Technical dump valve stays open

[Louie Bee]

Beau,

You have the DV coming off the metal vertical pipe. That means it’s a MK1 pipe as the MK2 one is thinner at the recalculating outlet, which is why people with MK2s cut the L Pipe which hooks into the plenum chamber

Notice that the lower pipe has a wider outlet on the right than the upper one?

This outlet it has a restrictor (like a hat shape) to make the pipe outlet thinner!

If you fit a DV here, you should cut off this restrictor so the DV gets the full force.

Remove your DV mounting hose and check it’s been done

 

[beau]

Beau,

You have the DV coming off the metal vertical pipe. That means it’s a MK1 pipe as the MK2 one is thinner at the recalculating outlet, which is why people with MK2s cut the L Pipe which hooks into the plenum chamber

Notice that the lower pipe has a wider outlet on the right than the upper one?

This outlet it has a restrictor (like a hat shape) to make the pipe outlet thinner!

If you fit a DV here, you should cut off this restrictor so the DV gets the full force.

Remove your DV mounting hose and check it’s been done

where abouts on the engine bay is this really confused now

 

[Louie Bee]

LOL!!

It's vertical pipe at the front middle of your engine bay, with the DV Jubilee clipped to a little blue hose (upper section of the pipe), whit a hose to the air cooler at the bottom and a hose at the top to the Plenum Chamber (Inlet Manifold)

My picture is on it's side

 

[Jai]

where abouts on the engine bay is this really confused now

look at the pic, in the engine bay, left of centre, you see the black rubber hose, bending down, to the right is the blue hose with red valve, they are attached to the vertical pipe

 

[oldskoolmk1unoturbo]

if the dump valve is really quiet you need to drill out the hole on the dump valve take off

 

[F R O S T Y]

if the dump valve is really quiet you need to drill out the hole on the dump valve take off

Or Wack up the boost!! lol

F R O $ T Y

 

[beau]

its already been drilled out.

 

[Dunc Uno Turbo]

i'm sure with owning a UT, fitting a DV is prob one of the easiest jobs.

Dunc

 

[beau]

my dump valve is still quiet, every punto gt iv heard has been very loud, its loud but you cant really hear it over the engine!

mine looks plummbed in differently to this persons-

https://www.fiatforum.com/members-motors/161939-my-fiat-uno-turbo.html?p=1719909



mine-

his-

 

[Turnip]

I had a similar problem with the dump valve not dumping properly..... Now it works fine with my vacuum setup... Add a T junction from the fuel pressure reg..
Give it a go, see what happens?

 

[PaulDrage]

On my mk2 its mounted on that center pipe but on top - but it shouldnt matter at which point it is mounted, so is the problem the fact its not making a noise? or the fact the car idles a bit lumpy?
Mine is a lumpy cold idler - and I loves it!! can't beat the noise coming from the cherry bomb exhaust on idle

 

[beau]

it works and opens etc but is very quiet, and you just cannot hear it

 

[PaulDrage]

And you dont have any holes in your high pressure pipes/to or from the intercooler, turbo etc? no air leaks on the vacuum side of things either?
Does sound strange, mines rather a noisy valve even at low revs