On 3/24/2024, Christopher Rich wrote:
Just want to put this out there:
This is a filler cap I made in Fusion to get more crankcase venting.
I'm including the STL file, but I used Shapeways to make the one I have (cost about $30). I used MJF plastic (description below).
I've not run the car yet, but this version clears the hood easily and would vent to a 3/8" line to a catch can. I hope the opening is wide enough to make a difference.

About MJF Plastic PA12 – 3D Printing Material Multi Jet Fusion (MJF) Plastic PA12 is HP’s nylon plastic with excellent mechanical properties and a slightly grainy finish. In black, it is also available in a smooth and slightly glossy finish. MJF Plastic PA12 is an ideal choice for a wide range of applications from industrial parts to durable end-use goods. Its strength, durability and stiffness make it great for functional parts, such RC car parts and mounts. It is also popular for home decor, eyewear and games. MJF Plastic PA12 is printed using HP’s Multi Jet Fusion technology and supports very complex geometries and thin features.

Click for 35MB *.stl printer file. MGA_filler_cap_v4.stl