So I've seen multiple posts in forums online about the airbox being restrictive and people cut a hole in it, usually very sloppily, and they claim to get a little boost in fuel economy and smoother acceleration. I hadn't done it yet because it seems to me that I'd just be sucking hot under hood air in.
So, I made a little duct to get past the hot under hood air and get cool fresh air from the outside.
It's was a cool CAD project because of the funny shape hole that I made and the fact that I had to follow one of the ribs down on the outside so I did not have a 90% corner. Also I added ribs to the inside of it to give it more rigidity since the walls are thin, 2mm. It took 7.5 hours to print since I used ASA for strength and heat resistance and slowed the print head way down to get better layer line adhesion. I also printed it laying down so there was a whole damn forest of tree supports!!
I made my hole more neatly than others I've seen
The Part
Brought it into the box like the factory one
Bridging the gap to get out of the hot engine bay
Sticks out right behind the headlight
So I've seen multiple posts in forums online about the [airbox](https://poal.co/static/images/d9e9696913a60c99.jpg) being restrictive and people cut a hole in it, usually very sloppily, and they claim to get a little boost in fuel economy and smoother acceleration. I hadn't done it yet because it seems to me that I'd just be sucking hot under hood air in.
So, I made a little duct to get past the hot under hood air and get cool fresh air from the outside.
It's was a cool CAD project because of the funny shape hole that I made and the fact that I had to follow one of the ribs down on the outside so I did not have a 90% corner. Also I added ribs to the inside of it to give it more rigidity since the walls are thin, 2mm. It took 7.5 hours to print since I used ASA for strength and heat resistance and slowed the print head way down to get better layer line adhesion. I also printed it laying down so there was a whole damn forest of tree supports!!
[I made my hole more neatly than others I've seen](https://poal.co/static/images/61011313c38f9e3e.jpg)
[The Part](https://poal.co/static/images/3e87e6c5c7c7475f.jpg)
[Brought it into the box like the factory one](https://poal.co/static/images/2f2b7323687c7bd6.jpg)
[Bridging the gap to get out of the hot engine bay](https://poal.co/static/images/89783711b1b4b664.jpg)
[Sticks out right behind the headlight](https://poal.co/static/images/6c6c752d6f777644.jpg)
