Bov
- Thread starter JasonH
- Start date
Wouldnt they want an atmospheric valve. There shouldnt be a reason to change it if is going to recirculate the pressure. I think they want the sound. Anyone with expertise, please explain. I would love to get an atmospheric valve for my cousins MSP.
With the right valve you will still get plenty of noise. Like I stated in numerous other posts on the BOV subject, a car designed with a recirculating valve that is plumbed back into the intake will stumble and hesitate due to the fact that un-metered air is not accounted for in the ecu's programming.
It will cause problems in the long run. Only way to fix it is to run a Blue-face SAFC, or aftermarket engine management with a MAP sensor.
It will cause problems in the long run. Only way to fix it is to run a Blue-face SAFC, or aftermarket engine management with a MAP sensor.
Greddy type S BOV's are compatible with our ECU's and can vent into the atmosphere wothout any idle issues. We sell them with our kits and they have had no problems.
However some BOV's like apexi and blitz do do not well with our cars. If you guys with MSP 's need any info regarding this just hit me with a PM and I can help you out.
However some BOV's like apexi and blitz do do not well with our cars. If you guys with MSP 's need any info regarding this just hit me with a PM and I can help you out.
twiztedjeckel
Member
- :
- '04 SVT Focus
what an HKS SS BOV?
APEXistud said:
Click Here and you'll see/hear it.
You will need QuickTime 5 or Windows Media Player 7 (XP) to see it.
twiztedjeckel
Member
- :
- '04 SVT Focus
so whats the good word? anybody know if a HKS SS blow off valve can be mounted or fitted to our cars yet? cause if so i really like those and the way it sounds
My VW 1.8T had a similar setup to these, and lot of people replaced them because the stock part was weak and often failed under increased boost. We called it a Diverter Valve (DV), it serves the same function as a Blow Off Valve (BOV), it just vents the excess boost differently.
DV's are used on cars that have Mass Airlfow Sensors that measure all the incoming air, which is used to calculate the correct amount of fuel to use. It's important to not vent out air that's already been measured because then your air-fuel ratio gets off, and bad things start to happen!
No matter what a company says, unless they do some engine computer upgrades, a BOV is not going to work properly. It's just the nature of the thing. There are a lot of valves out there that offer both functions, you just have to make sure you install them correctly so you don't accidententally leave it in BOV mode.
It's true that because a DV routes the air back into your intake piping, you don't often hear them. I couldn't hear my VW's at all, until I put on a CAI. Then it was just as loud as most BOV's, it was fun to scare pedestrians with...
I have not yet heard of any rampant problems with the MSP's stock DV's, so if noise is all you are looking for, it may be better to put on a different intake instead of messing with the valve. A free flowing intake lets more air in, and more noise out, so it will make a big difference.
That being said, I swear I can hear the DV in my new MSP. The car isn't broken it yet so I haven't really gotten on the gas, but when I am accelerating quickly I'm positive I can hear a little release from the front drivers side, right where the intake is when I shift. I can't wait to break in my car so I can find out if that's what I'm actually hearing or not...
Anyway, I hope this helps explain some things. If you ever want to learn all that you possibly can about DV's, head over to vwvortex.com and read through the 1.8T forums.
DV's are used on cars that have Mass Airlfow Sensors that measure all the incoming air, which is used to calculate the correct amount of fuel to use. It's important to not vent out air that's already been measured because then your air-fuel ratio gets off, and bad things start to happen!
No matter what a company says, unless they do some engine computer upgrades, a BOV is not going to work properly. It's just the nature of the thing. There are a lot of valves out there that offer both functions, you just have to make sure you install them correctly so you don't accidententally leave it in BOV mode.
It's true that because a DV routes the air back into your intake piping, you don't often hear them. I couldn't hear my VW's at all, until I put on a CAI. Then it was just as loud as most BOV's, it was fun to scare pedestrians with...
I have not yet heard of any rampant problems with the MSP's stock DV's, so if noise is all you are looking for, it may be better to put on a different intake instead of messing with the valve. A free flowing intake lets more air in, and more noise out, so it will make a big difference.
That being said, I swear I can hear the DV in my new MSP. The car isn't broken it yet so I haven't really gotten on the gas, but when I am accelerating quickly I'm positive I can hear a little release from the front drivers side, right where the intake is when I shift. I can't wait to break in my car so I can find out if that's what I'm actually hearing or not...
Anyway, I hope this helps explain some things. If you ever want to learn all that you possibly can about DV's, head over to vwvortex.com and read through the 1.8T forums.
Mike some excellent stuff there
I know for a fact that HKS ssq leak at idle on our cars and often have some problems ect.
The Greddy valves are excellent units and are on 11 turbo MP3's currently with NOOOO problems. You just have to adjust them and they work fine. I am not to fond of turbo XS products and we put the super loud BOV on our WRX initially and iy sounded like s***. So know we pretty much use greddy exclusivley
I know for a fact that HKS ssq leak at idle on our cars and often have some problems ect.
The Greddy valves are excellent units and are on 11 turbo MP3's currently with NOOOO problems. You just have to adjust them and they work fine. I am not to fond of turbo XS products and we put the super loud BOV on our WRX initially and iy sounded like s***. So know we pretty much use greddy exclusivley
DV = Diverter Valve = By-pass Valve = Recirculating Valve
BOV = Blow-off Valve = Atmospheric Venting
Of the 11 Turbo MP3's out there, what are they running for fuel/ignition management? I know anyone can take a Blue-Face S-AFC and use it to solve the problems that arise from a BOV.
Anything stock using the MAF or VAF system will need a Bypass Valve like TurboXS has to work normally without problems. I don't beleive in "tweaking" a BOV like the GReddy Type S so that you can still vent to Atmosphere just for the sound, if it wasn't designed for the application it will only lead to hassle down the road.
BOV = Blow-off Valve = Atmospheric Venting
Of the 11 Turbo MP3's out there, what are they running for fuel/ignition management? I know anyone can take a Blue-Face S-AFC and use it to solve the problems that arise from a BOV.
Anything stock using the MAF or VAF system will need a Bypass Valve like TurboXS has to work normally without problems. I don't beleive in "tweaking" a BOV like the GReddy Type S so that you can still vent to Atmosphere just for the sound, if it wasn't designed for the application it will only lead to hassle down the road.
