Forge BPV question? Green Blue or Yellow Spring? No red?

[patty AT forge]

19psi with no boost controler?That dont sound right.You may have it to tight.We will see what other people think.

Having a valve too tight won't create more boost.

 

[Moxhair]

I hate bumping older threads, but rather that start a new one.. I just installed my forge BPV and I have absolutely zero sound. I have the stock airbox and I expected it to be subdued until my cobb intake gets here, but I have zero sound. I cannot tell if the BPV is working right.

again, Stock except the BPV, have tried the Yellow, blue, and blue with a shim.

Is this normal?

Any help would be much appreciated.

 

[Mid_Life_Crisis]

I've gradually raised it from blue to blue with 1 shim, and then 2 shims, and the valve seems to be working fine, no flutter nor surge. Peaked at 19 psi in the sixth gear.

Note "peaked". Many posters have recorded a high initial peak when they get on the gas. This is a spike until the boost control system brings it back in line. What does it settle in at and maintain?
Considering how inconsistent the quality of the parts Mazda gets from its various suppliers seems to be, I am not at all surprised that some guys are getting a minimal spike that settles right into the target range, while others get huge spikes that drop out to below target when the boost controller overcompensates. Reason enough to upgrade the BPV and wastegate actuator.

 

[MicaSp33d]

i originally had just the blue spring installed. When i add 1 shim it seems like the "ping" sound is lower now. This happen to anyone? Also just making sure, shim goes first then spring right??

 

[Mid_Life_Crisis]

i originally had just the blue spring installed. When i add 1 shim it seems like the "ping" sound is lower now. This happen to anyone? Also just making sure, shim goes first then spring right??

Yes, the shim goes inside the piston. Otherwise it will block the port on the cap.

 

[tru-boost]

I hate bumping older threads, but rather that start a new one.. I just installed my forge BPV and I have absolutely zero sound. I have the stock airbox and I expected it to be subdued until my cobb intake gets here, but I have zero sound. I cannot tell if the BPV is working right.

again, Stock except the BPV, have tried the Yellow, blue, and blue with a shim.

Is this normal?

Any help would be much appreciated.

you should hear a littlr something on the stock box.
to make sure the valve is working you can just open the air box and go for a short drive. you should hear it for sure that way.

 

[dronizm5]

Hey I just got my forge BPV for my MS3 and this may sound dumb but where do the shims go at the bottom of the BPV inside right?

 

[fructus]

After you open it, put the shims first, then the spring.

 

[Unkillable2]

just wondering... do most of you here recommand this valve? i have an injen CAI in already and the stock bpv is loud with whossh! i like the way it sound but i want something that hold boost better. and a lot of ppl say this valve is quiet, but is it even quieter than the stock one? how different would this valve sound compare to the stock one with an CAI? thx in advance!

 

[mazdaspeedster3]

It holds boost far better than the stock BPV, you will notice that right off the bat. It does however have a very specific sound to it that some like and some dont. If you are not all over boost it can sound very similar to stock. However, as boost climbs and the BPV recircs it is much louder and sounds (for lack of a better term) clanky. My wife has referred to it as two samarai ratts are under my hood clanking swords together... Go figure.

 

[Unkillable2]

so is it louder or quieter than the stock one? i want to make ppl turn there head lol oh and is the clanky or ping sound a good sign?

 

[mazdaspeedster3]

It is louder I think and a lot more distinct sounding. You are not running a BOV to atmosphere of course but it more than the stock sound.

 

[CWPspeed3]

It holds boost far better than the stock BPV, you will notice that right off the bat. It does however have a very specific sound to it that some like and some dont. If you are not all over boost it can sound very similar to stock. However, as boost climbs and the BPV recircs it is much louder and sounds (for lack of a better term) clanky. My wife has referred to it as two samarai ratts are under my hood clanking swords together... Go figure.

So your wife did notice it? What did she have to say about you getting it?

 

[mazdaspeedster3]

I just told her I switched springs so the car holds boost better, then I went into the whole explanation on how the turbo works with recirc and by the time I got even two sentences in she said she didnt care and wasnt listening any more anyway. LMAO!

 

[Unkillable2]

that's when you show her the back hand! lol

 

[mazdaspeedster3]

LMAO... Not sure about that. She is cool with the modding in moderation. So as long as she doesnt see the money missing or the interest rates I am good.

 

[CWPspeed3]

LMAO... Not sure about that. She is cool with the modding in moderation. So as long as she doesnt see the money missing or the interest rates I am good.

Haha good idea, thats what I usually do, just start talking technical talk and then you get tuned out and they dont even care.

 

[zaka]

sorry but I cannot figure out what is the surge or flutter Or maybe I can't hear it with my stock airbox. I've got only a woooosh then a ping and a little "tink" after lol...
My mods are: KN, ETS, Test pipe and Piasini Tune.
Before I've tried with blue spring + 2 shims, and It holds boost like the stock bpv
Then the red spring (0 shim). The "woooosh" is a little bit louder and at low rpm (about 2500rpm) at 6th, I couldn't hear the ping sound.... It's hold boost better but not enough at higher gear
Now I add 1 shim, and It hold better, but I'm afraid with the compressor surge that I couldn't hear
So I don't know if it's too stiff or not...

What does it mean if you've got only a "woosh" sound at lower rpm and higher gear? the spring is not enough stiff??
I'll try to make a video to show you. Unfortunatly, I still don't get a boost gauge to check it, but for me the red spring + 1shim is the better setup for my car...

Thanks for help

 

[Speed3Rookie]

The Forge is louder than the stock BPV.
I went from blue w/2 to yellow w/2 and it holds boost just fine. I think going with the softest spring and shim combo that holds boost is best for the turbo.

 

[zaka]

With KN,Test Pipe and ETS 3.25" I had the blue spring + 2 shims, and it holds boost really good. But now it's different because I've got a Piasini reflash, and the old setup on my Forge don't hold as much as it would!
I think with red spring + 1 shim, I've got a little flutter at low boost, but it means that it's the right setup?!

Here some videos:

2th to 3th gear:
http://www.youtube.com/watch?v=elmqdiR_JHc
6th gear:
http://www.youtube.com/watch?v=4Ga8tI_4vpE

What do you think?