i've got this Forge DV, but am now reluctant to install it after reading all the bad reveiws on it, with the fluttering...

isn't this causing surging...?

 

many dv's (recirculating valves) flutter.. it's just how they are..

it's mainly when you're not going wot..

check this guy's site out.. he has an hks bov in recirculating mode that also has a flutter... but much worse than the forge actually..

btw, the dsm guys on some boards are making fun of this guy.. they just can't understand that this guy takes so much time and energy out for the bov! lol

http://www.collectracecars.com/evo/hks_ssqv.htm

 

I've got one, I'm having problems, not just the sound, but the jerking that comes with it. I could ignore the sound, no big deal. But I can't ignore the driveability issue. I've looked into a cure, and it seems asthough the only 100% cure is to go with something else. I've noticed though, that most of the jerking problems are hand in hand with a open element intake, such as the HKS suction kit, other similar designs.

 

I think you could solve the flutter problem with the next stiffer spring in the color range. Also, a lot of the "problems" have been attributed to mounting the BOV upside down...

 

O.K. guys

If you are having surgeing (not flutter but surge) you need to go to a softer spring and a maybee a couple of shims with the softer spring as there is a big difference between spring rates.

If you are having flutter and not surge try adding a shim or two with your existing spring.

Also, surge can be avoided by changeing your driving style a bit and rolling out of the throttle instead of jumping out of it. Obviously there are times you can't avoid jumping out of the gas, like when a soccer mom cuts you off in traffic, so you still need to tune the valve as best you can.

Please correct me if I'm wrong Tom!

For what it's worth, the forge valve is great unit at a great price. I have installed both vta and recirc valves on a couple of my customers cars and they seem very happy with the results. You will generally get quicker spool between shifts and quicker spool at part throttle.

I run the yellow spring in my recirc valve at stock boost with stock intake and it seems great to me.

 

Having to shim a valve that is supposed to be for our cars sounds like a tremendous PIA... I think I'll stay stock until someone actually does R&D for our car.

 

Hey all,

I have my Forge with the spring that came in it, stock airbox with K&N and it works great.

Holds boost well and virtually no flutter. Originally, I did have flutter with the Forge, but then I noticed that the vac line was kinked, so I cut it to fit better and the problem was just about eliminated.

To specify, my "flutter" was as follows: part throttle in 5th gear at ~3000 rpm as boost built, I would get a little stumble or something like the valve was going between open and closed. Now, it almost never does that, but if it does, it's much less pronounced than before.

I have the vac line pointing "up." I wonder if the other orientation or other open element intake are more likely to cause the problem.

Oh well, just wanted to point out that not all people are having bad problems.

Take care,

FB

 

True, but you have to adjust all bov's, the difference is that you have to use shims and springs with the forge. but it costs like $100 less than some of the others so....

 

Ok, so I have the forge DV with the blue spring currently in. I'm running stock boost but really don't like the noise it's making. I have a red spring, green, and yellow. In order to make the sound less of a skreetch- which spring should I load in there and how many shims?

I've read most of these threads but couldn't find a conclusive answer to which spring will cause the least amount of purging.

 

You can run it 'backwards'. I did this, and it stopped the squeaky noise. If you check on their website under other applications, it mentions that the valve can be oriented in either way.

 

I believe that the order from softer to firm is green, yellow, blue, and red. That's how it is for my forge 007 that is in my VW.

 

Expensive paperweight at least thats what mine was on my 1st Evo I had it on. I tried every shim and spring combo and backwards and forwards orientation but it would still have the surge problem. I sold it to another Evo owner who's car was stock and it worked great but once he changes a few things same thing no matter how he adjusted it still surged. The noise never bothered me but the surging was dangerouse especially around corners. With my new Evo it will stay stock.I have heard of others having no problems maybe there was a bad batch who knows. If you get one and experience the surging please be carefull.

 

hmmm so if I wanted the least amount of sound I'd choose the red spring?

 

Surging meaning???? Leaking boost?

 

Doen't really work that way. You want the spring that will hold the best without surging.