Forge DV vs. Stock DV operation?

I praise the engineers at VW for using an electronic DV, but is operation is funky sometimes. For example, have you noticed in first gear taking off that the DV opens for a second in till you get on it?

So my question is: Does the Forge DV operate more like a traditional DV or will it mimic the stock DV?

Since the Forge DV has an additional mechanical spring and uses boost pressure/vacuum to open and close, does this change its operation? i.e. will it eliminate the random low boost openings when there really isn’t needed and will the amount of dump be more proportional to the boost level?

I understand that the remote solenoid will function the same, but does the spring change its operation?

Mike@Forge, What do you say?

Tyler

Our valve kit will mimick stock operation identically without any negative side effects.

Though our setup is essentially hybrid in it's operation, both electrical and mechanical, the electronic solenoid is just controlling whether pressure is acting on the valve to keep it closed or vacuum is acting on it to open it. This is done in exact accordance to the valve operation perameters built into the ECU which we do not change.

The OEM valve on the FSI application is actuated with an electrical signal from the ECU which is sent in response to data collected on boost pressure (read at the MAP sensor in the charge piping) and throttle position.

Any solely mechanical valve is actuated based solely on a pressure differential between the charge piping and the intake manifold.

Whether you prefer one method over the other, or you feel that one is better than the other on this or any other application, VW chose the former for this car and we are forced to work with that. Unless you're a software engineer who wants to rewrite the code in the ECU for valve actuation, you'll have to deal with it.

The OEM electronic setup controls when the valve actuates, for how long, and when it closes.

Our kit was and is the first and only setup to maintain that ECU controlled operation.

Any other mechanical setup does NOT allow the ECU to control when the valve opens, for how long, and when it closes, no matter which way you look at it.

If the ECU detects any change in valve response based on metered pressure in the charge piping during valve actuation that deviates from that which it desires, it can and will throw a soft fault code or a check engine light. Solely mechanical valve setups have been proven to have this effect.

Whether any faults from a mechanical valve setup will prove detrimental mechanically to the motor or not, immediately or over time, I cannot say, but if you want to maintain reliable stock like operation, without a fault code or check engine light, our setup is only option that will allow you to do so.

^^^ i <3 this guy :wub:

That, from you, wow! :wub:

Thanks Mike.

TG

Mike@Forge - Great info as always :thumbsup:.

Am I right in understanding from your posted info that the Forge DV, while working to the ECU 'instructions', will therefore respond according to the settings which a remap actions? I hope this makes sense because I'm not an expert but I'm thinking that the DV's whole behaviour is smartly reactive to whatever state the ECU is in, be it stock map or remapped ECU.

I'm not a tuner nor very electronically inclined at all, but my understanding of the system is that the perameters in the ECU that control the valve are based on a unique line of code that looks at input from other sensors (throttle position and boost [MAP sensor]), and actuates the valve accordingly.

When chipped/remapped, the line of code for valve actuation may or may not be altered by the given chip tuner.

They might just alter boost, fuel and timing and leave everything else alone, or they may go more indepth and change other things too. Obviously changing the settings for valve actuation to take advantage of higher boost levels would be ideal, if at all possible.

If they leave the perameters the same, the valve's actuation should still be in accordance with given input values, but whether or not the tuner alters these input values to a given extent in accordance with the higher boost levels and such, I don't know.

You would need to enquire with a given chip tuner to see if they have manipulated the perameters for valve actuation with their specific software.

This might not even be possible though, so I really don't know. Our kit, though, will work with whatever electrical signal is sent by the ECU, be it stock or modified in some way.

....I'll have a word with my Revo tuner about this :thumbup:.

Forge Spacer on Forge's DV from Stock DV

Hi Mike, let me first tell you that i'm really happy with Forge's Products on my 2.0T, which is matched with APR Stage 2+ and GHL TBE. But I did notice one thing, when I switch over from the Stock DV to Forge's DV the Spacer so call "blow off" is not as Loud as before. IS that normal??? shouldn't it be releasing the same amount of Air as before coz nothing on the ECU side has changed, just the DV side itself... Please inform.. Thank you

There is a difference in how the airflow passes through our valve in comparison to the stock valve, so that might change things acoustically, but it's not anything that we did intentionally.

We designed the valve to offer more airflow than the stock valve while still being cross compatible with the spacer and without, so optimal operation in that regard took priority over creating any specific sound.

Mike@Forge said:

There is a difference in how the airflow passes through our valve in comparison to the stock valve, so that might change things acoustically, but it's not anything that we did intentionally.

We designed the valve to offer more airflow than the stock valve while still being cross compatible with the spacer and without, so optimal operation in that regard took priority over creating any specific sound.

Click to expand...

Fair enough, Thank you for the reply.. :thumbsup:

BORA1.8T said:

Hi Mike, let me first tell you that i'm really happy with Forge's Products on my 2.0T, which is matched with APR Stage 2+ and GHL TBE. But I did notice one thing, when I switch over from the Stock DV to Forge's DV the Spacer so call "blow off" is not as Loud as before. IS that normal??? shouldn't it be releasing the same amount of Air as before coz nothing on the ECU side has changed, just the DV side itself... Please inform.. Thank you

Click to expand...

I think you will find that the amount of noise or dumped boost is proportional to how much boost you had before the valve opened and how much vaccum exists in the lines when the valve is triggered.

Seeing as we have FBW throttles, which restrict the amount of vacuum (when you let off the throttle, the butterfly is acutally not completely closed like a traditional mehcnical system) it may not make much of a difference.


High boost/RPM then off throttle should create a larger vacuum and open the Forge DV more so then low boost/low rpm little vacuum conditions.

Anyone comfirm?

TG