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Rasta, you suck, and you owe me $100.
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Chrenan  



Joined: 15 Jan 2003
Posts: 3899
Location: Canada

PostPosted: Sat Apr 19, 2008 2:30 am    Post subject: Rasta, you suck, and you owe me $100. Reply with quote

Well after this thread here:

http://www.924board.org/viewtopic.php?t=25316

I admitted to myself that venting my crankcase to atmosphere, while definitely cleaner in terms of intake air, is still not optimal. It was sort of lazy on my part, I knew there was a better solution but just couldn't be bothered until Rasta planted the seed.

So to get the best of both worlds, no crap going back into the intake air while maintaining crankcase vacuum, I ordered one of these:




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Rasta Monsta  



Joined: 12 Jul 2006
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PostPosted: Sat Apr 19, 2008 2:40 am    Post subject: Reply with quote


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-nick  



Joined: 16 Nov 2002
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PostPosted: Sat Apr 19, 2008 3:40 am    Post subject: Reply with quote

Couldn't you have just opened up a stock 931 separator and filled it with wire mesh? It even comes with a drain back to the oil pan
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Chrenan  



Joined: 15 Jan 2003
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PostPosted: Sat Apr 19, 2008 3:52 am    Post subject: Reply with quote

But it wouldn't be shiny and new.
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Min  



Joined: 04 Nov 2002
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Location: Vernon, British Columbia, Canada

PostPosted: Sat Apr 19, 2008 4:01 am    Post subject: Reply with quote

personally I'm going to try and find another way to make crank case vacuum(vacuum pump of some nature). But looks like a nice piece of gear chrenan.

Min
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Chrenan  



Joined: 15 Jan 2003
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Location: Canada

PostPosted: Sat Apr 19, 2008 4:04 am    Post subject: Reply with quote

I'll report back on how it works out, and what kind of deposits I end up seeing in the intake tract. Won't have it for a while as I was too cheap to pay for fast shipping.
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DOCO  



Joined: 04 Aug 2006
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Location: Keswick Ontario Canada

PostPosted: Sat Apr 19, 2008 4:23 am    Post subject: Reply with quote

Iquiring minds want to know....do the 924's not use a pcv system to vent the crankcase or are they the old style breather type?pcv vacuum controled....breather is just an open vent system.
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Doco "where am i going and why am i in this handbasket"author unknown
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Rasta Monsta  



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PostPosted: Sat Apr 19, 2008 5:28 am    Post subject: Reply with quote

There is no PCV valve, but I don't think one is required to characterize our system as "positive crankcase ventilation." The case doesn't just vent, it is actively evacuated by draw from the air filter.

Could be wrong of course!
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DOCO  



Joined: 04 Aug 2006
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Location: Keswick Ontario Canada

PostPosted: Sat Apr 19, 2008 7:41 am    Post subject: Reply with quote

ok similar system to the old cars that used a dump tube,and the air passed by it and made a vacuum that drew out the unwanted pressures.so what does the evacuated air pressures mixed with oil go to on these cars...must be that little plate on the side of the block with the mesh in it that everyone wants to clean.guess ya could run adump tube. ....but you would be doin yer part for the nviroment!!
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Doco "where am i going and why am i in this handbasket"author unknown
79 924 N/A "Webster"
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Ozzie  



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PostPosted: Sat Apr 19, 2008 7:57 am    Post subject: Reply with quote

Dont forget without a PCV you need a restrictor in the breather pipe
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flosho  



Joined: 01 Jul 2004
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PostPosted: Sat Apr 19, 2008 10:01 am    Post subject: Reply with quote

Is there any adverse affects of running just a catch can where the 931 air/oil separator usually is? I've been running without the line that normally went to the air box(which apparently means that it was just a breather system, not the evacuation system).

Chrenen, where did you purchase that catch can from?
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Neil924  



Joined: 18 Mar 2003
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Location: Canada

PostPosted: Sat Apr 19, 2008 10:34 am    Post subject: Reply with quote

flosho wrote:


Chrenen, where did you purchase that catch can from?


www.saikoumichi.com

Appears in the middle of his diagram.
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ideola  



Joined: 01 Oct 2004
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Location: Woodstock IL

PostPosted: Sun Apr 20, 2008 12:26 am    Post subject: Reply with quote

Speaking of sucking, while I would not necessarily advocate something like this for a pure street car, there is another solution for improving crankcase vacuum. Check out the racing vacuum pumps from GZ Motorsports.
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Lizard  



Joined: 03 Nov 2002
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PostPosted: Tue Apr 22, 2008 7:16 am    Post subject: Reply with quote

Sorry to tell you this Chrenan,

That is not going to really work all that well.

it will work ok of you take off that drain valve and put a pump on the bottom to pull the fluid out of there and pump it back into the crank case.
But even doing this will not give you any vacuum inside the crankcase.
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Rasta Monsta  



Joined: 12 Jul 2006
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PostPosted: Tue Apr 22, 2008 7:20 am    Post subject: Reply with quote

How do you figure that? Too constricted or something?
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