Is that a new title for you John, The Boost Nazi...
Boy am I glad I drive a Normally Aspired Engine : )
Dennis
----- Original Message -----
From: "John J. Stimson-III" <john@harlie.idsfa.net>
To: "Jake Hodges" <jake@codeworm.com>
Cc: <ba-autox@autox.team.net>
Sent: Wednesday, May 28, 2003 9:33 AM
Subject: Re: Pop-off valves in STX?
> On Wed, May 28, 2003 at 09:08:07AM -0700, Jake Hodges wrote:
> > I'm asking for a friend.. I don't actually know what a pop-off valve
is,
> > but apparently it's desirable in some way.
> >
> > 1. Is it legal in STX?
> >
> > 2. For my own information, what does it REALLY do? I've heard some
"fast
> > and furious" explanations, if you know what I mean, but I'd like someone
> > with some understanding of the English language to show off how much
they
> > know on the subject to help my friend make an informed decision.
>
> 2. As I understand it, a blow off valve or pop off valve is a valve in
> the pressurized segment of the intake manifold which opens to vent
> some air when the pressure reaches a certain level. They can be
> used for either safety (to make sure that the engine never gets too
> much boost) or for tuning (to choose the desired boost at a given
> operating point). It's the thing that makes the Psssh! noises when
> you're playing Gran Turismo :-) The car probably already has a BOV,
> but it probably opens at some wimpy pressure like +6psi and doesn't
> make a sufficiently intimidating whoosh noise.
>
> 1. No, I don't think that they are legal for STX, since STX's engine
> prep rules are generally as or more restrictive than SP and SP
> doesn't allow them. BOVs are a direct way of controlling your
> boost, and you're not allowed to mess with the boost anywhere other
> than Mod, and *possibly* Prepared.
>
> "NO BOOST FOR YOU!"
> -The Boost Nazi
> --
>
> john@idsfa.net John Stimson
> http://www.idsfa.net/~john/ HMC Physics '94
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