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

[mk_slayr]

Just got my Forge BPV in the mail today, the unit looks great.

It was preloaded with a green spring, but I have yellow and blue springs. I've heard a lot of people with fairly stock boost use blue and it works. The blue spring I have is the thickest and strongest. I don't have a red spring/

Is the red spring something you request?

I don't want a red spring, but I'm worried that the color coding may have changed and the blue spring I have has the same spring value as the old red one...

Which makes me hesitant to use the blue spring because I want it to actuate under partial lift off not just wide open when I'm not at the track...

[Bravnik]

I would appreciate some clarity on this as well. My BPV has been mailed and I expect it any day. I had planned to go Blue with 2 shims....now I dunno if blue = red or what.

I'm so confused!!!

[oskinosmee]

I use the red with no shims

[mk_slayr]

To answer my own post, the blue seems like the original blue, it is pretty light. Pretty much anytime I'm in the boost and let off it pinks. Getting a bit of flutter in 5th and 6th in very low boost 1 to 3 psi or so but anything higher, and in any other gear it is fine.

Install was very easy except I'm a dumbass or incredibly strong and snapped off the bolt on the intercooler shroud, just spun right off, barely any force, I fished the shaft out by pressing my thumb on it and turning it. I don't know why it was so weak. One thing that bugs me that I will address tomorrow, is that the hookups for the vacuum and boost hoses are smaller than stock so the tubes fit fairly loosely even with the stock clamps. I'll go and pick up better clamps tomorrow.

As for the good stuff, the 1-2 shift is much easier for me now with the power being transitioned perfectly and the power building at the right time. It "feels" as though it spools a bit quicker in all gears as the power comes on a bit sooner and it feels like the car pulls a bit harder, I was getting up to 60 in 3rd without realizing it. Generally I can maintain a speed without getting into the boost by adding just a bit of gas, now this little bit of throttle was causing a bit more acceleration.

Between gears on power shifting it feels like the boost is building faster.

I hate giving impressions without having data to back it up. I will do some runs this weekend with the good ol' DH and see if I can't quantify what I feel. I might head out to the track sunday and put down some stock vs blue vs blue 2 shim logged passes...

The noise is very much pink, but there was a significant whoosh that I had not discerned from the posted videos, almost like the stock diverter but more so. I like the way it sounded when posted but like it more so now.


Again, back to the original topic, I think that the blue spring is still the blue spring, but I wouldn't mind some confirmation on that, also do we have to request a red spring?

-MK

[patty AT forge]

Same blue as before. We have a new team building our orders in the UK so they must be putting the wrong springs in the boxes. So green, yellow, blue instead of yellow, blue, red. I'll let them know.

[Bravnik]

OK thanks. If we don't get a Red can we request one?

[tru-boost]

keep the blue aybe even with some shims for stock boost.
i moved up to red and i add a shim at the dragstrip ! i also see 20+psi .

[WhItEtRaSh]

Same blue as before. We have a new team building our orders in the UK so they must be putting the wrong springs in the boxes. So green, yellow, blue instead of yellow, blue, red. I'll let them know.

I just received my Forge BPV and it doesn't have a red spring. The one pre loaded is like a light green/brass color. the other two springs are blue(turqiouse spelling?) and yellow. The blue one is thicker and stronger than the rest. Is this the right spring to use?

[tru-boost]

I just received my Forge BPV and it doesn't have a red spring. The one pre loaded is like a light green/brass color. the other two springs are blue(turqiouse spelling?) and yellow. The blue one is thicker and stronger than the rest. Is this the right spring to use?

they sent you the wrong spring set. the green is super weak. it is what they use for the MS protege which only runs like 6psi. use the blue for sure, maybe even a shim or 2 ! i would let forge know though and have them send you out a red spring. you dont need it now but you may later !

[WhItEtRaSh]

they sent you the wrong spring set. the green is super weak. it is what they use for the MS protege which only runs like 6psi. use the blue for sure, maybe even a shim or 2 ! i would let forge know though and have them send you out a red spring. you dont need it now but you may later !

Ok so I'm lost now. If they sent the wrong set or the one for the MSP, then this blue spring I have will be too strong for the MS3 (Stock Boost)...I don't have my boost gauge yet, so I just want to make sure.. I called Forge and well basically, they had no clue what the hell I was talking about...

[tru-boost]

all the forge springs are the same. you use a certain spring for a certain psi.
your blue spring is fine. the spring set for the MS3 should have had the red spring instead of the green thats all.

[WhItEtRaSh]

Just installed it with the blue a few minutes ago..I didn't get that "pink" people are talking about...Actually it was pretty much as quiet as stock...

[Bravnik]

Yah my concern is not having a Red Spring as I'm running 19PSI and a Map Clamp. I hope to get mine today and if so I will install the blue with 2 shims and see how she does.

[WhItEtRaSh]

I just want to know for absolute sure that the blue spring I received was the one I was supposed to get...I highly doubt it, but I'm going to wait until I get my boost gauge and install them both on...

I'm just worried that I didn't get any noise, whereas everyone else's car makes that pink noise...I'm not one for noises but hearing this one would be a good indicator that everything is right...

[patty AT forge]

Same blue as before. We have a new team building our orders in the UK so they must be putting the wrong springs in the boxes. So green, yellow, blue instead of yellow, blue, red. I'll let them know.


We only make 5 springs for our valves; black, green, yellow, blue, red. If its blue it is the same blue that everyone else has.

[WhItEtRaSh]

We only make 5 springs for our valves; black, green, yellow, blue, red. If its blue it is the same blue that everyone else has.

That's god to know...I installed the Blue Spring and the BPV but after letting off, or shifting while in boost, it didn't make a sound at all...Does it need to break in? The blue spring is very thick and I had to push it into the valve..I didn't just slide in easily

[shucky]

Patty, I was going to order the valve today. How can I ensure I get the yellow, blue, and red springs?

[astraelraen]

With my CX7 if I put the yellow spring in it will max out at ~11psi. I use the blue spring.

I would assume the MS3 needs the blue or maybe even the red if you upped the boost.

[mk_slayr]

That's god to know...I installed the Blue Spring and the BPV but after letting off, or shifting while in boost, it didn't make a sound at all...Does it need to break in? The blue spring is very think and I had to push it into the valve..I didn't just slide in easily

Mine was audible right off the bat. If I could hear/feel the boost when shifting it would pink very audibly. Even with the windows up every gear shift if I'm on it is audible.

Its a bit touchy with just the blue, I'm going to add in the shims tonight when I put on the t-clamps...

[WhItEtRaSh]

Mine was audible right off the bat. If I could hear/feel the boost when shifting it would pink very audibly. Even with the windows up every gear shift if I'm on it is audible.

Its a bit touchy with just the blue, I'm going to add in the shims tonight when I put on the t-clamps...

Was your blue spring the thickest and did you have to push the spring in, instead of just dropping it in? Mine, I had to push it into the base, it wouldn't just "fall" in like the others... I'm lost because you seem to have the same springs as me, but yours was audible, and mine, well I can't hear anything really...

[Bravnik]

Ok just put mine on and did a test run. My Pinged very loud to say the least. I upped the boost back and not only does it Ping now but the blowoff is loud as hell as well (lol I though I blew the hose off).

I'm currently running the blue spring with both shims in place. I might need to go to the Red Spring but not sure. Patty is there anyway to get a Red Spring sent to those that didn't get one? I got a Green, Yellow and Blue only.

So far I love it. Running 19PSI the Ping is loud as well as the air releaseing. Oh and my Blue Spring dropped in just like the rest. I didn't have to force it in or anything.

[WhItEtRaSh]

Ok just put mine on and did a test run. My Pinged very loud to say the least. I upped the boost back and not only does it Ping now but the blowoff is loud as hell as well (lol I though I blew the hose off).

I'm currently running the blue spring with both shims in place. I might need to go to the Red Spring but not sure. Patty is there anyway to get a Red Spring sent to those that didn't get one? I got a Green, Yellow and Blue only.

So far I love it. Running 19PSI the Ping is loud as well as the air releaseing. Oh and my Blue Spring dropped in just like the rest. I didn't have to force it in or anything.

Great, what did I get the one shitty blue spring?

[mk_slayr]

Great, what did I get the one shitty blue spring?

Mine just dropped in as well...

[WhItEtRaSh]

Mine just dropped in as well...

After messing around with it, I deffinately got a crap blue spring...the other two springs just drop right in. The Blue, I have to jam the hell out of it to get it to fit...

[Bravnik]

After messing around with it, I deffinately got a crap blue spring...the other two springs just drop right in. The Blue, I have to jam the hell out of it to get it to fit...

If you are running factory boost you should be fine. Just put in the yellow spring with both Shims. They should send replacements for your blue and our missing red springs.

If you're running boost, then turn it down to factry and run the yellow one with shims.

[WhItEtRaSh]

If you are running factory boost you should be fine. Just put in the yellow spring with both Shims. They should send replacements for your blue and our missing red springs.

If you're running boost, then turn it down to factry and run the yellow one with shims.

I'm going to toss the yellow one in tomorrow morning, and hopefully it works...But I would still like a receive a blue spring that fits, and a red one...

[Ghetto Mods]

O.K. so what's the verdict on a mostly stock speed 3? I'm adding TBE and FMIC. Do I go w/blue or blue w/shims or what??

Thanks!

[Bravnik]

I would go straight up Blue on Stock or Yellow with 2 shims. Its your call. I think I might be getting surge with mine at Blue with 2 Shims, but I'm boosting 19PSI.

[Bravnik]

Oh just another question. How tight did you tighten the top of your BPV and did you use a wrench to tighten it or just your hands?

[WhItEtRaSh]

I used my hands to tighten...I dropped in the yellow one today...I'm getting some sound but it is really faint...Not as loud as everybody elses...

[stefano18]

Hey WhItEtRaSh, do you have a intake? or stock box?

[WhItEtRaSh]

Hey WhItEtRaSh, do you have a intake? or stock box?

The car is bone stock, well other than the bpv...Intake is coming in the mail...

[stefano18]

your bpv will be way louder with intake. I just installed my intake the other day and it's way louder. It's very quiet with stock box..

[Bravnik]

Mine holds boost so well now. When I'm doing 80MPH I'm running dead 0 boost. I just tap the gas in 6th and I'm at 10PSI.

I might go down a shim or both even though I'm running 19PSI. I'm not sure if I'm getting low boost flutter from the valve or surge.

[mk_slayr]

Mine holds boost so well now. When I'm doing 80MPH I'm running dead 0 boost. I just tap the gas in 6th and I'm at 10PSI.

I might go down a shim or both even though I'm running 19PSI. I'm not sure if I'm getting low boost flutter from the valve or surge.

The only time I get any flutter is if I'm in 5th or 6th gear at less than 50 with low boost.

It feels a lot better now though, and it slams in 6th :)

[Speedy3]

Ok, so check my signature for my current and coming mods. What spring do I use? no MBC or MAP Clamp.

[patty AT forge]

That's god to know...I installed the Blue Spring and the BPV but after letting off, or shifting while in boost, it didn't make a sound at all...Does it need to break in? The blue spring is very thick and I had to push it into the valve..I didn't just slide in easily


Hmm. Can you send me pictures? pat@forgemotorsport.com

[patty AT forge]

Patty, I was going to order the valve today. How can I ensure I get the yellow, blue, and red springs?


I'll let the guys here know to make sure that all the valves leaving Forge US have the right springs from now on.

[patty AT forge]

Anyone needing a red spring email me or PM me.

[nypest]

Im running stock boost. I started with the yellow realized it was to weak went to the blue liked it much better. Then went to red LOVED it but got some surge. Final set up for me is blue+1 shim. :)

[dparm1984]

If we order one today, we should be running a blue spring on a stock motor? There's some confusion here about which springs are which, and what the differences are.

I have a stock motor (except for MS CAI).

[killerMS3]

i am running at 17PSI, and i am surging into 19-20.5 with blue spring and 2 shims. there is also some flutter when letting off the gas slowly after hard acceleration. does this mean i should back off to blue+1 shim? this is confusing lol... or maybe i'm just an idiot...

[Bravnik]

If we order one today, we should be running a blue spring on a stock motor? There's some confusion here about which springs are which, and what the differences are.

I have a stock motor (except for MS CAI).

Yes I would recommend the blue spring for a stock MS3. I'm running blue+2shims myself but only because I didn't get a red spring yet. When I do I will try it to see how it does.

[fasteract]

Reason Forge has diameter of hose fittings a bit too small for the MS3 "dedicated" BPV...need new worm clamps to make them tight ? Just curious.

[tru-boost]

i am running at 17PSI, and i am surging into 19-20.5 with blue spring and 2 shims. there is also some flutter when letting off the gas slowly after hard acceleration. does this mean i should back off to blue+1 shim? this is confusing lol... or maybe i'm just an idiot...

valve flutter is not surge. if you hear vlave flutter at low boost venting that means you have a good set up going.

[nypest]

i am running at 17PSI, and i am surging into 19-20.5 with blue spring and 2 shims. there is also some flutter when letting off the gas slowly after hard acceleration. does this mean i should back off to blue+1 shim? this is confusing lol... or maybe i'm just an idiot...

That is what is supposed to happen !

[killerMS3]

ok ok, my bad... i had the just the blue spring in there, and then i added 2 shims, and did not notice any difference...

[nypest]

ok ok, my bad... i had the just the blue spring in there, and then i added 2 shims, and did not notice any difference...

The shims are for tweaking and tuning it to how you want to run.

[killerMS3]

i realize that is what the shims are for, but i did not notice any difference between 0 shims and 2 shims. nor did my logs reflect any change...

[nypest]

i realize that is what the shims are for, but i did not notice any difference between 0 shims and 2 shims. nor did my logs reflect any change...

I noticed a slight difference from 0 shims to 1

[WhItEtRaSh]

Got my BPV back today from Forge. Works great...

Thanks to Pat @ Forge for all your Help(2thumbs) Awesome customer Service!!!

[hectik1]

Just got mine in with the blue spring (no shims) and WOW! The boost response is night and day. Feels like there is no lag. I'm glad I got this!

[Jesse MS3GT]

I ordered black, gota polished in the mail. Oh well LOL. I guess I need some "bling" under the hood. No need for me to install it yet, ms3 is asleep :D

[fasteract]

Jesse..just out of curiousity, who did you order that BPV from ?

[dkswim]

subscribed

[hectik1]

Jesse..just out of curiousity, who did you order that BPV from ?I ordered mine from Protegegarage.com. When I ordered one for the CX7 I ordered from Forge itself.

[Jesse MS3GT]

Jesse..just out of curiousity, who did you order that BPV from ?

ken from protegegarage.com

[Speedy3]

The Forge BPV really does help boost come on quicker and stay on between shifts. It won't show gained peak HP, but if you look at the area under the power curve, there is more total power. I bet just adding the BPV will decrease 1/4 mile times by a couple of tenths or so.

[GhostMercury]

I have a pretty good understanding of turbos and such but does someone want to clarify for me what adding the shims are for, and how the springs make a difference.

[dkswim]

http://www.forgemotorsport.com/content.asp?inc=product&cat=0007&product=FMDVTUN
from the manufacture.

[jaydubz]

Anyone have a link to the BPV that is supposed to be used on a stock ms3?

[palerider]

Allright all you forge bpv experts. Im getting what i thought was surge(maybe now its flutter?) on my new turbo running 18psi. I had my old setup with blue spring and one shim in place.

I was utterly confused how a gt3071 would get flutter/surge at 18psi but the stock turbo would get the ping...

anyway.. i pulled out the shim.

Now i get flutter/surge on partial boost and when i go wot and release all at once. no ping whatsoever, or if it is i cant hear it with the flutter being so loud.

thoughts?

Can you mimic compressor surge with a spring that isnt stiff enough? Also... whats up with the forge guidelines for spring stiffness and psi? they claim that the red is for 30+ psi....wth?

[Jesse MS3GT]

Come on patty, where you at?!

[fasteract]

Patty has gone to England to work the assembly line so her Distributors here in the States will actually have a Forge part to sell !! (-:

[Hot Shot]

Just got mine in with the blue spring (no shims) and WOW! The boost response is night and day. Feels like there is no lag. I'm glad I got this!

Ditto. I installed mine last night and took her out. 1-2 gear are much better. I was not expecting the ping sound it lets out when shifting fast under boost. Sounds great though. I need to go out and log my boost levels to see what I'm at now....

[jam_asian85]

Patty has gone to England to work the assembly line so her Distributors here in the States will actually have a Forge part to sell !! (-:

I think "Patty" is a guy ... Patty = Patrick

[controlo]

anyone know who has a black bpv in stock? :(

[GhostMercury]

prolly ken

[controlo]

prolly ken

ken only has polished. :(

i want a black one.

once you go black, you never go back. haha.

[wisniaPl]

check street unit

[GhostMercury]

i hope ken has black ones when i order the MS CAI when it comes out

[controlo]

yeah, i just want black because my injen CAI is black.

[gr3y]

Noob question.. What do the shims do?

[Sierra117]

Quick question to the Forge gurus:

Running blue spring with two shims, still falling off boost up top (Spiking 16 pounds, holding 14 for the most part, falling off around 5000 down to 12 pounds.)

Should I toss in the third shim, or does my problem lay elsewhere?

[wisniaPl]

Quick question to the Forge gurus:

Running blue spring with two shims, still falling off boost up top (Spiking 16 pounds, holding 14 for the most part, falling off around 5000 down to 12 pounds.)

Should I toss in the third shim, or does my problem lay elsewhere?

shift st 5k

[Sierra117]

shift st 5k

Why would I want to do that? I have the CDFP, I'm gonna make full use of that extra 1000+ rpm!

[wisniaPl]

Why would I want to do that? I have the CDFP, I'm gonna make full use of that extra 1000+ rpm!
jk I have no idea why...ordered mine bpv yesterday:D

[mckraut]

http://www.forgemotorsport.com/content.asp?inc=product&cat=0007&product=FMDVTUN
from the manufacture.

According to this, shouldn't a stock or close-to stock MS3 be running a yellow spring?

[tru-boost]

(deadhorse
c'mon guys......SEARCH
stock up to about 19psi = blue spring
over19psi = red
yellow = you are a wuss !

[wisniaPl]

so instaled my forge today and im surging with blue spring
im surging on 3rd when im under 3500 rpms
4th 5th and 6th gear when im under 4000rpms and during hard acceleration even when im on like 5k on those gear 456
should i change my spring to yellow with 2 shims or wait couple days for sping to break in???????

[tru-boost]

you are surging or you have valve flutter .....??? those are 2 totally different things. if it just sounds like the valve quickly open/closing you are fine leave it be. if it sounds like this..............
http://s11.photobucket.com/albums/a194/craighjr/?action=view&current=MVI_2891.flv
that is surge and you have a problem. i have never, or even heard of someone getting compressor surge with the blue spring, even with shims.

[Jesse MS3GT]

When I have two shims in I get a very small amount of flutter when letting off the throttle completely @ full Boost 5k+ RPM. No shims no flutter. Im thinking of going with one shim just because flutter PING! sounds kind of annoying.

[wisniaPl]

its when im cruising around in like 4th gear doing 45mph and when having 3k rpms floor it and let of around 3,5k rpm or 4 and is like surge but it soundslike half of air is coming out of bov and you can hear small surge i have idea when cruising i wont floor it will go gentle an you can hear air coming out of bov very nicely
I have pingsound is liek wssshhh ping is it bad?

[wisniaPl]

made video firs one is with no shims i think 3rd and 4th gear
http://i163.photobucket.com/albums/t282/wisnia628/th_noshims.jpg (http://s163.photobucket.com/albums/t282/wisnia628/?action=view&current=noshims.flv)


second one is with 2 shims same gear i gues because fisst and second dont have this sound
http://i163.photobucket.com/albums/t282/wisnia628/th_2shims.jpg (http://s163.photobucket.com/albums/t282/wisnia628/?action=view&current=2shims.flv)


Is it surge or valve flutter??

[tru-boost]

that is flutter...hands down. you are not surging at all. the truth is, you want to hear flutter from the valve. if your spring is too loose and the valve makes a very clean sound that means you are venting your boost too fast. that is the safest thing for the turbo, but the worst way to set it for performance. if the spring is too stiff the valve wont vent at all, or very little. that is what causes compressor surge. the idea is to be set as stiff as possible without surge. the "flutter" is a good indication that you are right in the middle of too tigh and too loose......perfect !

[mckraut]

(deadhorse
c'mon guys......SEARCH
stock up to about 19psi = blue spring
over19psi = red
yellow = you are a wuss !

Excuse me for pointing out what the manufacturer's website says. I know what the damn forums say, I'm just curious why the company website contradicts what we already know.

[wisniaPl]

so i can run with 2 shims??

[shadrag]

Excuse me for pointing out what the manufacturer's website says. I know what the damn forums say, I'm just curious why the company website contradicts what we already know.

Company website = old
Person from company posting on forum = newer

[mckraut]

Company website = old
Person from company posting on forum = newer

Ahh, well shame on Cobb. Update your site guys! :-)

Thanks for clearing that up.

[SharkDiver]

I ordered the forge BPV and will try the blue spring with no shims..wish me luck..

[wisniaPl]

so i can run with 2 shims??

????

[SharkDiver]

Im guessing if you have to use 2 shims you just need to go up 1 spring and use no shims.

[wisniaPl]

Im guessing if you have to use 2 shims you just need to go up 1 spring and use no shims.

so I should try red spring??

[SharkDiver]

From reading what tru boost says,You should be ok where you are at with the blue spring and no shim..i guess you could try putting 1 shim in and see what happens.Im just going by what I been reading because I dont have the bpv yet so Im just guessing.

[wisniaPl]

I put 2 shims and its the same I showed on video one is with no shims second one with 2 shims

[SharkDiver]

I got mine today and it came with the yellow spring installed.I put the blue spring in with no shims and it seems to be perfect..Also right now my car is all stock besides the cai because I have to take my car to the dealer for service again.I may try the yellow spring just to see what happens in the next few days.On a side note when I push in on the valve on the stock bpv it is much harder then pushing in on the forge valve with the blue spring.I dont know if that matters.I havent got to do to much testing with it but it does seem to hold boost a little better and longer.I dont know if my stocker was leaking but Im just making my car more ready for the AP when it gets here since the boost will be a bit higher then.

[SharkDiver]

Wisnia..After listening to your videos again I dont seem to hear that ping sound that the forge makes..It does it with mine.I dont know if that means anything or not.Maybe mine is set wrong but it makes the ping sound and the whoosh sound.

[wisniaPl]

Wisnia..After listening to your videos again I dont seem to hear that ping sound that the forge makes..It does it with mine.I dont know if that means anything or not.Maybe mine is set wrong but it makes the ping sound and the whoosh sound.

I have ping sound but not as loud as without shims my gf say it like in blacksmith shop i think you should go with 2 sims I might try red spring to eliminate valve flutter
I was driving very easy to show strange noise that i though it was surge

[fructus]

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.

[SharkDiver]

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

[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?

[specvspeedfreak]

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?

how is the pasini flash and where did you get it from.. can you give me a number or link? thanks

[zaka]

how is the pasini flash and where did you get it from.. can you give me a number or link? thanks

This reflash is awesome!! I gained 40hp and 60lb/ft with only this reflash!! I dynoed my car after the reflash and with my all mods I gained 55hp and 75lb/ft (280hp on the wheels). The car is totally different now!!

But I couldn't give you the number or link in US because I live in Switzerland!

Here a link who someone did the reflash:
http://www.mazdas247.com/forum/showthread.php?t=123720398

[DaleNixon]

Subbin' because I think the Forge BPV will be my next mod. Is this mod actually SAFER for the turbo than the stock BPV? Or is it more of a performance from holding boost longer gain?

[CWPspeed3]

Subbin' because I think the Forge BPV will be my next mod. Is this mod actually SAFER for the turbo than the stock BPV? Or is it more of a performance from holding boost longer gain?

I think the stock valve was being "safer" bleeding off boost that would probably be easier on the turbo than holding higher boost longer. So I guess its performance because you hold boost longer, went from peak 18 to now 20 and hitting 15 and bleeding off to 11psi to holding between 14-15psi. Thats blue with 2 shims on mine.

[Renzokuken]

FOrge BPV= The shit.

[Speed3Rookie]

FOrge BPV= The shit.
Yepper..... :D

[flyrevs]

Oh just another question. How tight did you tighten the top of your BPV and did you use a wrench to tighten it or just your hands?
just hands - wrench will marr it all up

[Sinoito]

Has anyone had any problems with CELs after installing the Forge BPV? I just installed mine today and I drove around for awhile without the Check Engine Light coming up, but after I got gas the light came up.

[Speed3Rookie]

Has anyone had any problems with CELs after installing the Forge BPV? I just installed mine today and I drove around for awhile without the Check Engine Light coming up, but after I got gas the light came up.

Nope...check to make sure your gas cap is on properly.

[Sinoito]

Yea that's what I first thought it was, but I ensured that it was on right and it is. I just noticed that when I turn off the engine, I can hear a noise coming from somewhere under the intercooler. It sounds almost like a computer's processor when it's working to hard, then a couple of clicks, and then it cuts off. Forget to mention the only other mod I have is the CP-E Nano. I might just have to put all the stock stuff back on and take it to the dealer.

Update: I think I found the problem. The gas cap won't come off.

[Speed3Rookie]

Yea that's what I first thought it was, but I ensured that it was on right and it is. I just noticed that when I turn off the engine, I can hear a noise coming from somewhere under the intercooler. It sounds almost like a computer's processor when it's working to hard, then a couple of clicks, and then it cuts off. Forget to mention the only other mod I have is the CP-E Nano. I might just have to put all the stock stuff back on and take it to the dealer.

Update: I think I found the problem. The gas cap won't come off.

Uhoh....there is a l o n g thread about this on one of these sites.
Good luck!

[Sinoito]

I finally got it off after reading a post over in the Mazda 5 section, but the check engine light is still on. Could it just be the ECU?

[MicaSp33d]

take out the neg terminal on your battery for a few minutes and put it back in. That should reset the CEL unless theres still a problem. Or you can use a dashhawk to read and clear.

[Sinoito]

So I just came back from Advance Auto to read the CEL. It came back "P2187 System too lean at idle speeds." Could it be that a hose came loose when I installed the BPV?

[PCspeed3]

i dont mean to thread jack or anything, but is there anyway a stiffer spring could be put in the the stock bpv to eliminate the boost leak?

[DaleNixon]

I've just received my Forge BPV in the mail. I just put the blue spring (no shims) in and I am ready to install it! It didn't come with instructions... does anyone have a link to some install instructions? Thanks!

[freeflyfreak]

I've just received my Forge BPV in the mail. I just put the blue spring (no shims) in and I am ready to install it! It didn't come with instructions... does anyone have a link to some install instructions? Thanks!

You dont need instructions, its easy.

Remove intercooler cover.
Remove Stock BPV: 2x10mm bolts 2xhose clamps
Install Forge, reverse of above.
I recommend new screw type clamps for hoses as stock dont clamp well on forge.
Reinstall intercooler cover.

Done! Drink Beer.

[DaleNixon]

Yea it was really easy! The clamps are loose but the hoses held tight. I think I'm gonna buy some screw types from Autozone tomorrow.

[08_MS3_GT]

installed mine today, completed the swap in less than 15 min.

results are pretty solid. seems to build/hold power more effectively.

only 'relevant' comment i would make is that the valve releases pressure so quickly/efficiently compared to the stocker that i experience more engine/drivetrain movement because of the more sudden pressure change. an upgraded motor mount is looking like a must at this point.

[DaleNixon]

I didn't notice additional engine movement but I have the Corksport rear MM inserts. What spring did you use, and did you use any shims?

[08_MS3_GT]

I didn't notice additional engine movement but I have the Corksport rear MM inserts. What spring did you use, and did you use any shims?

the inserts are probably the difference. i suppose it's not necessarily engine movement so much as "whole car" movement. with the more responsive DV, my car really shifts its weight when i go from full spool to no throttle. it can make the next shift more difficult.

i am using the blue spring with two shims, as it seems to be the most common configuration i've heard of people using.

[SubieKiller3]

anybody got pics of their bpv installed?

[08_MS3_GT]

anybody got pics of their bpv installed?

it looks like the stock BPV, only either shiny (black) or silver.

[jezterr]

sorry, skimmed through the thread but didn't find a direct answer... would it be safer to go with a too stiff spring than a too soft spring?

i don't have a boost gauge of any kind right now, so i can't measure it in anyway. i just want to make sure i'm not damaging anything with having this bpv in.

[fastdreams]

sorry, skimmed through the thread but didn't find a direct answer... would it be safer to go with a too stiff spring than a too soft spring?

i don't have a boost gauge of any kind right now, so i can't measure it in anyway. i just want to make sure i'm not damaging anything with having this bpv in.

Softer is safer. Too stiff then the excess pressure can't vent and spins the turbo faster than it should, potentially damaging it.

Worse case with softer is that you release boost sooner than necessary, make less peak boost, and make a little less power.

[dkswim]

Softer is safer. Too stiff then the excess pressure can't vent and spins the turbo faster than it should, potentially damaging it.

while true softer is safer.
to stiff BOV/BPV will not vent when you let off all the presurized air will flow backward and out the turbo the wrong way. either causing sudden stoppage or spinning in the wrong direction and that what will cause the dammage

[Speedfreak1120]

to stiff BOV/BPV will not vent when you let off all the presurized air will flow backward and out the turbo the wrong way. either causing sudden stoppage or spinning in the wrong direction and that what will cause the dammage

aka compressor surge, search is your friend.