Mythbusters: S3 DV and blow-off discussion

[VladaS2]

Here is pic of my S3 diverter valve after one day run at 1.6 bar.

Looking for an alternative and want to open a discussion.

Which DV is recommended (Forge 006, 007 or...?)

I read on this forum that atmospheric ones do not run on our cars but as a alternative I am using now one ordinary blow-off from a diesel car and I am surprised how good it works. It doesn't have a racing response but even like that I managed to make better 402m time with it. And mechanic says atmospheric is better because DV will return hot air in the system, with atmospheric you take in cold.

[Acidburn]

I have an atmospheric dump valve on mine, apparantly the only one which works properly and keeps the idle, its a turbosmart one I purchased from dialynx. not bad but expensive.

[HPmuirt]

Strange that it did that in one day at 1.6 Bar, when so many folks on here run S3 DV's in homefried or MRC'd cars etc all of which seem to run at least 1.5 Bar with out problems

I suspect that you will disagree, but I think that was either a surge problem or something else, or maybe a faulty component, as I do not think that 0.1 Bar can make that much difference.

Cheers n

Si

[Acidburn]

Whats it just melted from the looks of things? is there anything that can get near it?

[sherv]

I was recommended Forge DV006, it's larger than the 007, had mine fitted with my remap a few weeks ago and you just get a smooth slight woosh/whistle and no great dump of air. Great!!

[Acidburn]

I used to get a bit of a noise on the standard s3 dump valve, the turbo smart one is not 2 bad would have liked a bailey one if they did one for s2's

[jameswkr]

That photo looks like a wind up to me. There is no way the outer casing is going to "give" before the diaphragm and certainly not in such a continuous split...
As previous posts 710Ns run high boost without problems ( in either orientation )...
Suggest the Dremel/ chain saw should be kept out of the engine bay.

[Acidburn]

It does look like the results a dremel will do BUT it could be something in the engine bay that has done it, the end also is melted which a dremel would not do, what was close to it in the bay?

[4WheelDrifter]

WTF happened to that? Did it get mauled by a dog?
Seriously, it looks like Dremel work. You must be refering to the deformed outlet tube.

[Acidburn]

Is there anyway it got some sort of heat or flame blown back down into it? I think something on the outsides done the main bit then melted inside. Doubt it would get that hot to do that sort of damage but you never know.

[4WheelDrifter]

The tear looks like it corresponds to where the seat of the diaphram is.

[Matt_D]

Forge recommended the 007 to me when i popped in their showroom.

The 006 is slightly larger and works fine so its up to you.

[UrS4boy]

You're kidding me, right? There is definitely something wrong with either the story or the photo. I am running a TT 710N on my 93 S4 AAN (RS2 spec) with a 1.9 Bar WG spring from 034 and MRC software. Regularly hits 26-27 psi and has done for a year with the 1.9 bar spring. Nothing whatsoever wrong with the 710 N. This story is missing something - maybe the chainsaw that someone suggested.

Dave F.

[VladaS2]

Story is not missing anything. Just one day of drag racing on a very hot day. All of plastic melted because of heat alone.

[HPmuirt]

Story is not missing anything. Just one day of drag racing on a very hot day. All of plastic melted because of heat alone.

Ahhhhhh, so we are not looking at the chainsaw masacre that someone did to the body then, just the fact that the tube has melted

That has surely go nothing to do with the boost levels you are running.

Cheers n

Si