Dump Valve

[B3AR]

Hey guys, maybe you can help me...

I recently bought a Bailey DV for the Legacy, fitted it, and while it does go tshh, it also goes pfffurrrb, like someone blowing over a bottle. I had a look while someone revved the engine and you can see the dump valve move when the throttle is let off, then it goes up and down very quickly doing the pfffurrrb noise. Anyone got an idea why?

[Dalthegooner]

Is it a twin piston dump valve (DV26 or 36 I think but don't quote me) as the single piston is known to leak.

[B3AR]

DV26, twin piston type, it's almost as if the spring isn't strong enough.

[Dalthegooner]

It could possibly be that. I have heard of it before and I believe that they do do uprated springs.

[The Daddy]

sounds like a leaky dv. send it back and ask for an exchange. baily are pretty good.

[B3AR]

hmm, maybe I need to try and explain it again, have read what I wrote and it's not clear...

The DV holds the boost when I'm accelerating. When I let off at low boost the valve opens and shuts several times quickly making a phurrrb noise, when I let off at a higher boost level it will go tssssh, then goes phurrrb again. Could it be that the spring isn't strong enough? Is the DV26 adjustable?

[The Daddy]

when you're in sittingbourne next pop round and ill have a look my contact number is on my website: www.topmarqs.com

[B3AR]

I live in Sittingbourne lol! I've just removed the bloody thing cos it was soooo annoying! But I can put it back on it 2 minutes if need be.

[jonsey28]

Mine doe's this aswell, i have the Bailey also. I thought it was o.k as my theory was that as your not creating enough boost low down the pressure isn't enough to fully open the valve, hence why you get a different noise and the valve doesn't open fully. My old starlet used to do this as well, but that was a different valve but i cant remember the name, sorry.

This might be wrong, but it could help.

Rob.

[Deano 666]

<< hmm, maybe I need to try and explain it again, have read what I wrote and it's not clear...

The DV holds the boost when I'm accelerating. When I let off at low boost the valve opens and shuts several times quickly making a phurrrb noise, when I let off at a higher boost level it will go tssssh, then goes phurrrb again. Could it be that the spring isn't strong enough? Is the DV26 adjustable? >>

IT COULD BE YOUR ACTUATOR ON THE WAIST GATE ON YOUR TURBO MAKING THE NOISE AS IT OPENS (WHICH IS NORMAL), AND YOU ONLY HERE IT AT LOW BOOST BECAUSE THE DV IS NOT AS LOUD. IS IT LIKE A FLUTTERING SOUND?