No bypass valve or blow off valve temporarily okay or not?
04-19-2018, 01:51 PM
#1
New Member
Thread Starter
No bypass valve or blow off valve temporarily okay or not?
Alright so I know I’ll probably get some hate for this but would it be fine to put a bypass valve block off plate to get that turbo flutter noise? I found one thread on this when looking around where someone said they ran it like this and never had a problem but that’s one person so I don’t wana go off of what one person said. I say temporarily because I’d like to do this for an upcoming car meet because hey it’s a car meet and I wana show off my car, but to me it’s not worth it if it will damage my car that’s why I’m asking for any input on this. I would of course not be going full throttle if I were to do this just some small little pulls and would install the bypass back the next day. Again any feedback is appreciated
04-19-2018, 10:09 PM
#5
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Thread Starter
I honestly had no idea you could get that fluttering with a bov any specific brand that does this and honestly it all comes down to personal preference personally I love the sound
04-20-2018, 06:08 AM
#8
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04-20-2018, 01:44 PM
#10
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04-20-2018, 03:00 PM
#11
the Tial bov dont matter how much boost you're running. it matters vacuum.
http://tialsport.com/documents/w3_tial_qqr_sp.pdf
http://tialsport.com/documents/w3_tial_qqr_sp.pdf
04-20-2018, 08:32 PM
#12
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Thread Starter
the Tial bov dont matter how much boost you're running. it matters vacuum.
http://tialsport.com/documents/w3_tial_qqr_sp.pdf
http://tialsport.com/documents/w3_tial_qqr_sp.pdf
04-21-2018, 08:24 AM
#15
Originally Posted by ECaulk
Surge and flutter (what the OP wants) are completely different, and occur at different times. Flutter does no damage
04-21-2018, 09:07 AM
#16
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from what I’ve read it is differnt I took this from another thread
First of all, Compressor surge is defined as a turbo that pushes more compressed air than the Head can flow. This causes a backlash or "surge" of compressed air pushing back on the turbo CHRA and can kill turbos
Turbo "flutter" or the noise that people like, is due to the throttle body being closed and compressed air being pushed back into the turbo which chops the air. this is almost the same as compressor surge, except that the load is different.
So from what I’ve read from this thread and other places it’s not the same I’ve also read that running no bov use to be harmful back when turbos used bushing but modern turbos using bearing so it doesn’t cause the turbo any harm and it’s fine
First of all, Compressor surge is defined as a turbo that pushes more compressed air than the Head can flow. This causes a backlash or "surge" of compressed air pushing back on the turbo CHRA and can kill turbos
Turbo "flutter" or the noise that people like, is due to the throttle body being closed and compressed air being pushed back into the turbo which chops the air. this is almost the same as compressor surge, except that the load is different.
So from what I’ve read from this thread and other places it’s not the same I’ve also read that running no bov use to be harmful back when turbos used bushing but modern turbos using bearing so it doesn’t cause the turbo any harm and it’s fine
04-21-2018, 09:19 AM
#17
Senior Member
iTrader: (6)
Think about that for a second, a mass spinning rapidly in one direction suddenly spinning backwards, its ludacris from a physics standpoint. The sound is the turbine chopping the air. Low pressure flutter is not an issue.
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user 72239 (04-21-2018)
04-21-2018, 11:44 AM
#18
from what I’ve read it is differnt I took this from another thread
First of all, Compressor surge is defined as a turbo that pushes more compressed air than the Head can flow. This causes a backlash or "surge" of compressed air pushing back on the turbo CHRA and can kill turbos
Turbo "flutter" or the noise that people like, is due to the throttle body being closed and compressed air being pushed back into the turbo which chops the air. this is almost the same as compressor surge, except that the load is different.
So from what I’ve read from this thread and other places it’s not the same I’ve also read that running no bov use to be harmful back when turbos used bushing but modern turbos using bearing so it doesn’t cause the turbo any harm and it’s fine
04-21-2018, 12:18 PM
#19
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04-21-2018, 12:57 PM
#20
Originally Posted by ECaulk
Think about that for a second, a mass spinning rapidly in one direction suddenly spinning backwards, its ludacris from a physics standpoint. The sound is the turbine chopping the air. Low pressure flutter is not an issue.
04-21-2018, 02:36 PM
#22
Compressor surge = turbo
Flutter = wastegate or bov
Never heard of turbo "flutter". Sounds dumb. All the diesel Bros with their horrible compressor surge. Sounds terrible bad for turbo
Compressor surge does happen when throttle is chopped with no bypass / bov. It's very bad for the turbo common guys. this is the whole point of having a bypass or bov
Flutter = wastegate or bov
Never heard of turbo "flutter". Sounds dumb. All the diesel Bros with their horrible compressor surge. Sounds terrible bad for turbo
Compressor surge does happen when throttle is chopped with no bypass / bov. It's very bad for the turbo common guys. this is the whole point of having a bypass or bov
04-21-2018, 02:42 PM
#23
04-21-2018, 03:35 PM
#24
The surge region, located on the left-hand side of the compressor map (known as the surge line), is an area of flow instability typically caused by compressor inducer stall. The turbo should be sized so that the engine does not operate in the surge range. When turbochargers operate in surge for long periods of time, bearing failures may occur. When referencing a compressor map, the surge line is the line bordering the islands on their far left side. Compressor surge is when the air pressure after the compressor is actually higher than what the compressor itself can physically maintain. This condition causes the airflow in the compressor wheel to back up, build pressure, and sometimes stall. In cases of extreme surge, the thrust bearings of the turbo can be destroyed, and will sometimes even lead to mechanical failure of the compressor wheel itself. Common conditions that result in compressor surge on turbocharger gasoline engines are:
-A compressor bypass valve is not integrated into the intake plumbing between the compressor outlet and throttle body
-The outlet plumbing for the bypass valve is too small or restrictive
-The turbo is too big for the application
-A compressor bypass valve is not integrated into the intake plumbing between the compressor outlet and throttle body
-The outlet plumbing for the bypass valve is too small or restrictive
-The turbo is too big for the application
04-21-2018, 04:42 PM
#25
are you dumb?
1st. the whole point of a BPV is for emissions and most people dont like that noise. MAF tuned cars need the air recirc'd back to the intake.
2. It is 100% fine for turbo. My OEM BPV fluttered in 5th gear in my Cobalt, it flutters in my Subaru. no BPV can vent the air fast enough.
1st. the whole point of a BPV is for emissions and most people dont like that noise. MAF tuned cars need the air recirc'd back to the intake.
2. It is 100% fine for turbo. My OEM BPV fluttered in 5th gear in my Cobalt, it flutters in my Subaru. no BPV can vent the air fast enough.