Bov!!!!

[jmv]

My intake sounds more like pigeons rather than a turkey and is the intake really bad for the turbo? Why and how can I fix this?

its not that the intake is bad for the turbo, its just that the intake allows you to hear it more. It has to do with the design and the bpv not reacting quick enough, so air gets pushed back against the turbine blades (which are spinning VERY quickly the opposite direction), rather than all of it circulating back to the intake and flowing through the turbo the correct direction. Its called compressor surge.

I don't get any now that i've got my Boost Sciences BPV, along with larger bungs on my hardpipes and larger tubing (1" I.D.).

 

[knowledge007]

AFAIK, theres no good way to attatch a conventional (hks, etc) BOV with the stock plastic piping. I could be wrong on that though, i'm no expert.... i'm used to hardpipes so i've never looked into attatching a BOV to the plastic pipes.

I do know however, that it is VERY common to run a dual setup on the proteges... (bov and bpv). I don't think the MS3s need to do that because i believe they have a MAP sensor?? Regardless, running a dual setup is a long proven way to eliminate stalling issues on the protege. Search and you will find COUNTLESS sources for info.

And koolers, the way it works is to simply have a pipe with 2 fittings, one for a BOV and one for a hose to run to a bpv, and you hook both of them up. You don't need to relocate your MAF if you do this. Relocating the MAF is a method to avoid stalling if you DON'T have a dual setup.

If you would like to see my setup I have posted pics of the install on the "mazdaspeed3 cai" and the 2007 mazdaspeed3 cai is awesome" thread. Check it out when you get a chance.

 

[jmv]

If you would like to see my setup I have posted pics of the install on the "mazdaspeed3 cai" and the 2007 mazdaspeed3 cai is awesome" thread. Check it out when you get a chance.

i checked that out.... you said you have it recirculating right now. There wouldn't be any chance of stalling problems with a recirc setup, so no need to run a dual setup. Maybe i was incorrect in thinking the MS3s used a MAP sensor, i guess it was just that the guys running the BOV have been recircing it. And the way you hook it up to your engine won't work for ours.

 

[Wbriggs19061]

im confused...is this about an MSP or MS3?? i have a link to a picture diagram of dual valve setup in my sig.

edit..my bad its just the spots to tap..i have lots of pics if needed

 

[jmv]

i presume the original post was about an MSP, but it got sidetracked with people asking about the dual setup i guess.

 

[Wbriggs19061]

oh ok..yea i had my greddy type rs with hardpipes no bpv and no maf relocation and stalling nonstop unless i kept the rpms up..so i put the stock bpv in im looking to get an aftermarket diverter (sp?) valve here soon.

 

[mazdaspeeeeed]

with an intake you will hear more noise from your stock bpv (which means bypass valve, which will only recirculate, which is different from a bov, blow off valve, which vents to atmosphere). It will be a cyclic sound though. Lots of people get 'the turkey', which sounds kinda like a turkey gobble. Its actually kinda bad for your turbo and can cause damage over long periods of time, but there are people that like that sound. When i installed my AEM intake, i didn't get turkey but did have sort of a quick cyclic whoosh sound. Its kinda hard to describe. Now with my Boost Sciences reflex diverter valve, and an SRI, i get a nice even whoosh, but not nearly as pronounced or high pitched as if i had a BOV. To have a bov you're probably going to need hardpipes.... that is, metal pipes to replace those black plastic pipes going to and from the intercooler. Also worth noting is that just having a BOV will lead to stalling.... you either need to move the MAF post-BOV so you're not loosing metered air out of your BOV, or you need to run both the BOV and the stock BPV.

hope that helps.

dang... yea that helps! lol. so it's actually a lot more work then i thought... I dont want to get too crazy with this car since it is a daily driver. so I probably will continue to do research until i figure more out about it... .thanks for the help man!

 

[MrDiggler]

FWIW, I have a TurboXS Type-S BOV attached to stock piping. I get one hell of a racket from the BOV... very turkey-like, but with a killer howl. I don't think that I'm getting one bit of compressor surge, either. The BOV is set very sensitive, and will release with even the lightest throttle application and lift. I think my turkey comes from the plastic pipes. Flexible materials don't always release pressure smoothly. Sometimes the material oscillates on release, which is where I think the noise comes from. There's no way I'm getting any surge when the BOV releases so easily. I'll see if I can dig up a pic of how my Type-S is attached...

*edit* And I have to try pretty hard to get it to stall. This setup was actually like this when I bought the car with 8k miles, and I've never screwed with it except to clean the BOV. Obviously things will change when I install the Ion FMIC and get the new engine in. I still plan on running this BOV though, hopefully it can handle the flow from a Gt25/28 hybrid.

 

[jmv]

oh i see, the turboxs type s is attatched by a hose and not a flange....

 

[knowledge007]

i checked that out.... you said you have it recirculating right now. There wouldn't be any chance of stalling problems with a recirc setup, so no need to run a dual setup. Maybe i was incorrect in thinking the MS3s used a MAP sensor, i guess it was just that the guys running the BOV have been recircing it. And the way you hook it up to your engine won't work for ours.

I don't think there would be a way to run duals on the MS3's...??? I plan to go to v-to-a when I get the chip...???

 

[jmv]

I don't think there would be a way to run duals on the MS3's...??? I plan to go to v-to-a when I get the chip...???

well i'm sure you COULD run one if you got the pipes with the correct flanges and bungs and whatnot, but this is really beside the point.... thats for the MS3, which i don't know about, this guy was asking for the MSP....