Just installed my forge bpv took it for a couple pulls, 2nd gear holds 18-19 psi, all the others about 19-20.. just thought that was odd cause usually holds 20-21 throughout the gears.. any thoughts? And with normal driving when I let off the gas therres an ongoing psshhhh noise quiet but lasts about 3-4sec and I know it didn't do that before.. is that cause of the forge? Also green spring is in the forge.

 

yea the lengthened psshhhhh is normal, lol.

as for the boost thing, im not sure.
I know you should match your spring based on the amount of vacuum you pull and not the psi your pushing. have you tried the yellow spring? see if you get turbo flutter. If so switch back.

I think the extended Psssshhhh is kinda cool.
You drive by someone and make a quick psh. They look but are unsure what they might have heard.... but when you go PssssSSSSsshhhhhhhhhhh, thats like a "Yup you heard it and are still hearing it, turbo. lol."

 

with the k&n...the damn psssshhh is like a hour long for 1 quick gas pedal push

 

what spring do you use for stock psi? about to install my k&n and bpv thursday

 

Haha okay, glad that's normal. And I was thinking maybe a boost leaked but everythongs on tight.. and I asked what spring I should use with my mods and I was told green lol.

 

green spring

I use it too.

 

Greean one. Comes in the forge in from modern.

 

I'm on green as well. I was thinking of trying yellow just to see, or adding a shim or 2 to the green to see the affects.

 

Cudajoe beat me too it. But yeah I was told use green, but when I got the forge there was a sticker on the yellow one and said use if ecu is remapped... lol uhhh..

 

i am looking into getting one of these but i have a question would it be okay to get it after i get tuned or do i have to tune again after i put it on? thanks

sorry for the thread jack

 

Np, and no dont need a tune dude!

 

From what i gather is the green spring is made for stock boost cars. If you have any kind of tune or upped the boost any then the yellow would be a good idea. Plus it says that on the little bag that the yellow spring is in. lol

 

This is not correct. Even with a tune, I would say 99% of people on here are using the green spring (and I use the 1% just to cover my ass for the 1 person that may be using yellow)

 

Yeah thata what im saying everyone says use green but the yellow is meant for more boost?

 

What vaccuum are you guys getting after warm up at idle? Should be around 20" HG.
Same with lifting off boost.

 

I think the sound comes from release of air through the open slot in the piston chamber, which always remains butted up against the open port in the turbo. Stock simply pulls the whole valve off the open port in the turbo.




Stock:

 

I dont know what my vacuum is I have a rpd lol

 

Sweet! And modern performance is the only ones that have them right?

 

Other than.forge, modern is the only site I know lol.

 

What is forges url?

 

get it from modern performance, its cheaper.

 

Okay! Thanks

 

so i officially have more flutter noise or surge with the forge...

 

maybe you put it in upside down or something haha

 

I hope not! That would mean it's not releasing enough boost on time.