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Cold Air Intake for car

by a_shorething, published

Cold Air Intake for car by a_shorething Oct 26, 2012
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6928Views 1042Downloads Found in Automotive


This is a cold air intake system for any car that has a wide but narrow (top to bottom) area to pull air into the engine compartment. This one is for a Porsche 928.


These three parts are designed to print on a Prusa Mendel vs (hence the corners cut at a 45). You have to put each piece on the bed at a 45 degree angle (rotate 45 in the z-axis and then click 'center object' in Slic3r).

I haven't printed the scoopfront6.stl so I'm not sure it will work OK (My mendel has interference issues at the top of the envelope on one side because it hits the frame). So that part is a work in progress, but the other two pieces came out good.

Here's the way it's set up from back to front:
Scoop3b.stl is the part inside the engine compartment, it connects to a 4"ID flex hose going back to the MAF.
Scoopplate.stl is the plate for the front of the fan shroud so the part bolts in OK.
Alternately you can use Scoopfront6.stl if you can get it to print properly and it would reach forward of the radiator and pull cooler air from out there with the part that extends forward and down.
This will really push the 'envelope' of your printer!

I've sanded and primed the scoop3b.stl part (shown printed in purple here) and I'm going to paint it with a gloss black. I'll post a pic when it's done.

Let me know what you think.

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Hi, is the intent so that you print one set for each side and connect to the original air intake box with the filter? Can these connect to the original hoses or is it a different size?

You make a good point, but if it's much more than 250 deg. F under the hood you probably have other issues. This part is to be mounted just over the radiator which should really never reach 212 (typically 160-190 F and which is of course below 100 deg. C).  PLA doesn't become pliable much below 140 C so I think I should be OK.

I'm going to test it out and see if there are any ill effects with the PLA and then if that's a problem maybe I'll try ABS (which I think is already typically used in 'under-hood' applications).

 Thanks for checking it out!

The large amounts of air rushing through it should keep it relatively cool.

Looks cool, and great use of space on the printbed.  I think I'd be a bit concerned with the operating temperatures in the engine bay.