BPV benefits?

[Turbojuice]

Hey everyone, I looked around on the forums, and couldn't find a whole lot of information on this...

What are the benefits/drawbacks of a BPV? I am looking at getting the Forge bypass valve.

Will it put more strain on my engine/turbo, or will it make them last longer?

If anyone knows of a thread regarding the same topic, please send it my way, I don't mean to repost an old thread.

 

[XoX1de]

BPV is the stockish setup, you recirculate. and you dont hear the pshhh sound. BOV is the valve vent to atmosphere which u hear pshhh. BOV can make car stall if maf isnt relocated. Otherwise they are.. almost same..

 

[Turbojuice]

Ya I know that much. Just wondering what the benefits to performance and engine life are.

 

[Viralphrame]

Ya I know that much. Just wondering what the benefits to performance and engine life are.

Your car already has a BPV installed. The Forge unit is a direct replacement piece. If you look at the outlet near the crest of the hotpipe and follow the black silicone hose to the intake tube, you'll find the stock black BPV sitting there.

The BPV's advantage over a BOV is that you don't lose any air that has been already metered by the MAF, and you won't have to deal with stalling due to rich conditions.

 

[Gothkid]

when u have a BOV, is there anyway to avoid this? this is on a diff car, but the concept is the same. the BOV is causing occasional stalling. not very often, but if u run it hard then let off, it blows off and u hear it sputter.

 

[Viralphrame]

when u have a BOV, is there anyway to avoid this? this is on a diff car, but the concept is the same. the BOV is causing occasional stalling. not very often, but if u run it hard then let off, it blows off and u hear it sputter.

The only remedy available to us in order to attempt to correct the stalling issue is relocating the MAF sensor to an area on the cold pipe before the throttle body. That way, any air leaving the charge on its way to the throttle body prior to the MAF won't have an adverse affect since the MAF wouldn't have metered it yet.

Personally I'm not too fond of relocating the MAF sensor because of how sensitive it is to intake turbulence.

 

[Gothkid]

well, this is on a 1990 volvo 780 bertone with an HX-35 Turbo and a HKS super sequential. the BOV is on the pressure pipe between the tb and the IC. the MAF is between the air filter and the turbo.

 

[Viralphrame]

well, this is on a 1990 volvo 780 bertone with an HX-35 Turbo and a HKS super sequential. the BOV is on the pressure pipe between the tb and the IC. the MAF is between the air filter and the turbo.

That's how the MSP's stock turbo system is set up. Instead of a BOV, though, the BPV is mounted between the hotpipe and the intake tube.

Also, I've never even seen under the hood of a Volvo 780, though, so do anything at your own risk.. lol.

 

[Gothkid]

lol, 22psi 75lb injectors and a whole lotta OH SHI......................

its fast, and forged, so i think were ok, just stalls every now and then.

 

[Viralphrame]

lol, 22psi 75lb injectors and a whole lotta OH SHI......................

its fast, and forged, so i think were ok, just stalls every now and then.

Haha, oh wow. Well, feel free to relocate the MAF and see if you notice a difference.

Here's a picture to illustrate what I'm talking about:

 

[pavone]

i would say benefit of a bpv would be that it takes air thats already been compressed and through the filter and puts it right back into the system. i feel as though they are not as quick as most bov out there but i could be completely wrong. most bov have a bigger inlet/outlet so they can expel air quicker and faster, boostsciences rdv kinda matches it with the 1" in and outlet. but yea, as fair as air leaving the system most bovs are around 1.25 or at least 1"...confusing yes. got to the point? not really kinda sorta lol

 

[Turbojuice]

haha got it.

So they shouldn't cause any damage to the engine with daily driving use? (Daily driving is around 8k miles/year for me)

 

[Viralphrame]

haha got it.

So they shouldn't cause any damage to the engine with daily driving use? (Daily driving is around 8k miles/year for me)

Like I said.. your car already has a BPV on it. You'll be fine.

 

[Turbojuice]

Awesome. Just want to be sure.

 

[HondaEat-R]

Recirculating with a proper sized hose will result in a slightly faster spool / less lag. I run relocated MAF w/ VTA, but I may go back to recirc soon....seems smarter.

 

[03MSP-JH]

i have a turboxs bov VTA with my MAF relocated for about 10k and its fine..

 

[Laser Blue]

Your car already has a BPV installed. The Forge unit is a direct replacement piece. If you look at the outlet near the crest of the hotpipe and follow the black silicone hose to the intake tube, you'll find the stock black BPV sitting there.

The BPV's advantage over a BOV is that you don't lose any air that has been already metered by the MAF, and you won't have to deal with stalling due to rich conditions.

I replaced the stock BPV with the Forge BPV (in black... very sleeper). The difference is discernible. It holds boost much better. I can't say whether this would be the case if the stocker was brand new, but mine had only 32k on it. I def have the "turkey", but am gonna try going to 1" hose and nipples on hotpipe and SRI to see if it kills the turkey. If not, I may change to the Boost Sciences RDV. For me, its all about some performance gains without relocating the MAF and while still running the stock ECU... trying to avoid some of the other problems I read about here.

 

[Outlawstar98]

bpv is good cause it pushes already compressed and coldes air back into the intake, bov does not, is it better then a bov? Yes/no no one fully knows.

 

[Viralphrame]

I replaced the stock BPV with the Forge BPV (in black... very sleeper). The difference is discernible. It holds boost much better. I can't say whether this would be the case if the stocker was brand new, but mine had only 32k on it. I def have the "turkey", but am gonna try going to 1" hose and nipples on hotpipe and SRI to see if it kills the turkey. If not, I may change to the Boost Sciences RDV. For me, its all about some performance gains without relocating the MAF and while still running the stock ECU... trying to avoid some of the other problems I read about here.

That's good that you're going to get larger fittings for the hotpipe and intake, but if you retain the Forge unit you will still be trying to push the air through a 19mm/three-quarter inch diaphragm-type valve. After you get the larger fittings, just go ahead and buy the RDV. Run a dedicated vacuum line to the RDV and be done with it.

bpv is good cause it pushes already compressed and coldes air back into the intake, bov does not, is it better then a bov? Yes/no no one fully knows.

The BPV inlet comes from the hotpipe, so no, it does not push colder air back into the intake. As I've stated before, a fully recirculated BPV maintains the correct amount of air in the intake system that has already been measured by the MAF sensor. As we all know, subtracting air from the system will create a rich condition, and adding air will create a lean condition. It's a very simple principle.

 

[Turbojuice]

I replaced the stock BPV with the Forge BPV (in black... very sleeper). The difference is discernible. It holds boost much better. I can't say whether this would be the case if the stocker was brand new, but mine had only 32k on it. I def have the "turkey", but am gonna try going to 1" hose and nipples on hotpipe and SRI to see if it kills the turkey. If not, I may change to the Boost Sciences RDV. For me, its all about some performance gains without relocating the MAF and while still running the stock ECU... trying to avoid some of the other problems I read about here.

Is the turkey sound common in the Forge BPV? I have heard it on their BOV's a lot, but on their BPVs I hear more of the "clashing swords" sound...?