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dump valve fitted....engine lumpy

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Old 27 September 2007, 08:11 PM
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DirtyScooby
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Unhappy dump valve fitted....engine lumpy

I've fitted one of these.......



to my Newage 04 WRX SL and now the engines/idle is lumpy!

The car had the standard re-circulating dump valve before and now I've fitted the new one I've got 2 pipes left - a large pipe (1.5inch approx wide) from which I had to undo a very hard kinda sprung loaded clip to remove the standard re-circulating DV from (after undoing the 2 bolts from intercooler)and also a smaller pipe.

When I started it up with both pipes disconnected it was lumpy but when I connected the smaller pipe to the gold nozzle you can see in the picture it ran slightly better but the bigger pipe is now not connected to anything!

Can someone point me in the right direction as this is the first thing I fitted to the Scooby myself and now I'm confused....should the large pipe have a bung in it or something and should I connect the smaller pipe to the gold nozzle or not

It didn't come with any instructions as I got it for a good price from Ebay and although I could email the seller now I thought it would be quicker on here with the knowledge you guys have and I need to get it sorted for the morning as I drive it to work.

Cheers
Graham
Old 27 September 2007, 08:17 PM
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White-Un
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the large pipe should be blocked up with a bung mate
Old 27 September 2007, 08:21 PM
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Thanks for the reply and once thats done it will run ok?

where do I get a bung from?

or could I tie it up for the time being?

Sorry for all the question but I'm a bit of a numpty when it comes to stuff like this
Old 27 September 2007, 08:22 PM
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also do I leave the small pipe diconnected altogether?
Old 27 September 2007, 08:25 PM
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no mate thats a vac hose that goes on the small brass one on the dump valve.
Old 27 September 2007, 08:28 PM
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Old 27 September 2007, 08:34 PM
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Originally Posted by White-Un
no mate thats a vac hose that goes on the small brass one on the dump valve.
On my new Dv you mean? if so where is that?

I'm now even more.

What do I do with the 2 pipes that I have disconnected now?

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Old 27 September 2007, 08:34 PM
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Originally Posted by [Davey]
WTF!
Old 27 September 2007, 08:38 PM
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What was wrong with the one subaru fitted? stick it back on ebay and buy a proper one(if there is such a thing) or leave the OE one on just as Subaru intended.
Old 27 September 2007, 08:39 PM
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Originally Posted by DirtyScooby
WTF!
Sorry im just a bit shocked!
Old 27 September 2007, 08:45 PM
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Originally Posted by [Davey]
Sorry im just a bit shocked!
At what?
Old 27 September 2007, 08:47 PM
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get a bung from demontweeks or from here or ebay, put the little pipe on the only place it will go on the dv,and can i recommend you don't fit anything else yourself
Old 27 September 2007, 08:49 PM
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Originally Posted by T5OLF
What was wrong with the one subaru fitted? stick it back on ebay and buy a proper one(if there is such a thing) or leave the OE one on just as Subaru intended.
I just don't like how long sometimes the turbo takes to spin up and on roundabouts at times is hair raising waiting for it to kick in, I read the blurb on the adverts and I quote......

'Gains back 7-9 BHP by stopping the turbo ‘stall’ effect of your existing Bosch dump value'

so I thought that it might cure the problem
Old 27 September 2007, 08:50 PM
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Originally Posted by azz250478
get a bung from demontweeks or from here or ebay, put the little pipe on the only place it will go on the dv,and can i recommend you don't fit anything else yourself
Will do and I won't...promise!

I thought a DV would be easy install...even for me
Old 27 September 2007, 08:55 PM
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Originally Posted by DirtyScooby

'Gains back 7-9 BHP by stopping the turbo ‘stall’ effect of your existing Bosch dump value'
A VTA dump valve does not give you ANY extra power, it merely helps with the spool up after a gear change.. You'll also notice you might get a little puff of soot from your exhaust after on boost gear changes as the MAF sensor will be metering for the 'dumped' air.
Old 27 September 2007, 08:56 PM
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not sure thats true , ebay can really rip you off sometimes! check on this forum before buying anything on there, there are a lot of experts on here only to glad to help, i'm not one of them. you might get a bit of mickey taking but you will be helped and its worth it if it saves your car from damage
Old 27 September 2007, 08:57 PM
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Just take care what you buy of ebay, there is a lotg of crap on there. I very much doubt a DV will add 7 BHP. If your going to fit one then buy a good one like the HKS one. But to be honest the standard one is perfectly good enough. Save your money up and buy a good exhaust system and an air filter instead.
Old 27 September 2007, 08:57 PM
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Originally Posted by DirtyScooby
On my new Dv you mean? if so where is that?

I'm now even more.

What do I do with the 2 pipes that I have disconnected now?
large pipe put a bung in it small pipe connect to gold coloured nozzle on top of new dv the one that you have allready connected it to in first post
Old 27 September 2007, 08:58 PM
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Originally Posted by DirtyScooby
I just don't like how long sometimes the turbo takes to spin up and on roundabouts at times is hair raising waiting for it to kick in, I read the blurb on the adverts and I quote......

'Gains back 7-9 BHP by stopping the turbo ‘stall’ effect of your existing Bosch dump value'

so I thought that it might cure the problem
As you rightly say, it's blurb. You will gain NOTHING. If you like the sound fair enough but don't expect any gains.

A lot of the budget ones can make the car a bit hesistant and stuttery on part throttle applications. As above, block the recirc pipe and attach the vacuum hose and bot onto your intercooler. They are the only connections needed.
Old 27 September 2007, 09:03 PM
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you need to stick one of these somewhere

Last edited by paul39; 17 May 2009 at 02:05 PM.
Old 27 September 2007, 09:23 PM
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The smaller pipe that was on the stock dv needs to go on the brass part of that one and the larger pipe that you removed from the stock dv needs to be bunged up with a 32mm bung and you will need a jubilee clip to secure it . It should of come with it ..... If you haven't bunged that hole you won't get far when you put your foot down.

Tbh I would stick with your stock dv or like above buy a good one like Hks as you will most likely get a air leak with that one
Old 27 September 2007, 09:31 PM
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Thanks guys for the comments much appreciated.

Only had mine for 4mths so modding a newage is all Jap to me!

in future I will ask on here before buying
Old 27 September 2007, 11:15 PM
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If you want better spool up then you should look into derestricting/decatting the exhaust system. There's loads of threads in Technical section
Old 27 September 2007, 11:40 PM
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Originally Posted by scubasteve
If you want better spool up then you should look into derestricting/decatting the exhaust system. There's loads of threads in Technical section

Listen to this guy.

And don't listen to marketing bollocks.

Spend money on something that works, rather than something that sounds like the handbrake on a 12tonner
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