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Blow off valve? 

 

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 Post subject: Blow off valve?
Posted: Mon Feb 18, 2008 6:43 pm 
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Whats the downside of not running a blow off valve?
Will it be bad for spooling time as the air rushing back through the impeller.

Also if i did get one I want just one big dump of air, a sneeze. dont like the whistling noise some of them have.
anybody got some sounds of theres in a video and the type and size they have?

 

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Posted: Mon Feb 18, 2008 7:12 pm 
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Just run a plumb back BOV it won't make the noise. the noise can vary depending on the brand type and trumped fitted for atmospheric ones. Noise also varies depending on vehicle fitted to and whats making the boost on that vehicle.

 

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Posted: Mon Feb 18, 2008 7:16 pm 
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it will be a turbo on about 7psi of boost.
with the plumback, i plumb it back before the turbo after the pod filter?
and with that could I use a hose or does it have to be pipe.
is there any size thats too small for my car?

 

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Posted: Mon Feb 18, 2008 8:59 pm 
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i use a factory BA/F XR6T BOV ... its the black plastic Bosch type

currently i have it venting to atmosphere cos im lazy. so it sneezes kinda
went its plumb-back it will be quiet


you want the BOV as close to the throttle body as possible.
and to plumb it back, it goes betweent the pod and the turbo
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Posted: Tue Feb 19, 2008 9:50 pm 
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Tocchi wrote:
i use a factory BA/F XR6T BOV ... its the black plastic Bosch type

currently i have it venting to atmosphere cos im lazy. so it sneezes kinda
went its plumb-back it will be quiet


you want the BOV as close to the throttle body as possible.
and to plumb it back, it goes betweent the pod and the turbo


Where have you got yours mounted mate? If it's close to the t/b, how are you planning to run the return lines to plumb it back? I'm getting the same done, but just can't see how they'll do the pipework neatly.
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Posted: Tue Feb 19, 2008 10:09 pm 
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heres a pic of my bov setup

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Posted: Tue Feb 19, 2008 10:21 pm 
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can u get a closer picture of the blow off valve and is there any lines running to it?

 

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Posted: Tue Feb 19, 2008 10:55 pm 
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ok theres the main line from BBM
and the smaller vacuum hose, which ive put a T-piece from the vacuum line at the back of the BBM

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Posted: Wed Feb 20, 2008 10:38 am 
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el_xr6_luke wrote:
can u get a closer picture of the blow off valve and is there any lines running to it?

Here is a closeup of mine
Image
You can see it plumbs back and atmosphere's as I run a two stage set up.

Without a BOV the forced air is forced back pas the turbine creating the 'dose' or 'flutter'. it also slows the turbo down, so boost takes longer make boost.
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Posted: Wed Feb 20, 2008 12:24 pm 
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how does the 2 state setup work, when does it vent to atmosphere and when does it plumbback? is it random or your choice when

 

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Posted: Wed Feb 20, 2008 12:34 pm 
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Ive got some bosch bov's for sale if any one wants them?

 

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Posted: Wed Feb 20, 2008 12:36 pm 
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FLASH wrote:
Ive got some bosch bov's for sale if any one wants them?

would that be the plastic type xr6 turbo ones?
if so how much

 

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Posted: Wed Feb 20, 2008 12:48 pm 
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Yeah the xr6 turbo ones. Just give me two sec's and ill get a price.

 

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Posted: Wed Feb 20, 2008 1:16 pm 
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el_xr6_luke wrote:
how does the 2 state setup work, when does it vent to atmosphere and when does it plumbback? is it random or your choice when
Plumb back first, the under big vacuum it dumps it into the atmosphere.
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Posted: Wed Feb 20, 2008 3:22 pm 
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so how much for the blow xr6 turbo blow off valves? and does it come with a steel adapter that i can weld onto my piping.
thanks

 

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