Which spring to use? Forge 007 DV

[vavJETTAw36]

I was sold a new set of 007 DVs and there is no information in the box about it. Seller didn't know anything about the springs/shim.

From all the searching I've done, I can only find info on the springs with different colors. Can anyone help me figure out which spring setup to use with 32psi?

Thanks,
Shawn


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[johnnybravo!]

i googled and found this..power of cut n paste!
off of forge's website
Valve Spring color coding
Green - 5-15 PSI
Yellow - 15-23 PSI
Blue - 23-30 PSI
Red - 30 + PSI

[vavJETTAw36]

i googled and found this..power of cut n paste!
off of forge's website
Valve Spring color coding
Green - 5-15 PSI
Yellow - 15-23 PSI
Blue - 23-30 PSI
Red - 30 + PSI

I appreciate the help, but check above. I don't have colored springs and I only have 2 and a shim ( i think it's a shim)


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[tate182]

i googled and found this..power of cut n paste!
off of forge's website
Valve Spring color coding
Green - 5-15 PSI
Yellow - 15-23 PSI
Blue - 23-30 PSI
Red - 30 + PSI

Lol flaming before you even read the whole post?

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[vavJETTAw36]

Lol flaming before you even read the whole post?

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He completely Hellen Keller'd and skipped over the photo. 🤦*♂️


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[Ephry73]

Forge will sell the spring kit separately. I think ecs does as well.


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[ReggieNoble]

From what I could find is, some kits only had the Blue and yellow spring. It looks like someone may have cleaned the paint off with cleaner or something. Hard to tell from pic. But it appears in your pic the Blue is on the right and the yellow is on the left

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[CJ_]

He completely Hellen Keller'd and skipped over the photo. 🤦*♂️


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I'd use the silver one 😂

Although Johnnybravos got a point, red is the stiffest spring and rated at 30+ psi. If you're running 32, you should be running the stiffer of the two, and if you really want the assurance, buy the spring kit and run the red one.

[vavJETTAw36]

Hmmm so the answer is to get the spring kit? Sounds good. I sent off a message to forge just to make sure


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[johnnybravo!]

Lol flaming before you even read the whole post?

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relax..wasn't my intent to flame as i was just cutting n pasting a response from a old post related to this.. i'm too lazy to re-write it all out.
although springs lose a lot or most of their paint over time there is usually trace amounts once can distinguish one from the other..but ya paint on these look pretty worn off..

[vavJETTAw36]

relax..wasn't my intent to flame as i was just cutting n pasting a response from a old post related to this.. i'm too lazy to re-write it all out.
although shims lose a lot or most of their paint there is usually trace amounts once can distinguish one from the other..but ya paint on these 2 shims look pretty worn off..

No clue what you are talking about. These are brand new and there's one shim


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[chris86vw]

Guess whats keeping the DV closed??? its not a spring

Boost pressure is keeping the DV closed, but its also pushing it open so you need the spring to just keep it seated.

You want the SOFTEST spring you can get away with which is usually only a couple pounds. Stiffer springs don't hold boost more all they do is delay when the valve can actually open and do its job.

[christianb5s4]

What Chris said, I had a Forge BPV in my Saab back in the day and played around with the spring kit they sell. The green spring was more than enough, anything past that caused flutter and surging and never had a problem holding 25psi of boost.

I'm guessing the green spring will work just as well on our cars.

[Seerlah]

No clue what you are talking about. These are brand new and there's one shim


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He is telling you the truth. The spring kit has paint on the springs to let you know which ones to use. My response would have been similar, but research would have yielded the same thing. The US distribution center is in Florida and any authorised distributor can have them drop shipped from there.

Or...squeeze the springs and see which one has the higher tension. Use that one. If surging developes while in boost, add the shim. If it doesn't stop, order the kit. I personally ran a 007, 004, and now run a 001 (no maf on a 1.8t bigger turbo). My springs have colors on them painted. Kit should have 3 painted springs (green, blue, and red) and two shims iirc. You seem to have been shipped a spring kit that fell off the assembly line.

[MacDaddy]

If you go to the forge website look up the spring kit and it tells you what to do (it also recommends calling them to make sure your doing the right thing) im not sure if the stock DV lines pressurize under boost but forge also sells a kit so that it can pressurize the DV and keep it closed if need be. I think a 30lb spring would cause a lot of problems

[Seerlah]

The top nipple pushes down with manifold pressure, while the underside of the dv has opposing force with charge pipe pressure. You will always have a pressure difference due to pressure loss along with the motor basically acting like a big vacuum pump (we just happen to try and overstuff). You need a pressure difference to keep the dv closed, but you can always get surging while in boost (not to be confused with compressor surge from blow back when the throttle body flapper closes). This is why people suggested just to play with the springs till there is no surge and the dv holds boost.

And now that I think about it...my kit had 4 springs. Forgot to count the yellow one. I personally just run the recommended with the blue spring at 25psi. Used to run the green spring with two shims on the stock turbo at 21psi with the 007. Now blue spring with no shims on a 5152 with the 001. Forge makes a decent product. No plans to switch to tial or another brand dump valve.

[chris86vw]

The top nipple pushes down with manifold pressure, while the underside of the dv has opposing force with charge pipe pressure. You will always have a pressure difference due to pressure loss along with the motor basically acting like a big vacuum pump (we just happen to try and overstuff).

That pressure difference is minimal and doesn't change with changes in boost or the turbo you are using.

You need a pressure difference to keep the dv closed, but you can always get surging while in boost (not to be confused with compressor surge from blow back when the throttle body flapper closes). This is why people suggested just to play with the springs till there is no surge and the dv holds boost.

And yet a functioning stock DV will hold double stock boost on just a couple psi spring... you don't need to jam in heavier springs to compensate for a pressure drop that didn't change.


Feel the spring on a 2.0t, hint you can squeeze it between your front teeth.. it holds well over 20psi just fine.

If surging is a problem less shitty/leaky valves not stiffer springs that defeat the purpose of even having a DV.

[S4James]

been running the same damn VF diverters for ten years from 20-30psi... ive messed with things... always just go back to proper orientation, no shims.

As I recall, forge started offering all these shims and other nonsense because of demand from the forum kids that convinced themselves that jamming a bunch of washers into their valves made them work better. Chris, you remember those days. Lots of bullshit mods in the 1.8t forums like "grounding kits" and other junk.


Good times.

[Seerlah]

That pressure difference is minimal and doesn't change with changes in boost or the turbo you are using.






And yet a functioning stock DV will hold double stock boost on just a couple psi spring... you don't need to jam in heavier springs to compensate for a pressure drop that didn't change.


Feel the spring on a 2.0t, hint you can squeeze it between your front teeth.. it holds well over 20psi just fine.

If surging is a problem less shitty/leaky valves not stiffer springs that defeat the purpose of even having a DV.

Not debating with you, just trying to validate things. Not quite sure of the forge design, but I experienced surge before with just the green spring before adding two shims. This was off personal experience. Now, I just follow the directions from the manufacturer. Makes it more simple.

[chris86vw]

been running the same damn VF diverters for ten years from 20-30psi... ive messed with things... always just go back to proper orientation, no shims.

Had a Bailey on my first 1.8t with a gt28/28rs for just as long, similar boost, close to 100k never an issue. No rebuilding beyond spraying some lube in time to time. no shims.

My current 1.8t and 2.7t run stock valves.

As I recall, forge started offering all these shims and other nonsense because of demand from the forum kids that convinced themselves that jamming a bunch of washers into their valves made them work better. Chris, you remember those days. Lots of bullshit mods in the 1.8t forums like "grounding kits" and other junk.

Good times.

I never understood the shims.. and oh wow ha grounding kits. I still see people ask about those from time to time! And don't think that the S4 community was spared from that stuff back then. I worked in plenty 2.7Ts that had them..