Dump Valve King Thread - A discussion

[Dub-Se7en]

running the bailey again now, i have previously ran a blitz and an ssqv and the bailey seems to operate the best on my setup, possibly due to the weaker spring. i was getting a squeek of compressor stall then the dump which made the car sound fecking stupid, the bailey greatly reduces that.

 

[LONGY0710GTTURBO]

just got my dump valve off ebay apparently a universal bov however came off a 200sx, ten mins in the bleeding rain later its all fitted. Looks very much like the bailey dump valve. Sounds very nice, not too loud just nice and makes all the macdonalds crew want to own a turbo.

waaaaaaaarp tishhhhh

carlsberg dont make sounds
but if they did
they would probably be the best sounds in the world.

The dv i have is spring return and seems to be fine. Gonna keep an eye on it but all seems fine at the moment.

Longy

 

[hybrid_G4E]

I would like to add some info. A blowoff valve is a more elegant solution to this problem by allowing the turbo to "freewheel" when the throttle is closed (equalizing the pressure on both sides of the turbo). Unlike a dump valve a blowoff valve can be used at multiple boost settings without reconfiguration.

here's some more info.

What are your views on blow-off valves?

"Manufacturers have been using blow-off valves, or bypass valves, for a long time for a specific purpose - to reduce noise, not increase it. It is also meant to improve the smoothness of the turbocharger from deceleration to acceleration."

"The whole range of show-off valves that are running around are a pretty inefficient way of making a noise and people justify it by calling them blow-off valves. If I need to have one on a vehicle for a specific reason - I mean, a good blow-off valve is worth its weight in gold on a racing car working through the gears - the HKS valve gets my vote every time. They're very reliable and they don't rely on a piston bouncing up and down inside a bore made from a different material -something that's just waiting for dust to get in and jam it. The majority of them are just show-off valves that do nothing except wake the neighbours."

"Plumb-back blow-off valves are good where your management system works off metered air - it's crucial for the management to know how much air is running around. For MAP sensed vehicles that don't measure airflow, then you can vent the valve to atmosphere or do what you like."

"Ignoring the management part of the equation for a minute, I don't think plumbing the blow-off valve back to the intake is of major benefit."

http://autospeed.com/cms/A_1742/article.html

 

[wee-jo]

Dump Valves???????

Hey guys, in your opinion what would be the best dump valve to go for? I've looked at the HKS SSQV one but I'm still undecided. Probably get one from nengun performance as they are by far the cheapest I've found so far.

Thanks guys

 

[Gilly2006]

if you want to go for the best design then i would say the HKS but i personally don't like the sound they produce, i personally like the Blitz bov which are also good. baileys bovs tend to stay open when not on boost but do sound good. but its all down to personal preference. personally i would go for the blitz but thats me. hopes this gives you an idea anyway.
Mj

 

[wee-jo]

yeah man, I'm just looking for the most efficient one cause someone told me the louder it is the less gas is being realeased at a slower rate etc

 

[Adam_Glanza]

and if you believe that then you might be intrested in this special one off bag of golden horseshit lol.

they all dump fast enough to release the boost pressure mate!

its just down to personal preference, and i cant wait to get rid of my hks bov lol

 

[Aidan@EP-styling]

As Gilly said, the blitz would be a good one to go for - and afaik they are spring rate adjustable

buy from www.toytuning.com

from what i hear about nengun is that they are very slow to deliver there parts

 

[wee-jo]

Ah rite cheers man, how whats wrong with your HKS one? Yeah the blitz one is probably the better option then, yeah nengun do take a while about 3 weeks I think but its likealmost £100 cheaper on nengun incl delivery cause its trade prices they sell their products at

 

[yan]

Just try a search, i think there a post of vote somewhere, hks vs blitz vs etc

 

[Adam_Glanza]

nothing wrong with the hks, it just sounds stupid imo, so high pitched and chirps like a bird lol cant stand it

 

[Gilly2006]

nothing wrong with the hks, it just sounds stupid imo, so high pitched and chirps like a bird lol cant stand it

agreed! really don't like the sound of it, and plus when you hear the same sound on a scooby or another turbo charged go you know what it is! instead of listening to another car and thinking ooo whats that bov! sounds ace! lol!

 

[yan]

Ur rite gilly

 

[craig_94]

dump valves???

right, first off thanks for replying to my induction kit thread. no what i want to know is what is the better dump valve to go for, theres two in the parts section for sale a HKS ssqv( brand new for 150 quid) and a standard HKS bov off(90 quid). or none of these and a different one all together???!!!

cheers

craig

 

[Nwimie]

its mainly down to preference on which sound you prefer.

 

[rb69]

I can only vouch for the newer HKS SSQV. They won't or shouldn't leak at all and the build quality on them is excellent. They have a unique sound that some love and others hate, try looking them up on Youtube if you want to know what they sound like. Like Nwimie said, it's personal preference really.

 

[Kelly]

^ same as rb69! i have the newer style hks ssqv i love it so loud ! ha!

it actually suprises me every now and then on how loud it can be!

 

[Dub-Se7en]

have a read through this

my current fav is the greddy type RS

 

[Nwimie]

buy a few and swap swap with mates sometimes jsut for change lol.

 

[craig_94]

cheers guys!!!