Terry
Whats the difference between MAP,VAFM,MAF and AFM?
>From: Julian <[EMAIL PROTECTED]>
>Reply-To: [EMAIL PROTECTED]
>To: [EMAIL PROTECTED]
>Subject: Re: What is a BOV?
>Date: Tue, 19 Sep 2000 16:14:42 +1000
>
>yep what pressure does it release at? 50psi?
>
>Terry Rudd wrote:
>
> > Julian,
> > You got a variety of answers to this eh - come on turbo guys, you should
> > know the correct answer to this question.
> >
> > Wastegate - bleeds excessive boost to either exhaust or atmosphere ie
>sets
> > the output pressure of the turbo
> >
> > Over Boost Valve (OBV) - bleeds excessive boost from the inlet to
>atmosphere
> > if the wastegate fails ie engine protection
> >
> > Blow Off Valve (BOV) = bleeds boosted air whist the butterfly is in the
> > closed position from between the turbo outlet and the throttle body to
> > either atmosphere (pssst) if using a MAP sensed computer or to the inlet
> > side between the airflow meter and the turbo if using VAFM or MAF sensed
> > computer and an intercooler is recommended for the later AFM types as
>the
> > air is hot from the first time round. The purpose of the BOV is to
>prevent
> > the turbine stalling when the throttle body is closed and is triggered
>by
> > low vacuum in the manifold.
> >
> > terry
> >
> > -----Original Message-----
> > From: [EMAIL PROTECTED]
> > [mailto:[EMAIL PROTECTED]]On Behalf Of Julian
> > Sent: Monday, 18 September 2000 3:01 PM
> > To: OZDAT
> > Subject: What is a BOV?
> >
> > Ok, yeh i know what a BOV is used for, but what a BOV actually do?
> >
> > >From what i can tell it is just a pressure relief valve, so when a
> > certain pressure on the BOV is attained, it releases, letting a large
> > amount of pressure through the valve (back into the intake or to
> > atmosphere).
> >
> > If this assumption is correct, then what i want to know is what pressure
> > do BOV's usually vent at?
> >
> > Could you use any valve which has enough flow when it vents?
> >
> > The reason i am asking is because i have contacts at a large pneumatic
> > supplier so I can possibly experiement with different industrial valves
> > if i can find any that fit the purpose..
> >
> > just a thought anyway
> > - Julian
> >
>
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