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diference in bov's

 
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Old 26 Dec 2010, 09:01 pm
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Default diference in bov's

ok so i have been looking at the mopar bov plate thing for my cruiser and i have read that it dosent improve the performance it just sounds sweet. at first it was good to go but then i looked in to acual blow of valves on other sites i mean no one makes a specific bov but they have universal one that you can make fit anyways back to the question at hand is there any real performance gain to the more expencive ones and also why is there no performance gain in the mopar one i mean if it vents the air out insted of back through the turbo why not any performance i know a lot of questions but what can i say i am curious thanks.
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Old 26 Dec 2010, 10:46 pm
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Default Re: diference in bov's

First, people do make specific BOV's. Top manufacturers are Tial, GReddy (bankrupt?), HKS, Turbosmart, TurboXS and a few others. The things that vary are the mounting flanges. To use any of these, you'd need to purchase (or make) a block-off plate for the factory surge valve, and then install a hard pipe with your BOV fixed to it, then run a vacuum line to the BOV.

Secondly, there is no real performance gain. It's essentially like adding a different sounding tip to the end of a whistle. The air moves outward just the same, it just has a different sound.

Thirdly, you touched on another subject: recirculation. Some people vent their BOVs to atmosphere, while others recirculate it back to the intake. I won't go into the benefits or shortcomings of either one-- it comes down to preference.

Bottom line: no performance gain, but it does sound cool.. no doubt about it.
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Old 26 Dec 2010, 10:49 pm
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Default Re: diference in bov's

from what one of friends told me about the bov it doesn't sound like it has anything to do with performance. He told me that w/o one it could ruin the turbo. so idk, i don't have a turbo so i really can't say but like i said, it sounds like do nothing for performance, idk, lol.
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Old 26 Dec 2010, 10:51 pm
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Default Re: diference in bov's

BOV is a 'surge valve' and it does just as it says it does. It purges the charge pipes of boost in between shifts (manual) or after you let off the gas (automatic).
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Old 27 Dec 2010, 01:48 am
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Default Re: diference in bov's

my friend told me that the air bounces off of the closed throttle body and the bov helps gets rid of the back pressure do it doesn't go back to the turbo
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Old 27 Dec 2010, 01:50 am
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Default Re: diference in bov's

Basically, yeah.
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Old 27 Dec 2010, 01:50 am
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Default Re: diference in bov's

If you're pushing 20lbs or less, it's pointless unless you want the cool sound

It is a good excuse though for replacing the cold up-pipe!
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Old 27 Dec 2010, 01:51 am
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Default Re: diference in bov's

so i guess the only performance enhancement it provides, is keeping your turbo safe.
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Old 27 Dec 2010, 01:53 am
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Default Re: diference in bov's

Quote:
Originally Posted by Kawizx9r View Post
If you're pushing 20lbs or less, it's pointless unless you want the cool sound

It is a good excuse though for replacing the cold up-pipe!
how much air pressure do it take to open the piston on a BOV?
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Old 27 Dec 2010, 01:56 am
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Default Re: diference in bov's

EDIT:
[To answer your last question]: Depends on the BOV.

[In reference to the thread as a whole]: It has nothing to do with what boost level you're running. A turbocharged system needs a surge valve (blow-off valve, whatever). It'll be a much more pronounced sound if you're running at higher boost levels, but I never had a problem hearing mine running at 8-10psi.
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