the UICP and could switch any time. I'll eventually give SD a try after I am done with the major power mods.

 

Gotcha, I did go back to maf myself for the stock ecu. Fudging values prevents me from sleeping. I'd go blow thru if I could with the vipec using a subie maf..

 

Hmm, is the subie maf designed to be used in blow-through? I guess I mean, is that how they are used stock?
Everytime I've looked under the hood of a subie I can't stand it - too much stuff crammed into too small a space. So what I've gathered about them so far is near 0.

 

I did the same, Spoolinup's has a great price and it's a clean install.

 

Here's what throws me about using an IAT sensor for speed density tuning. They are slow. They are even slower than I thought. Here's the spec for the AEM 30-2010 sensor:

Thermal Time Constant: < 15 sec. The time required for the sensor to achieve 63.2% of its steady state value when subjected to a step change in ambient temperature [Tc=(Tf-Ti)*63.2%+Ti]. Test medium: silicone oil

So if you are expecting that the IAT sensor will be giving you the right value for your current operating conditions, no, it will give you the right value for where you were several seconds ago. That's not so good. In the AEM test they are in silicone oil. Response would probably be even slower in air.

This makes me think maybe Aaron is right about getting the IAT some other way.
But, I've never had an IAT sensor, have never logged one. So I'm a little bit lacking in complete data here.

 

I wonder about the vipec sensor .. It's different than the gm. Also Subaru uses a different mat sensor too