The pipe that's connected with a T piece to the hose from the rocker cover
to the canister protrudes from the bottom of the car and is cut off at an
angle to create a venturi effect when you're moving, thus sucking out the
oil vapours. I drove from Melb to Syd and the oil level didn't change, so
the amount of oil you lose as vapour is sod all.
-----Original Message-----
From: Andy Webster [mailto:trunkie@hotmail.com]
Sent: Wednesday, December 01, 1999 7:47 PM
To: David.Webster@smec.com.au
Subject: RE: PCV on a different manifold
How's that again? vertical 'venturi' tube?
The PCV keeps the crankcase under slight negative pressure, this keeps the
oil in. I've noticed a slight leak, from of all places, the rear side cover
retaining bolt since the PCV was disconnected.
I don't see the point of yours at all...why not just get another rear cover,
i.e with no oil separator canister, and use a vented oil cap?
>From: "Webster, David" <David.Webster@smec.com.au>
>To: 'Andy Webster' <trunkie@hotmail.com>
>Subject: RE: PCV on a different manifold
>Date: Wed, 1 Dec 1999 08:18:25 +1100
>
>Why don't you just set it up like mine, it's a lot easier and you don't
>have
>any oil vapour to lower your octane level!
>
>-----Original Message-----
>From: Andy Webster [mailto:trunkie@hotmail.com]
>Sent: Tuesday, November 30, 1999 5:19 PM
>To: Bryan.Vandiver@Eng.Sun.COM; ulix@u.washington.edu
>Cc: spridgets@autox.team.net
>Subject: Re: PCV on a different manifold
>
>
>Brian & Ulix,
>My engine is an 1098 from a sprite MkIII. The PCV valve is a wide 'funnel'
>shaped one that definitely attaches to the engine side of the S.U.
>throttles, rising vertically from a manifold balance tube and then at a
>right angle from the valve, down to the front cover separator.
>As for the dellorto ,I may have a hole drilled in either manifold stem and
>have a blance tube, probably just copper, attached. I know a plumber who
>can
>
>do this.
>Andy
>
> >From: Bryan Vandiver <Bryan.Vandiver@Eng.Sun.COM>
> >Reply-To: Bryan Vandiver <Bryan.Vandiver@Eng.Sun.COM>
> >To: ulix@u.washington.edu
> >CC: spridgets@autox.team.net
> >Subject: Re: PCV on a different manifold
> >Date: Mon, 29 Nov 1999 15:54:42 -0800 (PST)
> >
> >Ulix,
> >
> >Thanks for the info. I had picked up an orginal style PVC valve fairly
> >recently,
> >and just happen to be looking it over yesterday. It looks like it was
> >designed
> >to restrict the aiflow/vacuum as vacuum increases on it, so it may do
> >exactly
> >what I need, and hopefully eliminate oil being sucked into the intake
> >manifold.
> >
> >Regards,
> >Bryan
> >
> >to: Bryan Vandiver <Bryan.Vandiver@eng.sun.com>
> > >cc: trunkie@hotmail.com, spridgets@autox.team.net
> > >Subject: Re: PCV on a different manifold
> > >MIME-Version: 1.0
> > >
> > >Andy and Bryan,
> > >
> > >If you used a PCV valve from an early 1275 you should be fine.
> > >On those years, the PCV valve connects directly to the intake manifold.
> >A
> > >hose goes from there to the engine front cover oil separator.
> > >There is no fitting on the valve cover, but a vented oil cap is used to
> > >let air into the engine.
> > >
> > >You should use a Y and connect the PCV valve to both sides of the
> > >manifold.
> > >
> > >The PCV system that connects to the carbs directly that Bryan refers to
> > >was used on later 1275s and didn't use an external PCV valve.
> > >
> > >Good luck, Ulix
> > >
> > >
> > >On Mon, 29 Nov 1999, Bryan Vandiver wrote:
> > >
> > >> Andy,
> > >>
> > >> I think I have the same setup as you, (DHLA 40, LCB, 1275). I'm still
> >working
> >on
> > >> the PVC problem, but I can tell you what I've tried, and what the
> >problems
> >were.
> > >>
> > >> The original SU Setup, has a provision for PVC on the side of each
> >carburetor,
> > >> that is on the 'outside' of the throttle plate, this means that when
> >the
> > >> throttle is closed (idle, etc.) there is 'minimum' vacuum on the PVC
> >system.
> > >> However, on the sidedraft setup, the vacuum ports are on the engine
> >side of
> >the
> > >> throttle plates, giving you maximum vacuum when the throttle is
>closed.
> > >>
> > >> I tried hooking up the breather hose, off the timing cover to my
> >intake, but
> > >> because the vacuum is so strong at idle, it actually sucks oil up
>from
> >the
> > >> engine into the intake, resulting in large amounts of smoke in the
> >exhaust,
> > >> especially when the engine is cold. I tried using several types of
>PVC
> >valves,
> > >> and the largest inside diameter hose I could fit, but still had the
> >same
> > >> result.
> > >>
> > >> I think the best bet, is to pull the PVC off the valve cover to
> >minimize oil
> > >> into the intake manifold. I found a valve cover at a swap meet that
>I'm
>
> >going
> >to
> > >> try as soon as my car comes back from the body shop (a pickup backed
> >into
> >it).
> > >> In any case, I'll let you know how it goes.
> > >>
> > >> BTW - There is no balance tube on my intake either, so I have a Y
> >connector
> > >> that splits my PVC between the two sides of the intake.
> > >>
> > >> Regards,
> > >> Bryan Vandiver (59-bugeye)
> > >> San Jose, CA
> > >>
> > >> >X-Originating-IP: [203.101.49.163]
> > >> >To: spridgets@autox.team.net
> > >> >Subject: PCV on a different manifold
> > >> >Mime-Version: 1.0
> > >> >
> > >> >howdy,
> > >> >Does anyone have any tricks or tips for restoring the crankcase
> >ventilation
> > >> >on my sprite, since I put the dellorto carb and manifold on which
>has
> >no
> > >> >real provision for it?
> > >> >The manifold has holes in each 'barrel' but they are presently
>blocked
>
> >up
> > >> >with screws. Is it OK for the PCV to go into just one barrel , and
> >thus only
> > >> >two of the cylinders? A balance tube between them with an outlet
>would
>
> >be
> > >> >handy...
> > >> >Im getting an annoying rattle from the extractor hitting the chassis
> >rail
> > >> >when the engine wobbles...I need to cushion it somehow.
> > >> >thanks
> > >> >Andy
> > >> >
> > >>
> > >>
> > >
> > > Ulix __/__,__ ___/__|__
> >
>
>..............................................(_o____o_)....<_O_____O_/...
> > >http://students.washington.edu/~ulix/ '67 Sprite '74 X1/9
> > >
> >
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