Bailey DV30 recirculating dump valve

[knight]

Can anyone advise on how to fit the DV30 in an SE.
Just want to get it right first time.
Has anyone fitted the DV30 themselves?

[Sy V]

The DV30 is the recirculating version of the 24, correct?

If so, Darren's got one, I think.

[John_W]

Knight,
The DV30 is the bog-standard fitment. I've got one and so have others. It takes about half-an-hour to fit. The only thing to get absolutely right is where to cut the intake plenum hose. Just make sure it's in a place where your valve will fit.

See these instructions which are not for a DV30 specifically, but the fitment is the same.

The only additional plumbing you'll need compared with the write-up is sticking the recirculation pipe back into the air filter can. I did this using some plumbing plastic bits and a "universal" radiator hose, but others have used push-fit/sealant. You'll need to cut a hole in the side of the can or in any other convenient place. I plumbed mine into the "dirty air" side ie the dumped air goes through the flter again. Some may prefer to plumb it into the "clean air" side just in case any air is sucked back momentarily during operation, but the black deposits on my air filter at the input junction tell me I made the correct choice.

Also do a search and you might find a specific write-up for the DV30 which may or may not have disappeared since it was posted.

John

[ailwyn]

The DV30 is the recirculating version of the 24, correct?

I could be wrong, but I thought the DV24 was the "to-air" and the DV34 was the re-circulated version, or on the other hand it could have been the trumpeted to-air version

Ailwyn

[John_W]

I could be wrong, but I thought the DV24 was the "to-air" and the DV34 was the re-circulated version, or on the other hand it could have been the trumpeted to-air version

I don't know what a DV34 is, but a DV30 is:

DV30 Piston Re-Circulating Dump Valve
All the benefits of Baileys piston design but with less audible 'whoosh'. The DV30 was originally designed as a direct replacement for the factory fitted Bosch dump valve found on a wide variety of cars...

details here.

John

[ailwyn]

My second guess was correct, the DV34 is the trumpeted dump valve, which is designed to amplify the boy racer effect.

Ailwyn

[Enright]

John,

How did you manage to plumb yours into the dirty air side?
I thought the dirty air came up through the middle, so your pipe would have to either go through the lid or down past the BSV and into the one that comes up through the wheelarch.

I guess that would make it a longer run, but then it could make for a much tidier installation. Having said that, I'm then confused by the statement about black deposits on the filter next to the junction.

Do you have any pics?

[Enright]

[John_W]

Sorry, Neil. Didn't see the question.

I plumbed it into the side of the canister. I believe that's the "dirty" side. I'll check the manual to verify.

I'll put a picture up in a bit.

John

[ailwyn]

I plumbed it into the side of the canister. I believe that's the "dirty" side. I'll check the manual to verify.

I think that's the clean side as the intake comes from the bottom into the centre of the filter and the air to the turbo goes from the side of the bin.

Could be wrong though.

Ailwyn

[Enright]

That was exactly what I thought.

[GeoffSmith]

When you change the air filter, which side has got flies on? That's the dirty side!

[ailwyn]

When you change the air filter, which side has got flies on? That's the dirty side!

No idea, I still have 40k to go before it needs changing

[Enright]

I got a 69p tank overflow fitting from Wilkinson's, and trimmed off any extra bits of plastic that weren't required.
Then I cut a similar sized hole in the top hose, and poked the fitting through.
A short piece of water hose and 2 jubilee clips were used to fit the valve to the fitting on the top hose.

Someone recommended to use fish-tank air line for the operation pipe - it worked for about half an hour!
Then, because it was only made of polythene, the heat from under the bonnet combined with the vacuum caused it to collapse and block. Great. Fortunately a local motorists discount shop had some perfect-sized thick-walled black tubing.

Now at least it worked, but the chavvy "whoosh" noise at every gear-change or deceleration was a bit too "Fast and the Furious" for my liking.
Then I found the perfect solution: a combined plug and overflow system for a washbasin from a DIY store!

I cut a hole in the "dustbin" half way up directly above the BSV, mounted the overflow on the inside, and the little flexible corrugated pipe pushed straight into the DV30's exhaust. Perfick!

So I took it out for a test run. Blissful silence for about 200 yards. Then: Pop. Whoosh. Pardon?
The pressure pushed the corrugated pipe back OUT of the DV30's exhaust.
Another short length of water hose and a couple more jubilee clips were required.

With these fitted it's since been mercifully silent and hasn't uttered a squeak. Here are a couple of pics of the finished result: