Are these headers cast or some other form of manufacture? The rim along the edge makes it look like a sheet-metal clam.
Are these headers cast or some other form of manufacture? The rim along the edge makes it look like a sheet-metal clam.
I think it's a sheet metal heat shield formed over tubular headers.
In reply to PMRacing :
I am inclined to agree, but there is a slim possibility it could be SLS 3D printed sintered metal. Something about the surface appearance makes me think that for some reason
I was also thinking sintered, printed 3D metal.
If you look at the left side of the picture you can see 4 tubes coming out of the shield (and 2 O2 bungs). Also there are some screws between the cylinders near the head to hold the halves together. I could be wrong though. I didn't go to the original thread....
I'll bet it's a stamped sheetmetal cover. 3D printing makes no sense in a production environment, and even Ferrari production is mass production.
I wonder what the material is.
Stamped 304 Stainless heat shield. 2-piece.
Note how the primaries are oriented (stacked in diamond shape) so there is no undercut in the press tooling.
Early '60s Mini Cooper OEM header was same construction .... but the actual header. No heat shield.
Keep in mind that is an F40 Engine so 3D printing was not an option back when it was produced.
It is a heat shield. This giveaway is the rivets holding the two halves to each other
Thank you GRM.
Nice piece of stamping I must say,
Thank you GRM.
Nice piece of stamping I must say,
.... prolly retaining heat to make the catalytic converter light off quicker to meet emissions test. Or shielding other components ...
The guy I rent shop space with has an F355 that has a similar design. They're tubular headers with heat shields. Evidently the problem is the headers deteriorate and the engine sucks material back into the cylinders and destroys valves. Enough of a problem that 'rebuilding' your headers is standard practice.
OzRaceFan said:.... prolly retaining heat to make the catalytic converter light off quicker to meet emissions test. Or shielding other components ...
It's to keep other things cool. Doesn't change cat light off at all. We tried some super high tech dual wall headers, but switched back to cast iron with better flow.
As for making these at home, seems that one can print a mold and then form around it. It would be a lot of high density plastic, but it's possible.
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