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Rasta Monsta
Joined: 12 Jul 2006 Posts: 11724 Location: PacNW
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Posted: Fri Apr 14, 2017 12:47 am Post subject: Exact OD of 931 Down Pipe |
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Por favor. Gracias. _________________ Toofah King Bad
- WeiBe (1987 924S 2.5t) - 931 S3
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Mike9311
Joined: 14 Dec 2004 Posts: 1678 Location: Chicago-ish
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Posted: Sat Apr 15, 2017 11:59 pm Post subject: |
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Rasta
If nobody answers this before me, I''ll get it measured. A 931 is on the lift plus I have a few downpipes lying around. One of the very reasons its on the lift is do redo the downpipe and exhaust. _________________ 1980 931 since 1989
1981 Ideola 931 Club Sport
1982 931 Entwicklungsfahrzeug
1979 924 NA ohne 650 mit 471
1982 931 Red Resurrection - 951 IC
1982 931 parts car / resurrection?
1980 924 NA (R&D lightweight)
1982 931 wana-be GTR race car |
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Carrera RSR
Joined: 08 Jan 2010 Posts: 2309 Location: Somerset, UK
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Posted: Sun Apr 16, 2017 1:06 am Post subject: |
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Assume you mean the front pipe coming off the turbo? 60mm _________________ 1980 931 - forged pistons, Piper cam, K27/26 3257 6.10 hybrid turbo, 951 FMIC, custom intake, Mittelmotor dizzy & cam pulley, H&S exhaust, GAZ Gold, Fuch'ed, Quaife
Now www.924board.org/viewtopic.php?t=34690
Then www.924board.org/viewtopic.php?t=31252 |
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Mike9311
Joined: 14 Dec 2004 Posts: 1678 Location: Chicago-ish
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Posted: Sun Apr 16, 2017 2:18 am Post subject: |
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Carrera RSR wrote: | Assume you mean the front pipe coming off the turbo? 60mm |
...and that is a kooky number for what we have access to over here. 2.36"
57mm is basically 2.25" so at our 2.5", easy to get tube, we are at 63.5mm and 3" is 76.2
Its harder to get 2.75" _________________ 1980 931 since 1989
1981 Ideola 931 Club Sport
1982 931 Entwicklungsfahrzeug
1979 924 NA ohne 650 mit 471
1982 931 Red Resurrection - 951 IC
1982 931 parts car / resurrection?
1980 924 NA (R&D lightweight)
1982 931 wana-be GTR race car |
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morghen
Joined: 21 Jan 2005 Posts: 8884 Location: Romania
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Posted: Sun Apr 16, 2017 3:08 am Post subject: |
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Inches seems like a scale for agricultural applications
Non metric stuff is silly....you can count all of those 60mm if you want to..but how will you count the 2.36 inches? _________________ https://www.the924.com |
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Rasta Monsta
Joined: 12 Jul 2006 Posts: 11724 Location: PacNW
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Posted: Sun Apr 16, 2017 3:45 am Post subject: |
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I've been fighting the connection between the downpipe and the rest of the system ever since I got this car. There is a "slip fit" there now, with a clamp on it, but it's loose.
Suggestions welcomed. I've been browsing some racey clamp setups, etc, trying to find a good solution. _________________ Toofah King Bad
- WeiBe (1987 924S 2.5t) - 931 S3
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Mike9311
Joined: 14 Dec 2004 Posts: 1678 Location: Chicago-ish
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Posted: Sun Apr 16, 2017 5:33 am Post subject: |
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Morghen- We are stuck with non metric even though I like working in both. Maybe its because I have to most of the time. If we get speed limits here in kph they will just lower the speed limit. For that reason I'll stay non for now
Rasta - why not try something like this? Just v-flange and call it a day Edit: Cheap ebay OBX or other works just fine but personally I like the ones that have a pilot lip. It centers everything and it seals up nice
I made this for an experimental exhaust for my BMW.
_________________ 1980 931 since 1989
1981 Ideola 931 Club Sport
1982 931 Entwicklungsfahrzeug
1979 924 NA ohne 650 mit 471
1982 931 Red Resurrection - 951 IC
1982 931 parts car / resurrection?
1980 924 NA (R&D lightweight)
1982 931 wana-be GTR race car |
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WEASEL149
Joined: 19 Aug 2005 Posts: 595 Location: UK, Sheffield
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Posted: Sun Apr 16, 2017 5:48 am Post subject: |
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morghen wrote: | Inches seems like a scale for agricultural applications
Non metric stuff is silly....you can count all of those 60mm if you want to..but how will you count the 2.36 inches? |
I constantly have to convert from metric to imperial/inch and vice versa. Units are just units after all.
Counting 2.36" reasonably accurately, just use thousandths@2360. _________________ 1979 UK 932 |
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Kenodog
Joined: 25 Jun 2003 Posts: 2651 Location: Vancouver,B.C.
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Posted: Sun Apr 16, 2017 7:32 am Post subject: |
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Ridiculously simple fix. Have a machine shop turn a step spacer from 60mm to 2.5" nominal. Tig weld the spacer to some 2.5" pipe and away you go. In the future all necessary bits will be common to N. America 2.5" stuff.
Me _________________ 1979 Euro 931, Olive
1981 931, Sabine
1991 Ford Ranger XLT 4x4, Ricky
1996 Ford E-350 ex-FedEx Van
2014 Mazda CX-5 (Kinderwagon)
2019 KTM 790 Adventure
2024 KLX300
2024 KLX140 |
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Carrera RSR
Joined: 08 Jan 2010 Posts: 2309 Location: Somerset, UK
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Posted: Sun Apr 16, 2017 7:53 am Post subject: |
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Rasta Monsta wrote: | I've been fighting the connection between the downpipe and the rest of the system ever since I got this car. There is a "slip fit" there now, with a clamp on it, but it's loose.
Suggestions welcomed. I've been browsing some racey clamp setups, etc, trying to find a good solution. |
Never had an issue with my slip joint. Snug fit and coated with loctite high temp gasket sealant.
https://www.flickr.com/photos/16693103@N03/8321038043/in/album-72157629431377585/
PS this set up has been made redundant by a custom front section _________________ 1980 931 - forged pistons, Piper cam, K27/26 3257 6.10 hybrid turbo, 951 FMIC, custom intake, Mittelmotor dizzy & cam pulley, H&S exhaust, GAZ Gold, Fuch'ed, Quaife
Now www.924board.org/viewtopic.php?t=34690
Then www.924board.org/viewtopic.php?t=31252 |
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