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Different turbo mount 931???

 
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Dutch924-racer  



Joined: 23 Jul 2007
Posts: 1059
Location: The Netherlands

PostPosted: Sun May 24, 2020 2:52 pm    Post subject: Different turbo mount 931??? Reply with quote

I see some difference in turbo mounts(both same partnumber).

Difference is that the main hole is not in the center and the other one has a smaller hole for the oil feed.

Anybody know why?

https://ibb.co/Q8GPxxt
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937 DITC
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Carrera RSR  



Joined: 08 Jan 2010
Posts: 1970
Location: Somerset, UK

PostPosted: Sun May 24, 2020 6:42 pm    Post subject: Reply with quote

Believe mine is on the left....one on the car and spares

Bolt holes on the right look further apart in the pic?
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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
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Mike9311  



Joined: 14 Dec 2004
Posts: 834
Location: Chicago-ish

PostPosted: Sun May 24, 2020 11:57 pm    Post subject: Reply with quote

I have spent wayyyy to much time fondling turbo mounts on my aluminum mount project

I realized all too late a detail. The that hole doesn't line up with the drain on the K26 center section. Its offset one to the other

The simplest solution is to chamfer, or in this case, make that hole larger

It does look like the mount holes are farther apart but it wouldn't surprise me if its just the picture. The one on the left looks like it has larger holes.

Its hard enough to put these on a turbo since it hits the part of the turbo body. Larger mount holes allow more tilt during install. The one I scanned for my mount was notched by the PO

Most, if not all of my iron mounts, look like the one on your left.

The camera is playing tricks here too. This is also an early picture. Once I saw the offset drain, I increased my center hole diameter. I also made cut outs for mounting in the back part (not shown here)


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1980 931 since 1989
1981 Ideola 931 Club Sport
1982 931 Entwicklungsfahrzeug
1979 924 NA M650 Herausnehmbares Dach
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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Dutch924-racer  



Joined: 23 Jul 2007
Posts: 1059
Location: The Netherlands

PostPosted: Mon May 25, 2020 4:44 am    Post subject: Reply with quote

So the left one is the one to use?
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937 trackday car
Series 2 engine
951S turbo and intercooler
937 DITC
Fast road camshaft
Forge recirculation valve + boost controller
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Mike9311  



Joined: 14 Dec 2004
Posts: 834
Location: Chicago-ish

PostPosted: Mon May 25, 2020 8:44 am    Post subject: Reply with quote

I would say yes. The larger hole version seems to be the only ones I have. Found two more

Obviously not holding it perfectly. It was dark




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1980 931 since 1989
1981 Ideola 931 Club Sport
1982 931 Entwicklungsfahrzeug
1979 924 NA M650 Herausnehmbares Dach
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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View user's profile Send private message
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