I installed my valve today. You'll have to pull the intake off to install it. Gave me an excuse to clean the MAF sensor.

I ended up using the stiffer spring. No compressor surge, so I think it's the right choice. The piston doesn't have that much area, so I was afraid it would leak with the soft spring.

The other thing is that it wasn't super smooth when I got it, so I decided to try pulling it apart to grease it. My motor oil made the rubber swell, and it would stick. Bad idea. White lithium grease would cook in the turbo, so that was out too. I even tried some leftover Redline transmission fluid, but it was still a little sticky. I ended up buying a tube of Mobil 1 synthetic grease, and a very very light coat on the piston, o-rings, and the inside of the valve did the trick.

I faced the valve opening downwards inside the turbo. That's the best direction, so make sure you do that. The other 2 directions will likely work, but it's not as efficient.

 

Nice picks!!!
It looks like the piston moves down as far as the position shown on the pic..backed and recessed in the chamber? So you never have an object moving on and off the surface of the opening. The edge is always engaged and sealed by the O ring.
Thanks for the info...still waiting for more feedback before I decide. I guess the only "fly in the ointment" is how will the O ring around the opening hold up?

"I was afraid it would leak with the soft spring" ...why? Under boost you have the full force of the boost in the vac line plus some spring against the piston, more than equaling the boost on the other side. Additional spring force will do nothing as far as keeping the piston sealed against the wall. All you're doing is adding more to the RELEASE threshold..not a good idea?


BTW..how was the condition of your Stocker? How many miles on it? If you're so inclined, picks of that would also be nice to see condition.

 

Warren! How's the car running with the Forge BPV???

 

No tears in my stock valve. Looks pretty good actually. I have just over 11k miles.





As for the spring, I think the yellow is ok. We have a lots of vacuum at idle and at throttle lift. I suspect there will be no problem cracking open this BPV. Also keep in mind that it's a metal to metal seating surface which prevents the boost from leaking through, so you need a good bit more than just equilibrium to hold it shut.

As long as you don't get flutter/surge, I don't expect a problem with the yellow spring. Gdubs, are you running a stock intake? If he's got an aftermarket intake, he would be able to hear the sounds more clearly. My stock one muffles this greatly. It's barely any louder than stock.

If I have time tomorrow morning, I may swap the spring and try the green, just as an experiment.

 

I like the idea of swapping the stocker out with a more durable piston version. Thanks guys, for testing this out for the community. Now I know what to buy if my stocker starts to fail me.

 

Thanks for the picks. Damn, these stockers (yours now and the other one posted here) are looking pretty good after 14k miles. Yours looks pristine as well as the other one..and you're pretty aggressive with the car. Looks like they could easily go 3-4 times that milage? My take is what the other guy just posted.... "Now I know what to buy if my stocker starts to fail me" . I just don't see *fixing this if it ain't broke*. There's no peformance gain to be had...reliability...perhaps. Don't forget, you still have the rubber 0 ring around the opening...that's the weakest link here now. I guess you and the other fella are gonna be our guinea pigs .
Thanks for all the great feedback..appreciate it

 

Yes I have the Hahn intake, and i think i hear flutter but its so faint and so few and far between i can't tell.

but the sounds out of this Forge is awesome. it amplifies everything, you can hear the turbo spool allllll the way down to nothing. Its kinda cool. I had someone say it sounds like a diesel winding all the way down.

I like it, And as far as the "dont fix it if it aint broke" i agree with you, if your not having problems with your BPV then dont swap it out. But i have stupid money so i figured i would be the 1st so that when people need a replacement they know exactly what the options are.

 

I think the slotted opening acts like a whistle. That's why you can hear it.

 

sub'd

any vids?

 

How can I get this disease?

 

Alright, if you hear a little flutter, I'll try the green spring then. Dammit. I knew I should have faced the clip in a more convenient direction...

 

Alright, I've swapped to the green spring after my morning walk with the dog.

 

Live with your parents, Get a job that pays $40,000 a year, and save for years.

Then you will get to a point where you just have gobs of money and have no idea what to do with it.

In April I almost bought a 700whp Supra for 35k, but i backed out of it.

why? id have no idea how to fix the damn thing or where to take it.

Thanks to Mike Nelson for letting me see that side of it BUDDDDDYY

 

Welp, I take it back. The green is the right choice for me. Boost appears to drop faster when I lift. I still hit my boost targets, so there's no point in going to the yellow for me. I run 22-23 psi.

 

there ya go!

 

i will get some videos tonight if i have the time. which i think i will

 

i wonder if my new engine is gonna have the metal BPV

 

Well, it's not actually a metal BPV. It's a metal BPV cap. You'll still have the same diaphragm in there, I assume.

 

I dont think your turbo is being replaced. When they say new engine, it usually means new block and internals. As far as I know, everything else gets reused. Ive seen two LNFs get new 'engines' here in Houston but its actually the block and internals that got replaced. Sensors, turbo and all that was reused. In fact, I dont even think the head was replaced. Whats porous and defective is the block and thats what they replace.

 

Motor rebuilds aren't *plug and play* jobs as you point out here. Having said that in some cases it's easier to go with long block and be done with it. However, turbo wouldn't be included as you point out. I would like to know what they finally do in this case. Just curious.

 

my stock bov surges like a ****... car is completely stock other than a revised AEM intake.

 

If one were to have a stock BPV that was stuck open, even a little bit - what would the symptoms be?

If so, would the ecu give a CEL? If so, what would that CEL be?

 

it'd probably sound like its spooling waaayyyyyy hard... you'd also hear it spin up and down freely at a much slower rate.

 

wow this thred is the ****!!!!. great info for us newbes to the turbo world thanks for the risks gdubs and wangspeed.you dudes be the man to ya guys

 

from what i have heard from others new engine is a complete setup... no dealership is going to do an engine rebuild or swap out of head and internals that's too much labour and leaves too much room for error and wastes money and time. i have also heard others say turbo was included... but i'll see when i get mine... the guy on the phone told me a completely new crate engine from GM... i'll keep yas posted..