I was wondering if anyone has run into this. So I finally got a manual boost adjuster. I got around to putting it in mon afternoon, hookd it up and took it for a test drive. 10lbs ran like a raped date, bad ***! pulled hard through all the gears, awesome, I got back to the house parked and she would barley idle. WTF, I'm thinkin I blew a head gasket or something crazy. Popped the hood and I'm hearing a vacume leak, I figure out its my BOV. stuck my hand over it (vented to atmosphere right now) and she idles up.
I pulled it off last night and took a good look at it, the diaphram had bunched up and has a little tear in it where it folds over between the valve and cap. I have a new diaphram and std sprind ordered, and the boost is back to stock for now. It was a ebay BOV but I have been running it for almost a year with NO problems. I'm going to chalk it up to age, I figured the higher boost pushed it over the edge. Any thoughts?

 

ebay Greddy BOV = knock off. Hopefully you didn't spend more than $30 for it.

 

Naw, its a genuine greddy R, the $270 one, I got it for $70 with shipping. It was a score, works great they have/had a great product. Until this happened. I was pokeing around last night and found somebody on a 240sx board that had the same problem with the diaphram bunching up(didnt say what the resolution to the problew was). I was thinking mabe the spring was getting weak and it hung open and the diaphram jammed up. Thats the only conclussion I can come to. My buddy was running the same one on his but swithed to the greddy S because he has 2" IC pipeing and couldnt recirculate it due to the massive size of the R. What are you running for a BOV Nismo? Anybody else? If this new diaphram jams I'm going to ditch the greddy R and try something else.

 

I used to run a DSM bov, then tried an aftermarket WRX one. Right now I'm using a Turbo XS RFL one:



I think I paid $35 on ebay... works good. If it fails... I'll buy some other kind.

 

A new diaphragm and you'll be fine. The diaphragm is the difference between name BOV/recirc valves and the knockoffs.

 

You should look into Forge bov's. I am using one on my car and it works great. I've heard decent things about the greddy r but many mixed reviews on the rs. So instead of paying 180 bucks for an rs, i paid 130 for a forge twin piston and it works great. they are used on audi's and saab's primarily, but a bov is a bov. they all have the same function...some just suck compared to others lol

 

Thanks for the feedback guys, parts should be in this week. I'll get it swaped out and try it again. I'll let you guys know how it pans out.