People... BlowOff valves are used on engine that use a map sensor for calculating air flow... DV(Diverter Valve) is used on vehicle with Mass Air Flow sensors. The differense is that if you blow off the air on MAF engine, It will give the ECM a false reading of extra air going into the angine making it run RICH.
MAP sensor calculates air after the DV/BO valve so it doesnt realy matter.
@ChristianoMoe Think you'll find that air pressure stopping the compressor turning whilst the exhaust gas is trying to drive the turbine is harmful to any turbo. High inlet pressure also causes engine damage (detonation etc). So i doubt you will find a turbo engine without an atmospheric/recirculating BOV (vents inlet air pressure and keeps the turbo spinning freely) and/or a waste gate (Vents exhaust gas to slow the turbine, in turn slowing the compressor and reducing inlet manifold pressure).
Audi VW cars with the 1.8T VAG engines dont like blow of valves, they need the air recirculated back into the engine. The forge splitter is a hybrid that is ok for these cars but a fully atmospheric one will fuck up the engine. and i do think this is compressor surging. mine did it too when i had the remap and the standard diverter valve. got the forge splitter now and no more surge. a nice hiss instead.
a bov is on EVERY single turbo car out there, if that was case, there wouldn't be such thing as compressure surge. Compressor surge is when the turbo goes into the opposite direction. BOV placement could be a key role in reducing compressor surge, or running it in Recirculation.
You're right, but then they convert over to BOV to alleviate those issues with compressor surge. A lot of Vdub owners use the DValve until they upgrade to a bigger turbo.
yeah by the time a bt upgrade is done they are running standalone ecu's and can accomodate bov's if they desire. i've seen and know a few vdub owners running bt setups with a dv and no issues.
Compressor surge on VWs is caused by issues with the wastegate and/or the wastegate control solenoid valve (n75). A diverter valve is used instead of a blow-off valve because it's quieter, but it's also cleaner to operate over the long term.
isnt it bad you have placed a cone filter? i read that these engines 1.8 20vt work better with cone filter on big turbo upgrades like vf34,gt28rs,gt3071r and stuff like that..
THAT SOUNDS SOOO GOOD, AND WHO DOESNT KNOW THAT FLUTTER SOUND IS ACTUALLY COMING FROM THE INTAKE FILTER, AFTER GAS IS RELEASED
theIchosenIone 9 months ago
DyeSM1 Would you like to clerify? Or is name calling all you can do?
csstaticx 1 year ago
@csstaticx i think he was a little confused on your wording. You make it sound like BOV's are used for measuring air.
bsmit389 1 year ago
People... BlowOff valves are used on engine that use a map sensor for calculating air flow... DV(Diverter Valve) is used on vehicle with Mass Air Flow sensors. The differense is that if you blow off the air on MAF engine, It will give the ECM a false reading of extra air going into the angine making it run RICH.
MAP sensor calculates air after the DV/BO valve so it doesnt realy matter.
csstaticx 1 year ago 2
@csstaticx your an idiot.
DyeSM1 1 year ago
this engine wont last long
bsmit389 1 year ago
Compressor surge is harmful to small turbos like the ko3 and k04. Bigger turbos doesn't get any damage to the turbo blades.
To those who think that surge is bad for all turbo-cars: You don't know shit.
ChristianoMoe 2 years ago
@ChristianoMoe Think you'll find that air pressure stopping the compressor turning whilst the exhaust gas is trying to drive the turbine is harmful to any turbo. High inlet pressure also causes engine damage (detonation etc). So i doubt you will find a turbo engine without an atmospheric/recirculating BOV (vents inlet air pressure and keeps the turbo spinning freely) and/or a waste gate (Vents exhaust gas to slow the turbine, in turn slowing the compressor and reducing inlet manifold pressure).
Dabbzle 1 year ago
Audi VW cars with the 1.8T VAG engines dont like blow of valves, they need the air recirculated back into the engine. The forge splitter is a hybrid that is ok for these cars but a fully atmospheric one will fuck up the engine. and i do think this is compressor surging. mine did it too when i had the remap and the standard diverter valve. got the forge splitter now and no more surge. a nice hiss instead.
G19RPS 3 years ago 2
is this is compressor surge or not?
i know surge is not good for the Turbo....
a3tdiquattro 3 years ago
Umm accually not every turboed car has a BOV.. Euros use Diverter Valves or Splitter Valves.
1caneoner1 3 years ago
a bov is on EVERY single turbo car out there, if that was case, there wouldn't be such thing as compressure surge. Compressor surge is when the turbo goes into the opposite direction. BOV placement could be a key role in reducing compressor surge, or running it in Recirculation.
sdc1213 3 years ago
my car (and almost every other vw,audi porsche,etc) doesnt have a bov. it has a diverter valve. actually most car do from the factory.
furryroadkill 3 years ago
You're right, but then they convert over to BOV to alleviate those issues with compressor surge. A lot of Vdub owners use the DValve until they upgrade to a bigger turbo.
sdc1213 3 years ago
yeah by the time a bt upgrade is done they are running standalone ecu's and can accomodate bov's if they desire. i've seen and know a few vdub owners running bt setups with a dv and no issues.
furryroadkill 3 years ago
Compressor surge on VWs is caused by issues with the wastegate and/or the wastegate control solenoid valve (n75). A diverter valve is used instead of a blow-off valve because it's quieter, but it's also cleaner to operate over the long term.
cookiehead2 3 years ago
isnt it bad you have placed a cone filter? i read that these engines 1.8 20vt work better with cone filter on big turbo upgrades like vf34,gt28rs,gt3071r and stuff like that..
Tzefri84 3 years ago
I wouldn't be worried about the cone filter, I'd be more worried about the compressor surge.
sdc1213 3 years ago
if he has a bov doesnt he avoid the surge?
Tzefri84 3 years ago