Sender: <marv@lancaironline.net> (Marvin Kaye)
To: flyrotary
Date: Mon, 31 Mar 2003 22:33:51 -0500
Message-ID: <redirect-2100309@logan.com>
Reply-To: <13brv3@mchsi.com>
From: <13brv3@mchsi.com>
Subject: RE: [FlyRotary] Re: boost control?
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In-Reply-To: <list-2088081@logan.com>

I just ordered the best popoff (relief) valve that I have found.  I =
looked
at this before, but could never figure out the pressure rating.  =
According
to the manufacturers page ( =
http://www.greddy.com/products/blowoffvalves.htm
)  it's adjustable from .08 kg/mm2 to 2.0 kg/mm2.  Converting that to =
psi,
gives a minimum setting
of about 114 psi.  Some safety device :-)    I noticed that some of =
their
other devices are listed with ratings in the kg/cm2 range.  Assuming =
that's
what they meant, the relief valve should have an adjustment range of 1.1 =
to
28 psi.  =20
------------------

--- As a follow-up, I just got the relief valve, and the minimum setting =
is
probably around 12 psi.  The valve itself is nice, as long as I can get =
the
pressure rating down.  It's about 4" long total, and about 1.5" in =
diameter,
and has threads on the end that goes to the intake.  I got the adapter =
plate
too, so installation should be a snap.  The valve screws apart, and has =
a
pretty darned heavy spring inside.  I'm sure I can find a suitable
replacement spring to lower the pressure to our desired level.  I'll =
look
tomorrow, as well as trying to put together enough fittings to hook this
thing up to an air source and gauge for pressure setting. =20

Rusty