Is a recirculating BOV better?
Vent to Atmosphere (VTA) blow off valves release the pressure buildup by allowing the excess pressure to vent outward instead of back into the engine. Not all BOV’s are noisy, but for those wanting a quiet turbo for either aesthetic or due to state regulations on noise levels, a recirculating BOV is the better choice.
How does a recirculating BOV work?
A recirc valve does a very similar job to a blow off valve, the key difference is that a recirc valve recirculates the excess pressure back into the intake, instead of out into the atmosphere. This, in turn, helps your turbo setup retain psi level better between shifts, and gets rid of turbo flutter.
Does a BOV cause power loss?
Will it make you lose power to vent? Probably not. But you ARE losing metered air, and thus, your car will run richer, which can probably make you lose a little performance. Some people have had issues with stalling when they shift because of venting their BOV to atmosphere.
Can you get turbo flutter with a BOV?
With an aftermarket BOV fitted some non-detrimental low rpm fluttering does characterise certain cars (as mentioned above) particularly where a larger turbo and intercooler have been fitted. It’s perfectly safe to set your BOV up to cause some low-rpm flutter, as long as it vents with a whoosh at high-rpm and boost.
Does a recirculating valve make noise?
The short answer is that there is no blow-off valve that makes this noise. Car manufacturers fit recirculating (plumb back) BOVs to give the pressurised air an alternate path when the throttle is closed: back into the turbo compressor inlet. This eliminates the ‘undesirable in a brand-new car’ fluttering noise.
What’s the difference between a BOV and a BPV?
All you need to remember is that a BOV vents all the excess pressure to the atmosphere, an adjustable BOV vents some of the extra boost pressure to the atmosphere and some of it back into the intake system, and a BPV vents all the excess pressure back into the intake before the turbocharger.
Does a recirculating BOV make noise?
Yes it will go whaa chhhhh, just quieter.
Is a BOV worth it?
Performance-wise, BOVs can have a slight negative affect in applications such as drifting. When you’re on and off the throttle all the time, releasing all the charged air can hurt throttle response and give some lag. But as a general rule, you’re better off having one.
Can a BOV get wet?
BOV is ok to get wet. just watch all the electrical stuff. also dont get your air filter wet because it takes forever to dry and the turbo takes a REALLY long time to spool when its soaked.
Why is turbo flutter bad?
When the compressed air has nowhere to go, it causes the turbo rotational speed to rapidly drop, and attempts to push against the wheel. This can cause premature wear on your turbo, however closed throttle flutter on modern turbochargers is unlikely to cause a noticeable drop in turbocharger lifespan.
Why does my turbo flutter when I accelerate?
That fluttering noise is the sound of a turbo operating in compressor surge, as the compressor ‘chops’ through the air rather than pushing the air into the engine. To do this, it opens as quickly as it can when there is a rapid change in engine load from boost to vacuum — such as when a throttle plate closes.
Where does a recirculating valve go?
The recirculation valve is operated from the depression in the air inlet, upstream of the turbo and downstream of the throttle valve.