Intake air temperatures on NA Miata

[turbogrill]

Hi,

 

I have a short elbow from the TB to where the right headlight usually is.  No extra vents/holes in hood and the bumer is stock with head lights covered. (Headlight mechanism is gone but the hood is covered).

 

Today it was ~90-95F outside and I got the following IATs:

Car warm but off: 113 F (Pure heat soak I guess)

Car running: 127 F 

 

So a little more than 30F difference from ambient car.

Is this normal? What IATs do you see? 

[Chappy]

I’ve got a similar setup to what you describe.  Had a test day at NCM a couple weeks ago, 95 outside, my inlet temps were 103.  
 

Where is your IAT located?  Do you have turn signals still installed?  I have mine removed from the bumper which helps get fresh air in to the filter.  

[Gkuhn41]

Our Mercedes has a similar setup elbow to the headlight area. We built a small box around it and reflective taped the elbow. We have a direct opening to the headlight that is removed. 2"x6" or so. we see around a +5-10* rise in ambient on hot days. Our temp sensor is 1/2 way to the TB.

[turbogrill]

Thanks everyone!

I will open up some holes and see if I can box it off a little.

[Chappy]

Pic shows what I’m running.  I haven’t cut/opened/enclosed anything underhood. Filter sits right under the pass side headlight cover.  

[turbogrill]

On 9/12/2022 at 12:29 PM, Chappy said:

Pic shows what I’m running.  I haven’t cut/opened/enclosed anything underhood. Filter sits right under the pass side headlight cover.  

 

Thanks!

 

Where do the air go on Miatas? Under the car?

[JDChristianson]

3 hours ago, turbogrill said:

 

Thanks!

 

Where do the air go on Miatas? Under the car?

Yes, unless you vent the hood.   We have vents right after the radiator, and up the sides.   Ours are very much DIY Champcar style but similar to these fancy ones.