Valve to dump ex. gas ?

[sorens2]

Hi guys

Anyone seen this in use ?

It´s a "T" to weld on the downpipe. It opens @ 1 bar boost and then the pressure in the exhaust is gone.
Any comments ?
Except from that lovely noise...

Søren S2

[sorens2]

My own version (copy)

Søren S2

[Greg_S]

doesnt look like a bad way to make a cheap external wastegate.

[Doug_RS2]

I don't think it is a wastegate Greg.

You have it in your downpipe or exhaust and it opens so you have a low backpressure exhaust system on-boost - the advantage being - when you are driving slow(around town) you can have a higher back pressure, silenced, exhaust. You basically have 2 exhausts.

The pic doesn't show the t piece - good idea - but does it work well??

[Mark Halligan]

No its not a WG, they are sold by ATP in the states, more info here:

http://www.atpturbo.com/root/releases/release091004.htm

[Greg_S]

Ive never heard of that before, I can see the logic in doing it, gonna have a read of the article.

Greg

[Beetie]

The video on the site doesnt give much away, they only do one 'normal' driving run and about five full throttle drags!
Like the potential though....

[Beetie]

Not only that where abouts under our cars is there going to be any room to fit them onto 3" systems?!

[S2central.net]

Interesting looking device that...

[S2central.net]

Not only that where abouts under our cars is there going to be any room to fit them onto 3" systems?!

D'uhhh - no the point is you fit it onto a stock exhaust. This valve claims to give the effect of a 3" system. Logic seems fine as this would certainly be much less restrictive than silencers etc etc

Anyboy wanna be a guinea-pig with a fitment before the CATs ?

Gotta wonder what the MOT inspector would say if he saw it.

Personally I'd like it to open earlier than 1bar boost - wonder if that is adjustable ?


Paul

[Beetie]

D'uhhh - no the point is you fit it onto a stock exhaust. This valve claims to give the effect of a 3" system. Logic seems fine as this would certainly be much less restrictive than silencers etc etc
Paul

Ok so i misunderstood!
Cheers Paul!

[Greg_S]

Yeah I think it is adjustable for that, dont know that it would pass the MOT especially if its put before the cats.

Greg

[Doug_RS2]

There are a few new cars out there with similar things to bypass silencers on full throttle - RS6 springs to mind.

[S2Roo]

How well would it seal when not on full throttle, given that it will get hot and expand, as well as the effects of corrosion over time????? Or could it Jam open?? How would you map it if you had a modified chip????

You should be able to put in a pressure regulator to adjust what boost pressure opens it.

Roo

[s2driveruk]

yeah I was going to say the RS6 has a similar think lurking in each pipe from what I have read.

David