Good Morning Henry,
Seems like you draw attention to an important issue about a 'closed system'
relative to the use of the vacuum system.
(yes we run a closed system)
What do mean by a shoddy build? Sealing all the gasket points and
neoprene/viton seals properly?
i suspect the felt rope seal is one of the worst offenders. without the felt
seal in place you can place a flashlight behind the bearing block and see lots
of light. Murphy bangs away with a special tool until the FELT actually
extrudes from the block....and doesnt seem to have a problem.
Joe Alexander
A. R. E.
645 1st Street
Jesup, Iowa 50648
319.464.4711 (cell)
n197tr4@cs.com
-----Original Message-----
From: yellow04 <yellow04@tr4racer.com>
To: fot <fot@autox.team.net>
Sent: Wed, Feb 1, 2012 4:15 am
Subject: Re: [Fot] VACUUM SYSTEM
All this chatter about vacuum systems got me thinking. Obviously, the system
relies on having a closed crankcase. My crankcase vents to my catch tank. I
have two lines to the catch tank, one from the fuel pump blank on the block,
the other to the rocker cover. Most setups I see are quite similar. Are you
guys running the vacuum systems running a similar catch tank setup, but
without the vent?
Another thought, while I have witnessed race cars with vacuum systems that
were remarkedly free of oil drips, I have also seen cars with vacuum systems
that leak just as bad or worse than typical. I believe a vacuum system will
make a good, tight engine surprisingly dry, but can't overcome any
significant issues with a shoddy build. If the system can't pull a vacuum
because of leaks, it's not going to do much.
Henry
yellow04@tr4racer.com
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