[s-cars] Catch Can extended Candle theory does not apply

[djdawson2@aol.com]

Yep,
The valve cover is not vented in any way, except through the crankcase.  Further... that hose that T's directly into the intake manifold only allows flow at idle (high vacuum) and closes off as soon as vacuum drops.  At that point, all ventilation flows through the intake of the turbo.
 
Todd, the reason you have "the sludge to prove it" is because while the engine is under operation, oil vapors are continously flowing throughout the system... either directly through the intake manifold (idle), or through the turbo inlet (all the time except idle).  This oil vapor will condense as soon as it gets to something cooler... usually the X-over to IC hose... and inside the IC.
 
Even if you go to a catch can, you're still not eliminating the IM path for recirculation.
HTH,
Dave
 
-----Original Message-----
From: jpb3 <jpburns3 at gmail.com>
To: S-CAR at audifans.com <S-CAR-List at audifans.com>
Sent: Thu, 4 Aug 2005 10:42:27 -0400
Subject: Re: [s-cars] Catch Can extended Candle theory does not apply


Guys,
The crankcase breather hose that dumps into the turbo intake cannot
draw any oil from the valve cover as it is totally sealed from the
valve cover!  There is an enclosed tube that runs through the valve
cover.

john

On 8/4/05, Mark Strangways <Strangconst at rogers.com> wrote:
> I don't think I can agree with you too much, sorry.
> I can't see a simple 90 degree entry point becoming a very good venturi.
> 
> Mark
> ----- Original Message -----
> From: "TODD KRAMER" <toddekramer at msn.com>
> To: <s-car-list at audifans.com>
> Sent: Thursday, August 04, 2005 1:54 AM
> Subject: Re: [s-cars] Catch Can extended Candle theory does not apply
> 
> 
> > In this debate, I think using the candle experiment is moot. A turbo
> > motor,
> > plumbed as the AAN is, will draw the crankcase under vacuum while under
> > boost.
> >
> > The pressure created by the spooling turbo, as our crankcase breather hose
> > plumbs directly into the intake path at a 90 degree, the rush of intake
> > air
> > will draw the vapors out of the valvecover. As the oil is swimming across
> > the valvetrain and towards the breather hole ... some will get sucked in.
> > Under high enough boost (say,during overboost for modified engines), I
> > will
> > go as far as saying, that a significant amount of oil will be sucked into
> > the intake path. ... got the sludge to prove it.
> >
> >
> >
> > ________________________
> > Todd E. Kramer
> > '95 S6, far from stock
> >
> > _________________________________________________________________
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> >
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