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931 Tech To do list
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CÚdric  



Joined: 27 Aug 2004
Posts: 1915
Location: Sweden

PostPosted: Sat Jan 11, 2020 6:44 am    Post subject: Reply with quote

Yeah its a good idea. Im thinking of changing to a better oil separator than the stock one to keep the oil amounts out of the intercooler, or a second one as you thinking about. Oil mist in the air lowers octane aswell
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MOTANUL  



Joined: 19 Nov 2018
Posts: 99
Location: ROMANIA BUCHAREST

PostPosted: Sun Jan 12, 2020 2:10 am    Post subject: Reply with quote

From what I checked in my car the original one does not really do a good job.
It almost does not retain oil at all. Just split it

If I think better I put a performance instead of the original. (it is redundant to keep both)

No oil in intercooler and air filter
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1980 Porsche 924 Turbo (931) diamond silver metallic/helios blue metallic
sold Porsche 924 NA 1979
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CÚdric  



Joined: 27 Aug 2004
Posts: 1915
Location: Sweden

PostPosted: Sun Jan 12, 2020 2:25 am    Post subject: Reply with quote

Yeah, its mostly a empty can, and only take biggest particles /sone fluid oil. Many bling aftermarket products are not better though.

I might try a man hummel provent 200 that i might get my hands on, which should be waaay better than the std one. Its a bit clumsy though, a 150 would be better.

I work at a world leading company on this subject with active separators (oil driven mostly) for heavy duty vehicles as a responsible for separation performance development. So i have some knowledge on the subject
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Carrera RSR  



Joined: 08 Jan 2010
Posts: 1865
Location: Somerset, UK

PostPosted: Sun Jan 12, 2020 8:07 am    Post subject: Reply with quote

My aftermarket can which vents to atmosphere has mostly worked well. It used to have a cheap K&N style paper/gauze filter on top and it spat oil and mist over the left side engine bay. The current ITG foam filter has never done this, no oil splatter. Occasionally a light oil mist on top of the can needs wiping down after some big boosting/spanking. But is all good now. Limited clean ups.
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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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MOTANUL  



Joined: 19 Nov 2018
Posts: 99
Location: ROMANIA BUCHAREST

PostPosted: Sun Jan 12, 2020 9:01 pm    Post subject: Reply with quote

I have never used aftermarket Oil Catch Can.

The expensive ones contain a filter in them (bronze filter).
https://www.youtube.com/watch?v=T-B4VRxAtbw

The 22 mm Inlets Size is not easy to find. I didn't measure the output exactly, but it looks pretty big too.

Which model best fits Porsche 931?
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