[s-cars] Oil Vapour Catch Cans - Any recommendations

Wed Aug 3 14:14:25 EDT 2005

I thought the candle reference would bring you out of the woodwork ;-) would be interesting to see the results of an anemometer (thanks for confirming there is air flow), however I guess it can't hurt in vortexing the air during the seperation process, but I still suspect it's the double wall design that's doing most of the work?  

I guess an aircraft engine doesn't blow any air? or maybe this is their way of justifying their design... 

-----Original Message-----
From: Trevor Frank [mailto:tfrank at symyx.com]
Sent: Wednesday, August 03, 2005 1:40 PM
To: James Murray (QA/EMC); Dave Forgie; s-car-list at audifans.com; brian
bilotti
Subject: RE: [s-cars] Oil Vapour Catch Cans - Any recommendations

Hmm...blow out a birthday candle, well...just put your can over your
crank case breather at idle.  I dunno about your car but mine can really
blow.  Bosch and BMW's M5 uses the same catch can design, 2 of them and
it isn't even turbo charged.  I am positive on an older motor with bad
leak down it's probably even more effective.  The How and of it working
I dunno, does it actually separate mass out with high velocity vortexing
separation?  I suspect the low pressure area in the middle isn't a bad
idea and at least wetting the walls, spitting the oil on it isn't a bad
idea.  Even the simplest air oil separators use some way of doing this,
often with a metal filter-ish thing or what I have done in the past is
to use fuel cell foam. 

The cad drawing that I did was specifically for a chemical reactor, not
cheap to make, but it wasn't my money and it needed to work so.

Anyone have a running car and a hot wire anemometer that they can check
the ventilation flow with?  From there maybe we can optimize the area
and diameter of the "vortexing style" separator.  I have the anemometer
but no running car. A cracked cylinder head :(

-----Original Message-----
From: James Murray (QA/EMC) [mailto:james.murray at ericsson.com]

Sent: Wednesday, August 03, 2005 5:53 AM
To: Dave Forgie; s-car-list at audifans.com; 'brian bilotti'
Cc: Trevor Frank
Subject: RE: [s-cars] Oil Vapour Catch Cans - Any recommendations

Sounds very interesting Brian... was thinking about this last night,
thanks for clearing my head of work ;-) from what I've seen/read of
Trevor's work I'm sure it's top notch... however I must ask, is there
enough air flow (pressure) to create a "centrifugal" force?

Dave doing some surfing last night (thank again for the distraction
guys...) I came across this article in Autospeed you might find
interesting: http://autospeed.drive.com.au/cms/A_1101/article.html

and here's a "aircraft" quality item, albeit very expensive:
http://www.m-20turbos.com/breather.htm

This part of the web site is particularly interesting...
http://www.m-20turbos.com/separator_facts.htm according to this web site
"pressures coming off the crankcase could not blow out a birthday
candle, much less set up a spiral flow powerful enough to sling out the
oil." so perhaps Trevor's design works well not because of the
centrifugal force but because it's a two stage (2 cans in one) design,
which seems to be the premise for this design although with more
stages...and more coin. Yes, I know... not everything you read off the
web is true!

Cheers, /Jamu.

P.S. Trevor, I cc'ed you... cause it's your design... and I didn't want
your ears burning ;-)

-----Original Message-----
From: s-car-list-bounces at audifans.com
[mailto:s-car-list-bounces at audifans.com]
Sent: Tuesday, August 02, 2005 10:05 PM
To: Dave Forgie; s-car-list at audifans.com
Subject: Re: [s-cars] Oil Vapour Catch Cans - Any recommendations

Guys, guys, guys,
BTDT. These breather bottles don't work. You NEED a
centrifugal oil separator. Air/oil goes in at an angle
at the top, spins around in a double walled  cylinder,
oil drains back to the block and air goes out through
a filter or into the exhaust. Trevor Frank built one
for me. I have a CAD drawing.

Anybody willing to step up on the manufacturing
end?????

Oh, btw, it works like champ.

Lemme know
bb

--- Dave Forgie <forgied at ae.ca> wrote:

> James:  I found the Jaz can on my first Google
> search but not that particular URL. Your link had
> some good points, e.g. oil vapour displacing air
> space (hmmm... that won't help a lean AFR though....
> hmmmmm).
>

> Anyway,  I also found this one:
>

>
http://www.nissansilvia.co.nz/tech/ghettocatch/ghettocatch.htm
>

> Might be a way to go.  I am starting to think about
> using the catch can to condense the vapours but
> actually venting the treated air to the turbo
> (rather than the atmosphere).  I don't need my car
> to smell like ancient big block muscle car V8.  (Not
> that there is anything wrong with that).
>

> Dave F.
>

>

>

> >>> "James Murray (QA/EMC)"
> <james.murray at ericsson.com> 08/02/05 04:35PM >>>
> Dave, have a look at this... opinions?
>

> http://cjsupra.kendra.com/PCV-Can.html 

>

> /Jamu.
>

> -----Original Message-----
> From: s-car-list-bounces at audifans.com 

> [mailto:s-car-list-bounces at audifans.com] 

> Sent: Tuesday, August 02, 2005 6:54 PM
> To: s-car-list at audifans.com 

> Subject: [s-cars] Oil Vapour Catch Cans - Any
> recommendations
>

>

> When I removed my Samco Michelin Man and OEM
> Intercooler for my Tom  

> Mullane/Marc Swanson FMIC installation, I was
> shocked to see a lot of oil  

> accumulated in the lower ridges of the Samco. I used
> to think it was my old
>  OEM K24 turbo was the source of the oil in the OEM
> rubber MM hose, now I  

> realize that I must have some blow by.
>

> Not wanting to coat the inside of the new FMIC, I
> need to install a catch can.
>  I have searched with Google and found some
> commercial and home-made  

> examples. Any of you running a catch can they want
> to recommend?
>

> Dave F.
>

>

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