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MikeJinCO · Posted: Tue Mar 03, 2015 8:46 am Post subject: 931 exhaust Manifold drawing

I am exploring on using MSDS NA headers on a 931 head. I made a autocad .dfx file and then cut it on my cnc router. The result was the ports fit exactly, but the bolt connections will require some mods. If anyone would like a copy of the file I would be happy to send it to them.

Note that this is not a dimensioned engineering drawing, just a a computer file. I can tell you what dimensions I used. I had to draw it in inches rather than metric as that is what the router understands.
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Mike

'67 MG Midget Dp
'71 Ocelot Dsr Kawasaki 1000(under rebuild)

morghen · Joined: 21 Jan 2005 Posts: 9095 Location: Romania

You have PM.
Thanks !
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Supercharger and EFI kits
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MikeDanger · Joined: 21 Nov 2002 Posts: 774 Location: Denver

FWIW, the 931 (dont know about the NA head)
uses the same flanges most air cooled 911's 66mm bolt center to center.

http://www.spdexhaust.com/pdfs/HeadFlanges/Porsche-911.pdf

http://www.spdexhaust.com/2BoltB.html
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It was either this or a giant box of legos