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G35 & G37, Coupes & Sedans

Blow-out valve

Old Sep 11, 2006 | 06:46 PM
  #1  
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Blow-out valve

Noob question.

If I get a turbo, do I HAVE to install a blow-out valve?
what about supercharger..

I don't want that psfffttttt sound every time i shift
 
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Old Sep 11, 2006 | 06:48 PM
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Its a blow off valve.!!
yes you do if you want your car to whistle.!!
 
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Old Sep 11, 2006 | 06:50 PM
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i think its 'blow off valve'? and i think it minimizes turbo lag? im not sure tho
 
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Old Sep 11, 2006 | 07:19 PM
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Supercharger:
Stillen Supercharger don't have a BOV
Vortech does have BOV
ATI Procharger I think does have BOV (Please correct me if I'm wrong)


Turbo:
TN, APS, Greddy all have BOV (Greddy you have to buy the BOV separately I thing)
JWT has a Recirculating Valve but can be change to a BOV with minor mod.

BOV is nice for show but after awhile of driving it, it can be annoying and attract to much attention.
 
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Old Sep 11, 2006 | 07:53 PM
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BOV sound sick! why wouldnt you want one??

and yeh..its blow off valve..
 
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Old Sep 11, 2006 | 07:58 PM
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after i installed my 'blow-job valve' girls just seem to flock to me.
 
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Old Sep 11, 2006 | 08:01 PM
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Originally Posted by Saqib
i think its 'blow off valve'? and i think it minimizes turbo lag? im not sure tho
It is used is to prevent compressor surge. Compressor surge is a phenomenon that occurs when lifting off the throttle of a turbocharged car (with a non-existent or faulty bypass valve). When the throttle plate on a turbocharged engine running boost closes, high pressure in the intake system has nowhere to go. It is forced to travel back to the turbocharger in the form of a pressure wave. This results in the wheel rapidly decreasing speed and stalling. The driver will notice a fluttering air sound. In extreme cases the compressor wheel will stop completely or even go backwards. Compressor surge is very hard on the bearings in the turbocharger and can significantly decrease its lifespan. In addition, the now slower moving compressor wheel takes longer to spool (speed up) when throttle is applied. This is known as turbo lag

With the implementation of either a bypass valve or a blowoff valve the pressurized air escapes, allowing the turbo to continue spinning. This allows the turbocharger to have less turbo lag when power is demanded next.
 
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Old Sep 12, 2006 | 01:47 AM
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You can use a closed circuit if you want to minimize and possibly eliminate that sound.
 
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Old Sep 12, 2006 | 03:11 AM
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From: so.cal - SFV
Originally Posted by hai109
It is used is to prevent compressor surge. Compressor surge is a phenomenon that occurs when lifting off the throttle of a turbocharged car (with a non-existent or faulty bypass valve). When the throttle plate on a turbocharged engine running boost closes, high pressure in the intake system has nowhere to go. It is forced to travel back to the turbocharger in the form of a pressure wave. This results in the wheel rapidly decreasing speed and stalling. The driver will notice a fluttering air sound. In extreme cases the compressor wheel will stop completely or even go backwards. Compressor surge is very hard on the bearings in the turbocharger and can significantly decrease its lifespan. In addition, the now slower moving compressor wheel takes longer to spool (speed up) when throttle is applied. This is known as turbo lag

With the implementation of either a bypass valve or a blowoff valve the pressurized air escapes, allowing the turbo to continue spinning. This allows the turbocharger to have less turbo lag when power is demanded next.
FINALLY SOMONE THAT EXPLAINED IT... I WAS HOPING THAT AS I KEPT ON READING SOMEONE WOULD EXPLAIN AS TO WHY THE BOV WAS NECESSARY RATHER THAN IT'S NOISE. LOL JEEBUS CHRISTMAS
 
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Old Sep 12, 2006 | 03:12 AM
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From: so.cal - SFV
yes and there are plumb backs.. there are atmospheric(the ones that make those precious sounds that you guys love so much lol) and recirculated BOVs (self explanitory).
 
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Old Sep 12, 2006 | 03:13 AM
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From: so.cal - SFV
^~~~ in regards to ATHEN_G guy sorry
 
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Old Sep 12, 2006 | 10:20 AM
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/\ I don't know what are you getting at? I just gave the original poster all the popular kit and if it come with BOV or Not. He said he didn't want a BOV and the two kit that comes stock without it or desing to not have it is Stillen and JWT (at least is recirculating and not as bad as atmospheric). If you wanted a dictionary definition then I would've given that to you
 

Last edited by FI'ed G; Sep 12, 2006 at 10:27 AM.
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Old Sep 12, 2006 | 10:37 AM
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If you don't want the sound, plumb it back into the intke tract.

But it's a relatively cheap part that extends the life of your turbo, so why wouldn't you want to use one? In addition, you can also use it as a secondary wastegate, to some extent. Nice bit of insurance. You can go loud-as-hell or barely audible, which should address any reservations you might have about using one.
 
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Old Sep 13, 2006 | 11:15 AM
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thanks

thanks for all your inputs guys.
Learned a lot with this post especially hai109's..
Thanks!
 
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Old Sep 13, 2006 | 12:02 PM
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i have the vortech supercharger and i set the bov to the loudest setting. you want this..

its like saying you want to have sex but with a small d!ck.
 
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