TJ Exhaust Manifold Design

Mrmassdestruction

Member
Original poster
Joined
May 9, 2023
Messages
29
Location
Las Vegas, Nevada
Hey guys, I haven't been working on my jeep lately but recently I've been messing around with Autodesk Fusion. I'm trying to make a header design similar to the American Racing Headers one. I already designed a 6 to 1 merge collector but I'm not sure if I have my manifold reference scaled proportionally. Does anyone have dimensions of the cylinder head ports, or even the dimensions of the manifold gasket? I wish we had access to some technical drawings.

This probably isn't going to be built as I have zero experience welding (although it's something I would like to learn at some point), it's more of an engineering project just for fun. However, after I installed my turbo kit, I'm having some interference between my exhaust and the front driveshaft (I already tried prying at it while loosening and tightening the pre-cat flanges to no avail).

This is nothing serious and is just for fun, but I thought I would reach out and see if anyone has any information.

Screenshot 2024-12-04 120310.png
 
Hey guys, I haven't been working on my jeep lately but recently I've been messing around with Autodesk Fusion. I'm trying to make a header design similar to the American Racing Headers one. I already designed a 6 to 1 merge collector but I'm not sure if I have my manifold reference scaled proportionally. Does anyone have dimensions of the cylinder head ports, or even the dimensions of the manifold gasket? I wish we had access to some technical drawings.

This probably isn't going to be built as I have zero experience welding (although it's something I would like to learn at some point), it's more of an engineering project just for fun. However, after I installed my turbo kit, I'm having some interference between my exhaust and the front driveshaft (I already tried prying at it while loosening and tightening the pre-cat flanges to no avail).

This is nothing serious and is just for fun, but I thought I would reach out and see if anyone has any information.

View attachment 577065

Just using AI, it says the port diameter is about 1.375"(34.93mm) and the spacing between them is 3.75"(92.25mm). Not too sure how accurate it is. If you have the exhaust manifold off your jeep, you could even maybe use one of those 3d scanner apps and import it as an .stl and model off the face? Just tossing some ideas out there