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Old 08-16-2016, 07:10 PM   #1
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Default Miata Head Flange Drawing

We like to share what we design. This has not been tested yet, but should be shortly. So don't go building it without your own testing.





And the file

http://sadfab.com/opensource.html#headflange

It is 1/2" thick, and built for 1-1/2" schedule 40 pipe.
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Old 08-16-2016, 10:29 PM   #2
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5/8" or bust.
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Old 08-16-2016, 10:40 PM   #3
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1 1/4 or bust.
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Old 08-17-2016, 12:09 AM   #4
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2"
and bust anyway
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Old 08-17-2016, 02:43 AM   #5
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Props awarded, if I get a chance I'll laser the head side out of cardboard to confirm fitment.
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Old 08-17-2016, 09:22 AM   #6
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Looks good. Yours matches my head scan data perfectly.
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Old 08-17-2016, 12:52 PM   #7
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I guess I've been living under a rock. When did 1.5" pipe become the manifold size of choice?
Definitely not a fluids engineer so I won't try and claim one is better than the other, but I'd have to have a good reason to build a manifold with 1.5 instead of 1.25.
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Old 08-17-2016, 12:57 PM   #8
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it's not. use 1.25 like 90% of the rest of us. he has plans for ALLOFIT in 200 years
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Old 08-17-2016, 12:58 PM   #9
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Great question. I used 1.5" sch. 40 because it matched the factory port size when I smooshed it oval with a press. If you're making a fancy flange with a loft between the oval and round cross section, I'd think about doing it for 1.25" pipe too.
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Old 08-17-2016, 03:49 PM   #10
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I used 1.5" because that seems to be the common pipe size. My current manifold is built out of 1.25".

I'll see about getting a 1.25" drawn up. 1.25" shedule 40 is pretty small ID though compared to the ports.

Oh now I remember why 1.5". ACE Race doesn't have 321SS in 1.25 schedule 40.
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Old 08-17-2016, 03:53 PM   #11
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Quote:
Originally Posted by 18psi View Post
it's not. use 1.25 like 90% of the rest of us. he has plans for ALLOFIT in 200 years
Bruh. I bought a turbo and rods.

Like 100 years minimum.
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Old 08-17-2016, 04:12 PM   #12
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deezum's is drawing up a version for 1.25" schedule 40 also if you are so inclined.
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Old 08-17-2016, 04:16 PM   #13
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Aaaand damn that guy works fast.

http://sadfab.com/opensource.html#headflange
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Old 08-17-2016, 04:52 PM   #14
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Nice! Nothing like getting free stuff. Thanks for your time guys!
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Old 08-17-2016, 09:28 PM   #15
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If you use 321 stainless I wouldnt be afraid of sch10.
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