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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