I just installed an AEM cold air on my car. The instructions didnt say anything about removing the undertray. Is there any reason to keep it in there? If I take it out, won't I get better air circulation in the engine bay?

 

No, air flow will be worse, the under tray is there to keep air flowing into the radiator rather than just around it.

 

Why do you think Mazda put a undertray on the car from factory?

 

To help secure and seal the oem intake

 

Ummmmmmmm guys, actually it is practically useless unless you have a factory airbox. It is mostly there to keep heat from the radiator from soaking the bottom of the airbox.

Removing it will improve flow efficiency of the radiator by a small margin. So just remove the damn tray.

 

Honestly, I didn't know. That's why I asked. If I had to guess, though, I would've said it was supporting the airbox since it was (basically) just sitting on top of it.

Besides, not everything that goes on a car has a performance based function.

 

it will improve efficiency of the radiator by a small margin and increase intake temps a bit. its not worth it to remove.

IMHO, buy the discontinued BHR metal tray to make it look pretty, or weld up your own for a fraction of the price.

 

What if I get my hands on a thermal wrap? Wouldn't that solve the issue of increased intake temp?

 

It would help if we where talking about the same under tray I should have read the OP's post and title more carefully. Freaken job, it distracts me from the forum

 

do you want **** coming off the road and smashing into your engine bay?

Mazda didnt put the tray on for a joke and a laugh

edit: lol airbox tray not car undertray lol sorry op i feel bad now

 

BHR tray is nice.....

 

Making your own would be easy. You could do fiberglass, carbon fiber, or metal.

 

The airbox tray is there to insulate the OEM airbox from the radiator heat. If you take it off, be sure to wrap the AEM intake with thermal insulation.

IATs will still rise when idling but will go down immediately and fall quickly at near ambient when you start moving (you can, in addition, fabricate a heat shield that covers the bottom of the intake tube - post pictures).

 

I was going to get wingles bhr tray, but decided to make my own. I LOVE DIY stuff

Would using plastic deform with heat? Like a thick plexi? I dont have access to a welder, would need to flange the edges and make rivets if i used metal.

 

Got a CAI on my car and I removed the whole airbox tray to improve cooling. But I do notice that the intake pipe gets really hot to touch so i plan on wrapping it with some sort of heat wrap. But it didnt really affect my idle.

 

I have an AEM and have the airbox tray removed. I also wrapped the intake in DEI Gold Reflect heat shielding. Intake temps are 6-8 degrees above ambient when moving and the car is completely warmed up. That was before I cut louvers into the hood though, once I'm finished with that we'll see if it gets any better now that all that heat has somewhere to go.

 

^ This is truth...

 

^ I believe it.

 

The truth is that you should read the thread before commenting.

AIRBOX undertray.

 

Still applies to the AIRBOX UNDERTRAY...it is there to funnel air as it passes thru the radiator...removing it will effect the rad temps... so there...

 

It does change radiator temps, yes... It decreases it.