Dump Valve Orientation

[Jamo]

Having messed about with some dump valves last week with Sal_S2, Volcano RS and S2 Nip

We ended up putting the dump valves in the reverse orientation of the stock dump valve as in the normal position the valves weren't holding pressure.

Check the thread below, it's so coincidental that over in the US they had the same problem with the same make valve!

http://www.motorgeek.com/phpBB2/viewtopic.php?t=20614#241459

Now this doesn't work for all dump valves, I've found over time that some DV's don't like being reversed and some do.

[andyg plym]

interesting read that, my forge has a green spring in it,didnt realise you could order uprated springs for it? i think mine is getting sloppy

[s2_southwest]

i can understand why the valve operates better in reverse orientation.

My understanding is that in normal line up the turbo side is trying to push the valve open, only for it to be held shut by the spring until it opens under vacuum.

When its connected in reverse, the turbo side is pushing the valve shut, rather than open, this means when it opens there must be more turbulent flow as the air is designed to only flow in one direction isnt it!? or am i talking bull haha

interesting point there anyway jamo

[volcano rs]

i don't know how they work anymore so i have bought a blow off valve to atmosphere my forge ones are for sale if anybody is interested .

[quattronutter]

so you have been dumping upside down, sounds like a right mess

[volcano rs]

so you have been dumping upside down, sounds like a right mess

i've tried it both ways but it dosen't seem right .

[terrybullwon]

I need one more, for my two valve set up but.. this makes me think is it just better ti go with a BOV?

[topsparky]

i've tried it both ways but it dosen't seem right .

that'll be his age
oo eer

[A80Avant]

i have the latest version of the 006DV from forge and forge suggusts normal orientation with blue spring.I have no problems whatsoever

[Jonas_R]

Well the dude on motorgeek that is testing the valve seems to forget that he need to apply pressure on the small pipe/hose aswell If you dont do that only spring force holds the valve shut.

Spring power combined with the pressure coming from the small hose holds the valve shut. Since one now has more boost on top of the piston compared to the pressure applied at one of the larger holes on the DV.

When changing gear, vacuum is applied on the small hose which now means that instead og spring force + boost pressure you now have spring force and vacuum pulling. Now the boost pressure can open the piston and dump the air.

However when testing I also found that reversing the 006 gave a better and more airtight solution. However do not reverse a Bailey DV30, couse that dont work reversed, this fooked my RS2 turbo

[s2_southwest]

Jonas, on the subject of the DV30 from Bailey, how do you rate them? Ive had quite a few forge ones now and im neither impressed nor un-impressed with them. Anyone else had good/bad experiences with Bailey?

[Jamo]

Baileys DV30, that's one of the valves I had problems with.

They are o.k but you must service them, the piston stick unless it's constanly lubricated with WD40 or some other alternative

[Jonas_R]

Well my experiance was very short and painfull with the bailey dv30, so cant really comment on the performance. But Iam diffenly sticking with my forge now.

Cheers

Jonas

[urquattro-island]

so

Having messed about with some dump valves last week with Sal_S2, Volcano RS and S2 Nip

We ended up putting the dump valves in the reverse orientation of the stock dump valve as in the normal position the valves weren't holding pressure.

Check the thread below, it's so coincidental that over in the US they had the same problem with the same make valve!

http://www.motorgeek.com/phpBB2/viewtopic.php?t=20614#241459

Now this doesn't work for all dump valves, I've found over time that some DV's don't like being reversed and some do.

this works then, they have done this for quite som time now, in sweden, with the original dumpvalves. cool..

[nip]

my 006 is for sale too