[Fot] Crank case evacuator question

[Kramer, Robert]

Doesn't Richard Good sell a canister to separate the smoke from the oil?

Bob Kramer
Southern Construction Inventory Manager
RDO Equipment Company
16415 N. IH 35  Pflugerville, TX 78660
512-687-7422 Office
512-657-8526 Cell


Things turn out best for the people who make the best of the way things turn
out. ~John Wooden


-----Original Message-----
From: fot-bounces at autox.team.net [mailto:fot-bounces at autox.team.net] On Behalf
Of Robert M. Lang
Sent: Friday, August 26, 2011 2:17 PM
To: Chuck Arnold and/or Kathleen Kelley
Cc: Friends
Subject: Re: [Fot] Crank case evacuator question

Hi,

I don't know the full theory on this stuff, but the key here is that you have
_pressure differential_ between the crank case (or valvetrain) and the catch
tank. In order to keep oil from blowing out of every crevice on the motor,
this differential must be negative where you want the oil (or
vapor) to flow.

So, you don't need a lot of vacuum - you just need lower pressure than what's
inside the engine.

You can get crazy with all this, but if the goal is to stop leaks and stuff,
you need "just enough". Two 5/8" hoses is def better than one 1/2"
hose (which is what the factory used for Federal Emissions cars) - so two
AN10's would be great.

As far as the "breathing" part, you just need about the same surface area of
outlet as the hose(s) you are using to vent the valve cover. If you use MORE
area in the outlet you can't get lower pressure in the catch tank and you more
or less defeat the purpose OR you need to find a better method to reduce the
pressure in the catch tank...

My setup works pretty well. Even when I had a broken ring (30% leakdown past
the rings) the motor didn't leak at all! Surprised me too (when I ran the
leakdown test).

I like the suggestion of a baffle in the valve cover. That's what the factory
did (although they also use a screen which is overkill IMHO).

c ya,
rml
---------------------------------------------------------------------------
Bob Lang              Triumph TR6!!            |  This space for rent
Former NER Solo Chair                          |
Voice:617-253-7438                             |  Cell: 339-927-4489
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