blackandtan22

What kind of intake temps are you all seeing in N/A applications compared to ambient temperature? I am trying to see how I am doing with my attempt at a CAI.

hornetball

iTrader: (4)

When moving . . . ambient.

blackandtan22

I'm not even close to that. Could you post pics of your CAI?

hornetball

iTrader: (4)

https://www.miataturbo.net/build-thr...7/#post1129353

Note that my IAT sensor is located in the cold air box.

blackandtan22

Here is a pic of mine. I have since added some insulation inside of the box and wrapped the intake pipe in radiant barrier. I am seeing roughly 15 degrees higher than ambient.

concealer404

iTrader: (3)

Probably heatsoak of the sensor.

blackandtan22

Is there really anything I can do about heat soak of the sensor if it is that?

concealer404

iTrader: (3)

Sure, move the sensor. Or insulate it.

For that matter, i notice you have a metric shitload of wiring for that sensor just chilling out near the exhaust manifold.

Have you checked calibration of that thing?

blackandtan22

Perhaps I am mistaken but thought was told with my Megasquirt I just had to chose GM IAT and all would be calibrated correctly.

I'll look at insulating it better. Thanks.

concealer404

iTrader: (3)

Sure. Double check. How do you know if your sensor is accurate?

Does it match ambient when the car is cold and not running?

blackandtan22

Yes before starting it is roughly at ambient. Just put some thermal barrier around the sensor. Hopefully that helps a bit.

asmasm

iTrader: (1)

2-5F over ambient. No heat soak or hot restart issues. I do my testing by getting the car fully hot and the letting it sit with the hood closed for ~20 minutes so everything heat soaks. Then driving on the highway to see how close the intake temp will get to ambient.

Putting the IAT sensor outside the engine bay helps a lot with sensor heat soak issues.