Silly question about blow of values
07-10-2005, 12:39 PM
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Silly question about blow of values
What is the purpose of a blow of value?
I thought its purpose was to releave excess boost, but isn't that also what the wastegate is for? Why would you need both?
I thought its purpose was to releave excess boost, but isn't that also what the wastegate is for? Why would you need both?
07-10-2005, 12:43 PM
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Originally Posted by Rx-A-Ho
What is the purpose of a blow of value?
I thought its purpose was to releave excess boost, but isn't that also what the wastegate is for? Why would you need both?
I thought its purpose was to releave excess boost, but isn't that also what the wastegate is for? Why would you need both?
The blowoff valve (BOV) helps extend the life of the turbo by venting the pressure buildup when you let off the throttle. Otherwise, the boost pressure would back up into the inlet and stall the turbo's turbine side, which puts a lot of stress on it and causes it to wear out sooner.
07-10-2005, 01:08 PM
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Blow Of Value Lol!!!
Originally Posted by Rx-A-Ho
What is the purpose of a blow of value?
I thought its purpose was to releave excess boost, but isn't that also what the wastegate is for? Why would you need both?
I thought its purpose was to releave excess boost, but isn't that also what the wastegate is for? Why would you need both?
07-10-2005, 01:43 PM
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Because it's a typo and he amuses easily. "of" instead of "off", "value" instead of "valve".
________
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________
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Last edited by PUR NRG; 05-01-2011 at 06:27 AM.
07-10-2005, 02:03 PM
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Originally Posted by Sapphonica
Yes, it does relieve excess boost, but not the same way as a wastegate.
The blowoff valve (BOV) helps extend the life of the turbo by venting the pressure buildup when you let off the throttle. Otherwise, the boost pressure would back up into the inlet and stall the turbo's turbine side, which puts a lot of stress on it and causes it to wear out sooner.
The blowoff valve (BOV) helps extend the life of the turbo by venting the pressure buildup when you let off the throttle. Otherwise, the boost pressure would back up into the inlet and stall the turbo's turbine side, which puts a lot of stress on it and causes it to wear out sooner.
07-10-2005, 02:10 PM
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Originally Posted by Rotary Rasp
So how does the wastegate relieve boost?
07-10-2005, 02:15 PM
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Originally Posted by Im_DANomite
why is that the funniest thing you've heard?
07-10-2005, 02:35 PM
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Originally Posted by Cynic10508
It doesn't relieve boost like a BOV it restricts the turbo. A wastegate sits in the exhaust system before the turbo. When pressure builds high enough then it starts venting exhaust around, bypassing the turbo altogether. This keeps the turbo from constantly increasingly the boost until Bad Things Happen.
07-10-2005, 03:31 PM
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One more "silly" question. Is the BOV strictly a part for the turbo or can it be put on the stock engine alone to give the engine that "wooshing" sounds at high revs?
07-10-2005, 05:28 PM
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Lschiavo,
I appologize for my spelling errors. I was far too hasty when I was typing my question. The spelling errors in my post were so bad that nobody understood my question, but instead fell out of their computer chairs laughing at my idiocy. Your superiority is obvious and overwhelming.
Thank you for the value you added to my education.
j00 ru><0r.
I appologize for my spelling errors. I was far too hasty when I was typing my question. The spelling errors in my post were so bad that nobody understood my question, but instead fell out of their computer chairs laughing at my idiocy. Your superiority is obvious and overwhelming.
Thank you for the value you added to my education.
j00 ru><0r.
07-10-2005, 06:11 PM
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You can add a BOV to any intake system, but with no positive pressure, there is no pressure to relieve and hence, no "whoosh". There are electronic piezo speaker systems that will make this noise, but it's kind of, well, ...
The BOV only relieves pressure when you lift off the gas and the throttle plate closes (or partially closes). The compressed air that was formerly filling your combustion chamber now will escape through the BOV instead of hitting the forward spinning turbine fins. This does two things, one-it saves wear and tear on the turbo shaft (as mentioned above) and two-allows the turbine to maintain some of it's rpm's. This helps when you get back on the gas to get to max boost faster.
The wastegate is simply used to control boost, not bleed any off. the wastegate is boost pressure activated and opens a valve to release exhaust gasses before they hit the impeller blades in the turbo.
The BOV only relieves pressure when you lift off the gas and the throttle plate closes (or partially closes). The compressed air that was formerly filling your combustion chamber now will escape through the BOV instead of hitting the forward spinning turbine fins. This does two things, one-it saves wear and tear on the turbo shaft (as mentioned above) and two-allows the turbine to maintain some of it's rpm's. This helps when you get back on the gas to get to max boost faster.
The wastegate is simply used to control boost, not bleed any off. the wastegate is boost pressure activated and opens a valve to release exhaust gasses before they hit the impeller blades in the turbo.
07-11-2005, 09:35 AM
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Originally Posted by StealthTL
....if you put one on the intake of a 'normal' car, would that make it a SUCK off valve?
Just askin. :D
S
Just askin. :D
S
07-11-2005, 01:38 PM
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Originally Posted by Rx-A-Ho
I appologize for my spelling errors. Your superiority is obvious and overwhelming. Thank you for the value you added to my education.
________
M103 ENGINE
Last edited by PUR NRG; 05-01-2011 at 06:27 AM.
07-11-2005, 05:46 PM
#21
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Originally Posted by StealthTL
....if you put one on the intake of a 'normal' car, would that make it a SUCK off valve?
Just askin. :D
S
Just askin. :D
S
07-11-2005, 06:06 PM
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BOV Sound without a Turbo? Of course it's possible!!! Just not with a BOV attached to your intake though... It's called http://www.sunamiturbo.com/
LOL!!!
LOL!!!
07-11-2005, 07:42 PM
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^ Yeah, no kidding. Up next is a RWD burnout smoke creator gadget for the poor FWD rice rockets. All you have to do is rev it in neutral and the smokes will come out the rear wheels :D
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