3D-printed port parts
Flares, a flange and supports for a round port tube — sized from your saved project and fitted to your printer bed. The STL files work in any slicer.
Project
Open a project: the one currently in the calculator, or a saved .json file (calculator → “Export” → “Export project”).
Print settings
Cut list
How to print
- Use PETG or ASA: a car can get hotter than 60 °C (140 °F) in summer, and PLA will warp there.
- 3–4 perimeters, 20–30 % infill, no supports needed: flares print narrow end down, flanges and supports flat side down.
- The pieces of a large flare plug together with pegs and sockets (where the wall is thick enough) and are glued along their cut faces (solvent cement for ABS/ASA, epoxy or CA glue for PETG); sand the seam inside the flare smooth.
- You can print the port tube itself: a long tube is split into pieces that fit your print height, and the pieces slot into each other and are glued. The tube wall is half the difference between the outer and inner diameters; jointed pieces need at least 2 mm.
- The sleeve slips over the tube with room for glue. If it is too tight or too loose, adjust the fit clearance and print again.
- Before printing the whole set, print the template and hold it against the tube to check the outside diameter.
Questions
Do flares change the port tuning?
A little: a flare makes the port acoustically longer, so the tuning drops slightly. The calculator sizes the length as a straight tube and leaves room in the box for flares of the radius set in the project — print that radius, then check the tuning by measurement once the box is built.
Which tube should I use?
Any straight tube with the inside diameter from the project: PVC drain pipe, downspout or a cardboard tube. Enter the outside diameter precisely — the sleeve and the panel hole are sized from it.
The flare doesn’t fit my printer bed — what now?
Enter your bed size: a part wider than the bed is split into 2 or 4 identical pieces. Print each one separately, then glue them together.
Why tube supports?
A long tube held only by the front panel vibrates and can buzz. A support holds its inner end against a wall of the box.