[chiefsotos]

I just bought forge dv and i am ready to install them. I know most of you put the yellow springs in but i daily use my car with procede torque settings at 40% and max boost at 11psi. There are little moments that i user torque settings at 85% and max boost at 15psi.
I am thinking of put the green springs with two spacers inside? What do you think?
Is there any way to find out if the valves don't close quickly enough? (i have boost gauge and procede datalog)
If i use yellow springs is there a way to find out if the dv don't open quickly enough? (maybe some boost spikes in procede datalog)

[Jonny550]

Ive seen a couple threads talk about "how springs dont matter in DV" but i really didnt read the entire thing because it was like a 200 paragraph story but if you for it you should be able to find it and its a full write up on how different springs dont matter or something like that .

[luca335i]

I would say yellow without the spacer. That's what I run.

[cocoturkey]

what about procede with meth kit? what is the right spring for that setting?

[Ilma]

Doesn't it go something like this........

The stiffer the spring, the greater pressure differential required to crack the valve open.

Stock specs release boost at around 4 psi differential, so a stiffer spring would raise that to a higher psi.

My concern would be about that momentary buildup in backpressure . Would it work its way back towards the turbo.......could that lead to flutter and slowing down of the turbine blade?

Since it all happens in less than a second before pressure is released, does it really matter if the turbos are pushing into a 4 psi differential or an 8 psi differential? It's not sustained anyways.

I have used the yellow springs before and boost response was much crisper and more stable - especially while ramping up when the throttle blade is not fully open.

But I think I heard a little more of a strained sound in the induction noise. Anyone else experience this?

[335xiRT1]

i was debating betweeen green with spacers or the yellow, but it seems on this forum most are running yellow with no problems.
Ive been running the yellow w/o spacers, they work great. def a difference over the stocks. ive data logged it no boost spikes, just smoother boost at WOT.

[chiefsotos]

With green spring and two spacers, is there any way to find out if the valves don't close quickly enough? (i have boost gauge and procede datalog)

If i use yellow springs is there a way to find out if the dv don't open quickly enough? (maybe some boost spikes in procede datalog)

[enrita]

just put the yellow one on.

[dzenno]

Shiv runs green, I run green

[Sal G@Camber-Toe]

i was also wondering the same thing, since im getting ready to purchase these. Is an upgraded charge pipe recommended to go with these too?

[ianthegreat]

Originally Posted by enrita

just put the yellow one on.

+1

Just put the yellow one on. After time it will become even more flexible.

[ianthegreat]

Originally Posted by thesalg

i was also wondering the same thing, since im getting ready to purchase these. Is an upgraded charge pipe recommended to go with these too?

I actually would recommend a diff charge pipe. The forge DV's sit kind of lose in the factory charge pipe. I really doubt boost is leaking, but if you want peace of mind.

[Rockstarr]

Originally Posted by dzenno

Shiv runs green, I run green

Are you using any spacers?

[e.n335]

I use the green springs without spacers, speced up to 15psi. I'm interested in opening the DV's as early and fast as possible to avoid unnecessary turbo stress. However, I'd expect that they would hold constant 16psi ( @throttle body with an appropriate FMIC ) easily which I don't plan to exceed within next time.

BTW, I don't have a PROcede.

Cheers,
Eugen

[chiefsotos]

Guys today i installed them and i have a question
The back valve sit tight and only play right-left.
The front one, although it made the click sound, when put in the grey ring, it plays 1/2 centimeter up and down. Is that normal? Any way to test for leak?