best blow off whats best ?
Newbie
Joined: May 2015
Posts: 49
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From: Evo 5
That flutter is the sound of your turbine crying for help (pressure build up/forced release of BOV over and over). You're slamming the door shut on a compressor that is moving enough CFM to create 25psi of pressure at high RPM.
I have an old, snapped CHRA to prove it.
It sounded great until the turbo died LOL. When I checked the DV, I found the nipple bent down, not really allowing the valve to vent. Muh bad. LOL
I would highly suggest tuning your valve properly. Just my opinion, though.
I have an old, snapped CHRA to prove it.
It sounded great until the turbo died LOL. When I checked the DV, I found the nipple bent down, not really allowing the valve to vent. Muh bad. LOL
I would highly suggest tuning your valve properly. Just my opinion, though.
And shafts snap all the time for many reason. How can you be sure? I could easy point you to some examples of shafts snapping in cars with bovs. Does that mean running a bov snaps shafts too?
Anyway enough of this debate. Debating over the Internet is pointless. Only one disadvantage of running no bov is crusing throttle sensitivity, if you say press the gas a tiny bit to speed up then back your foot off the gas it can be a tiny bit jerky. Most of time I can barely notice it, passengers don't feel it only hear the vutututu sound.
I'm not saying go out there now and remove it but now if your considering it that's my experience
Last edited by Dave123456789; Jun 27, 2015 at 04:04 PM.
I have removed the bov so it's definitely not the sound of a bov fluttering now. The turbo barely slows down, might get a tiny bit of side loading but your getting that anyway when your throwing pressure in a pipe.
And shafts snap all the time for many reason. How can you be sure? I could easy point you to some examples of shafts snapping in cars with bovs. Does that mean running a bov snaps shafts too?
Anyway enough of this debate. Debating over the Internet is pointless. Only one disadvantage of running no bov is crusing throttle sensitivity, if you say press the gas a tiny bit to speed up then back your foot off the gas it can be a tiny bit jerky. Most of time I can barely notice it, passengers don't feel it only hear the vutututu sound.
I'm not saying go out there now and remove it but now if your considering it that's my experience
And shafts snap all the time for many reason. How can you be sure? I could easy point you to some examples of shafts snapping in cars with bovs. Does that mean running a bov snaps shafts too?
Anyway enough of this debate. Debating over the Internet is pointless. Only one disadvantage of running no bov is crusing throttle sensitivity, if you say press the gas a tiny bit to speed up then back your foot off the gas it can be a tiny bit jerky. Most of time I can barely notice it, passengers don't feel it only hear the vutututu sound.
I'm not saying go out there now and remove it but now if your considering it that's my experience
Your post is....astonishing. I sincerely hope nobody takes your advice.
Who filled your head with this idea, anyway??
Even SuperStreet knows:
http://www.superstreetonline.com/how-to/engine/sstp-1211-blow-off-valves-explained/
Last edited by kaj; Jun 27, 2015 at 05:36 PM.
Newbie
Joined: May 2015
Posts: 49
Likes: 0
From: Evo 5
Then it's your wastegate being forced open. Do you understand why diverter valves are installed? It's because all that air is instantly stopped at the throttle body which stops your turbine and puts a great deal of force on it. The DV is there to save your parts and keep the turbo spinning and working as efficiently as possible.
Your post is....astonishing. I sincerely hope nobody takes your advice.
Who filled your head with this idea, anyway??
Even SuperStreet knows:
http://www.superstreetonline.com/how-to/engine/sstp-1211-blow-off-valves-explained/
Your post is....astonishing. I sincerely hope nobody takes your advice.
Who filled your head with this idea, anyway??
Even SuperStreet knows:
http://www.superstreetonline.com/how-to/engine/sstp-1211-blow-off-valves-explained/
Impossible to stop your turbo spinning, it may slow slightly but probably as much as a normal vta bov would between shifts. That vutututu sound is the comp wheel chopping through air, you do know your exhaust gas is spinning the turbo with far more force than what the excess air in the intake can manage to slow the turbo
It is also more efficient to run no bov and still have a large amount of positive pressure in the intake pipes than running a vta and having to build that boost again from nothing.
Your "knowledge" on how a waste gate works and how you can stop a turbo by running no bov makes all your opinions null and void. I'm sorry but you don't know ****.
Have you ever run no bov? If you haven't keep your opinion to yourself. Many cars from factory run no bov and most companies use a recirculating bov to keep the "unwanted" noise to a minimum.
Last edited by Dave123456789; Jun 27, 2015 at 06:34 PM.
Um it's definitely not my waste gate being opened, do you know what a waste gate does? Mine only opens when I max boost, so it's open while I'm gunning it, then I shift, off the throttle so waste gate closes, compressor flutters then I'm back on the gas waste gate all open and screaming again.
Impossible to stop your turbo spinning, it may slow slightly but probably as much as a normal vta bov would between shifts. That vutututu sound is the comp wheel chopping through air, you do know your exhaust gas is spinning the turbo with far more force than what the excess air in the intake can manage to slow the turbo
It is also more efficient to run no bov and still have a large amount of positive pressure in the intake pipes than running a vta and having to build that boost again from nothing.
Your "knowledge" on how a waste gate works and how you can stop a turbo by running no bov makes all your opinions null and void. I'm sorry but you don't know ****.
Have you ever run no bov? If you haven't keep your opinion to yourself. Many cars from factory run no bov and most companies use a recirculating bov to keep the "unwanted" noise to a minimum.
Impossible to stop your turbo spinning, it may slow slightly but probably as much as a normal vta bov would between shifts. That vutututu sound is the comp wheel chopping through air, you do know your exhaust gas is spinning the turbo with far more force than what the excess air in the intake can manage to slow the turbo
It is also more efficient to run no bov and still have a large amount of positive pressure in the intake pipes than running a vta and having to build that boost again from nothing.
Your "knowledge" on how a waste gate works and how you can stop a turbo by running no bov makes all your opinions null and void. I'm sorry but you don't know ****.
Have you ever run no bov? If you haven't keep your opinion to yourself. Many cars from factory run no bov and most companies use a recirculating bov to keep the "unwanted" noise to a minimum.
Last edited by kaj; Jun 27, 2015 at 09:01 PM.
Um it's definitely not my waste gate being opened, do you know what a waste gate does? Mine only opens when I max boost, so it's open while I'm gunning it, then I shift, off the throttle so waste gate closes, compressor flutters then I'm back on the gas waste gate all open and screaming again.
Impossible to stop your turbo spinning, it may slow slightly but probably as much as a normal vta bov would between shifts. That vutututu sound is the comp wheel chopping through air, you do know your exhaust gas is spinning the turbo with far more force than what the excess air in the intake can manage to slow the turbo
It is also more efficient to run no bov and still have a large amount of positive pressure in the intake pipes than running a vta and having to build that boost again from nothing.
Your "knowledge" on how a waste gate works and how you can stop a turbo by running no bov makes all your opinions null and void. I'm sorry but you don't know ****.
Have you ever run no bov? If you haven't keep your opinion to yourself. Many cars from factory run no bov and most companies use a recirculating bov to keep the "unwanted" noise to a minimum.
Impossible to stop your turbo spinning, it may slow slightly but probably as much as a normal vta bov would between shifts. That vutututu sound is the comp wheel chopping through air, you do know your exhaust gas is spinning the turbo with far more force than what the excess air in the intake can manage to slow the turbo
It is also more efficient to run no bov and still have a large amount of positive pressure in the intake pipes than running a vta and having to build that boost again from nothing.
Your "knowledge" on how a waste gate works and how you can stop a turbo by running no bov makes all your opinions null and void. I'm sorry but you don't know ****.
Have you ever run no bov? If you haven't keep your opinion to yourself. Many cars from factory run no bov and most companies use a recirculating bov to keep the "unwanted" noise to a minimum.
You absolutely have to run some sort of diverter or blow off valve, or you are begging to blow up a turbo. Without a blow off valve, when the throttle plate shuts, all of the air in the charge pipes has to go somewhere, either out the blow off valve (which you don't have), or backwards out of the turbo (compressor surge). In severe cases it WILL snap the turbine shaft. In less severe case it RAPIDLY slows the compressor while exhaust gases are still trying to spin the turbine, which puts a huge load on the bearing system in the CHRA, it can even make the turbo spin backwards momentarily.
The only vehicles that don't run a blow off or diverter valve are diesels that don't have throttles.
You are the one who has absolutely no idea what you're talking about.
You absolutely have to run some sort of diverter or blow off valve, or you are begging to blow up a turbo. Without a blow off valve, when the throttle plate shuts, all of the air in the charge pipes has to go somewhere, either out the blow off valve (which you don't have), or backwards out of the turbo (compressor surge). In severe cases it WILL snap the turbine shaft. In less severe case it RAPIDLY slows the compressor while exhaust gases are still trying to spin the turbine, which puts a huge load on the bearing system in the CHRA, it can even make the turbo spin backwards momentarily.
The only vehicles that don't run a blow off or diverter valve are diesels that don't have throttles.
You are the one who has absolutely no idea what you're talking about.
The only vehicles that don't run a blow off or diverter valve are diesels that don't have throttles.
You are the one who has absolutely no idea what you're talking about.
If you are planning to run a ton of boost, I'd probably go with aftermarket.
Just my opinion, though.
