Jim ... I kinda had a question along the same lines...
If one of the advantages of a Drysump is that it develops a Vacuum to aid
in sealing the rings... why would I vent the Valve covers to the Outside
atmosphere...
We do some Vacuuming in our business here... and I know it doesn't take
much of an air leak to decrease vacuum to atmospheric Pressure...
Just a curious thought.... K
----------
> From: Skip & Joyce Higginbotham <saltrat@pro-blend.com>
> To: Jim Dincau <jdincau@qnet.com>; land-speed@autox.team.net
> Subject: Re: Breathers
> Date: Monday, January 15, 2001 3:11 PM
>
> Hi Jim,
> The tank vent will probably be enough unless you hole a
> piston......then......??????
> We run rocker cover vents.....open to the atmosphere. Might be on the
safe
> side and use both?
> Skip H
>
>
>
>
>
>
>
> At 12:17 PM 1/15/01 , you wrote:
> >Hi all, another poll,
> > On the modified (blown/fuel), because of past experience with
torching
> >pistons, we run two number 12 lines direct to atmosphere from the valve
> >covers. I know this isn't the most environmentally friendly thing to do
but
> >we have ballooned oil pans and catch tanks before and they are expensive
to
> >replace.
> > On unblown gas dry sump engine, will a two scavenge stage pump
pull
> >enough vacuum to allow venting the tank only? If additional vents are
> >required is the rocker can or the tappet chamber a better place to vent?
> >Jim in Palmdale where it has actually rained an inch this month
|