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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