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Which dump valve for JDM WRX STI V7

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Old Mar 29, 2009 | 05:30 PM
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Default Which dump valve for JDM WRX STI V7

As title really

I bought a Bailey Motorsport DV for my previous WRX and it was pleasant enough but I wondered whether to push the boat out and get an HKS SSQV for this one
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Old Mar 29, 2009 | 06:06 PM
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How about the standard recirc DV that the car came with? They work fine.
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Old Mar 29, 2009 | 06:10 PM
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I think there is an APS one in the classified for sale, I had APS everything (almost) on my V7 and it seemed to be top gear.
By the way, its not mine for sale, I dont even know the fella selling it.
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Old Mar 29, 2009 | 06:15 PM
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mate u will get alot of different views on dump valves from here , alot will say the standard one is best and others will give u the answer u are looking for , it is a sore subject imo always gets people arguing !

i had a standard

and ive had a forge and i liked em both

mags
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Old Mar 29, 2009 | 07:39 PM
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I know it is a sore subject I am not new to these cars lol

That first guy sounded kinda grumpy
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Old Mar 29, 2009 | 07:43 PM
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indeed . u do get some people on here who who are quick to express an unwanted opinion !
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Old Mar 29, 2009 | 07:55 PM
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yes i agree some people do get a bit stressed when this subject crops up, but as its a question thats asked almost every other day and the search function is free to everybody these days i'm sure some people get fed up of seeing it asked, remember how Ken Block got on peoples nerves after a while

To your original question,i got the VTA DV out my system early on and i used to have the HKS SSQV and would say this is one of the best available along with turbosmart. But I was soon back with a Re circ because of the bloody noise and the hesitation felt when excellerating/changing gear.

So i'm with Mr RA on this one having tried both.

HTH

Aaron
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Old Mar 29, 2009 | 08:08 PM
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Originally Posted by azz250478
To your original question,i got the VTA DV out my system early on and i used to have the HKS SSQV and would say this is one of the best available along with turbosmart. But I was soon back with a Re circ because of the bloody noise and the hesitation felt when excellerating/changing gear.

So i'm with Mr RA on this one having tried both.

HTH

Aaron
Exactly the same as me

Standard OEM DV is the new HKS SSQV (As in white is the new black)

Last edited by Boyakasha; Mar 29, 2009 at 08:09 PM.
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Old Mar 29, 2009 | 08:16 PM
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Originally Posted by Pars
I know it is a sore subject I am not new to these cars lol

That first guy sounded kinda grumpy
Far from grumpy. Just offering you the best advice. The cars are designed to work with a recirculating DV, not a VTA one.
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Old Mar 29, 2009 | 08:33 PM
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OK Mr Grumpy
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Old Mar 29, 2009 | 08:35 PM
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I'm new too , on my last turbo car ( octavia vrs ) I just left it as it. Could some one kindly explain the difference between a "Recirculating type" and a "VTA" one ? I did notice when I changed to an induction fillter on the skoda I could hear the standard dump valve quite clear. I think they sound cool , I guess others don't.

Ben
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Old Mar 29, 2009 | 08:42 PM
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VTA does what it say on the tin and vents the air out of the valve into the air making that whoosing noise whilst the OEM one recirculates the air down the black hose into the intake which you would block off on a VTA.

Last edited by Boyakasha; Mar 29, 2009 at 08:43 PM.
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Old Mar 29, 2009 | 08:45 PM
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There is also a lot of talk about bore wash but I aint getting into that now.......
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Old Mar 29, 2009 | 08:47 PM
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Originally Posted by Boyakasha
There is also a lot of talk about bore wash but I aint getting into that now.......
You cant do that! what the hell is bore wash ??:
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Old Mar 29, 2009 | 08:49 PM
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basicly a vta goes wwwwwwwooooooooooooooooooooooooooooooossssssssssss sssshhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhtttttt ttttttttthhhhhhhhhhhhhhhhhhhhhh

and the standard goes .................................shhh.


simple
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Old Mar 29, 2009 | 08:53 PM
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So what we saying here is stay with the standard baby it came with ??? I do like the sound but I'm not shelling out good money for something that will down grade my motor even if it does go wwwwwwwwoooooooooooooooooooooooossssssssssssssssss sssssssssshhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh hhhhhttttttttttttttttttttttttttthhhhhhhhhhhhhhhhhh hhh

Ben
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Old Mar 29, 2009 | 09:51 PM
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Originally Posted by btwellz
So what we saying here is stay with the standard baby it came with ??? I do like the sound but I'm not shelling out good money for something that will down grade my motor even if it does go wwwwwwwwoooooooooooooooooooooooossssssssssssssssss sssssssssshhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh hhhhhttttttttttttttttttttttttttthhhhhhhhhhhhhhhhhh hhh

Ben
pretty much
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Old Mar 29, 2009 | 10:22 PM
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Originally Posted by btwellz
You cant do that! what the hell is bore wash ??:
I'll explain.

Air entering the intake will have been metered by the MAF sensor, which allows the ECU to provide the correct amount of fuel to maintain a healthy A/F balance. When a VTA DV is used this air is lost from the system when the valve actuates. The ECU is unware of this and still provides the fuel. With little or no air to burn the excess fuel slips past the piston rings and into the sump mixing with the oil. This is a condition known as bore wash.

By using a recirc DV this prevents this problem as when the valve actuates, the metered air is contained within the system.

There is a good thread on here that Andy Forrest posted up explaining why VTA DV should not be fitted unless the car has been specifically set up for it. Andy is one the most respected tuners in the UK and what he doesn't know isn't worth knowing so if he says not to use a VTA DV then people really should listen.

Last edited by MrRA; Mar 29, 2009 at 10:24 PM.
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Old Mar 29, 2009 | 10:23 PM
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if you want to get noticed even more, and scare people at bus stops then get yourself the hks ssqv...

wiley
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Old Mar 29, 2009 | 10:25 PM
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Originally Posted by MrRA
I'll explain.

Air entering the intake has been metered by the MAF sensor, which allows the ECU to provide the correct amount of fuel to maintain a healthy A/F balance. When a VTA DV is used this air is lost from the system when the valve actuates. The ECU is unware of this and still provides the fuel. With little or no air to burn with the excess fuel slips past the piston rings and into the sump mixing with the oil. This is a condition known as bore wash.

By using a recirc DV this prevents this problem as when the valve actuates, the metered air is contained within the system.

There is a good thread on here that Andy Forrest posted up explaining why VTA DV should not be fitted unless the car has been specifically set up for it. Andy is one the most respected tuners in the UK and what he doesn't know isn't worth knowing so if he says not to use a VTA DV then people really should listen.
Got it ! Make sense to be fair ! fuel in with the oil not a good thing !

Thanks

Ben
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