Installed my forge bpv

What's the deal with all these springs and shims? I'm planning on getting the Forge BPV here shortly as well but it sounds confusing! Does it come with a little box of springs and other little goodies and the directions say: "Good luck!" ??

Its not confusing. The only confusion was some of the older orders were sent with the wrong spring set. The bpv comes in a box with 3 springs and 2 shims. The stiffer springs are meant for the higher boost levels.

Yellow = weakest spring (shouldnt use even if stock)
Blue = middle (what 90% use)
Red = stiff ( when your pushing 20 psi)

Shims = each shim makes the spring a little stronger.

Install takes like 5 min and I never got instructions so I dont know what they say.

Basically just test out blue spring, blue spring + 1 shim, blue spring +2 shim

See which one feels best for you.
 
I think some of you are confusing flutter with surge.

Flutter on a low/non boost situation is fine. The valve is basically trying to equalize pressure. This is not surge. When you let of the gas.

On a high boost, if you dont hear your forge ping off, its too tight= surging if you can hear it. The ping noise is the basic way u can tell if its recirculating properly.

If your using a yellow spring it is probably too light and will not hold boost pressure well and blow off(recirc/ping) very easily. Most use blue and a shim or 2 (even stock app)

Disregard the recommended spring (yellow i think) for boost pressure from forge website, that is not correct for our engines.
 
Im running completely stock besides the Cobb AccessPort. Im so totally sold on this product. I have never been so happy with something I have purchased for a car. It feels so much stronger when im running it through the gears. Instant boost into the next gear. As for a drop in power???? I havent felt any. If there is a drop in power.. the lack of lag when shifting gear to gear makes up for it alot. BUY ONE ASAP. You wont be disappointed.

Awesome!



So how often do you have to service this BPV or do you even have to?

Depends on where you live. If in extreme cold or extremely dusty conditions you might want to service the valve more frequently but if not I recommend giving it a once over once or twice a year.
 
I got my valve used and I have 2 shim / blue spring in it. I tried 1 blue alone and the far felt VERY sluggish. Overall it feels okay but everyone seems to notice such a night and day difference. Maybe mine is broken or something :(.
 
Check that the recirc tube is tight on the discharge port of the valve. You may have to ditch the factory tension clamp and use a worm-drive style, if that connection isn't sealing right the car will draw in un-metered air and you will run rich.
 
Check that the recirc tube is tight on the discharge port of the valve. You may have to ditch the factory tension clamp and use a worm-drive style, if that connection isn't sealing right the car will draw in un-metered air and you will run rich.

hmm ill try getting some tighter clamps.
 
i'm curious, did the tighter clamps resolve the issue?

bpv will be one of my first purchases after Christmas.(cabpatch)
 
Last edited:
if you have a forge on a stock speed 6 will you still hear the "ping" blow off?? i still have the stock airbox...
 
okay so i just want to get this straight. Will or can I ever get compressor surge with using the blue spring on a stock MS6? Compressor surge is the only thing that I'm worried about :( Because part of me wants to just play it safe and sacrifice some boost with the yellow just to make sure that I don't get any surge.
 
I had your same dilemma about 3 weeks ago. Just try the blue by itself.... Than try it plus 1 and then 2. See what feels best. I was completely stock beisdes the AP when I put mine on and I stuck with the blue plus 2. So just tinker around with it. It only takes a couple minutes to switch it out. Did you say play it safe and sacrifice boost????? Over the line!!!
 
Back