As you know all VTA or OE recirc/aftermarket will help to spool turbo,if you are running dvless you will loose spool,second thing you will prolong life of your turbo with above mentioned DV setups.


Jura

 

He is wrong aswell, "wastegate chetter" is a nickname the sound has got over the years, I used to think the same , but it not the wastegate making that sound.

Google it

 

Ignore what these silly people are telling you, Dump valves are the single most important mod anyone should do to their car, the bigger the PPSSSSSHHHHH! the bigger gains you'll get performance wise so fit the biggest and loudest one you can get your hands on, plus the wimmins will be throwing their panties at you everytime they hear the PPPSSSSHHHHH! it's a well known fact wimmins love dump valves.

 

Understand that but still not gonna get any gains from a vta over the recirc set up so wasted money. So another reason to stay standard dumpvalve wise.

 

No overall gains,just as you are said is waste of money who have all ready OE Recirc.
I bought mine with Forge and for me is switching to OE recirc is waste of money and on mine desired boost level,not sure if its hold without the problem OE recirc.

Jura

 

And just to add my bit, a dv works more efficiently if it's mounted as close to the throttle butterfly as possible.

 

I have got a turbosmart DV, and i got to say, its sometimes a little too loud. It was on the car when i bought it so i haven't got round to taking it off yet. But i also have a few questions. I too would prefer a nice low noise when i change gear, i've heard a few cars with a fairly quiet chirping type sound and i was told that its an external waste gate. Do these exist, and do they make the same sound? I'm ditching the DV anyway cos its too loud, it'll be OE recirc for now i think. But would be good to get some sensible advice.

 

An external wastegate and a DV do completely different things

 

....and those things are;

BLOW OFF/DUMP VALVES
Blow Off valves are used to prevent compressor surge. Compressor surge is a phenomenon that occurs when lifting off the throttle of a turbocharged car. When the throttle plate on a turbocharged engine running boost closes, high pressure in the intake system has nowhere to go and is forced to travel back to the turbocharger in the form of a pressure wave. This results in the wheel rapidly decreasing speed and stalling. Using a Blow Off valve the excess pressure from the turbocharger is vented into the atmosphere or recirculated into the intake upstream of the compressor inlet.

EXTERNAL WASTEGATES
A wastegate is a valve that diverts exhaust gases away from the turbine wheel in a turbocharged engine system. Diversion of exhaust gases regulates the turbine speed, which in turn regulates the rotating speed of the compressor. The primary function of the wastegate is to regulate the maximum boost pressure in turbocharger systems, to protect the engine and the turbocharger.

I'm bored of it all now but the chatter sound that I was originally on about IS the wastegate (I googled it as suggested)
Actual wastegate flutter occurs under partial boost conditions such as partial throttle near the boost threshold. It sounds like FftFftFft not ShuShuShu and is caused by the rapid opening and closing of the wastegate at boost levels near the spring pressure. It is commonly heard more clearly and may be more prominent on cars with modified intake silencers, up-pipes, and or downpipes, and is not harmful.

 

is that from wikepedia ?

 

Sarcasm is fun I suppose. It's not really helpful though which is what this forum is supposed to be.
Are you saying that the info is incorrect?

 

nope , just sarcasm
its very helpful and interesting and im sure it will help alot of people out

 

Thanks guys, i always wondered what the external wastegates were for. My mind is made up now. OE recirc for me then. I've grown out of wooshing. lol.

 

Not sarcasm just the truth, it tells you there what "waste gate chatter" is. Its compressor surge and can **** your turbo over good a proper

 

Before this thread decends into hilarity or confusion for those trying to increase their knowledge, what Legacy gtb says is exactly correct, supported by Jura, 53WRX, Baz and others.
Dunk LOL.

There is another lesser known mod and that is to get a Black & Decker with a 5mm drill bit and drill a hole at the end of your downpipe. This allows air in to the system to ignite any unburned fuel in the overrun. If that doesn't work do a second hole. It may also make the exhaust note raspier. If a third hole hasn't helped just get a new downpipe and conclude you have no excess fuel in your exhaust

 

well got one fitted now.its an adjustable one to tighten the piston.or loosen.but i have to be onist.my car doesnt feel as quick as it did before i had it on!!!!.hmm maybe dump valve ant the way to go.theres so many choices.but think the standad one works better.i like the new twin supersonic hks one but cant warrent spending that much.ive only just brought my bugeye.its standad apart from exhaust.i plan to upgrade headlights.sti 8 spoiler and bonnet vent.full decal pack.uprated brakes to drilled and grooved.rear defuser under rear bumper.should look nice.just waiting for funds tomake it look how i want.but deffo not touching the engine.there quick enough without destroying a great car

 

i could always do with advice.i dont mind admiting im thick when it comes to these motors.so always best to ask forst before breaking somthing.all tips and advice is much appreciated.and can find me on facebook.rhys lovelock.cheers guys:P

 

like you i have a bugeye wrx it came with a baileys dump valve fitted and to be honest i like dump valves . but after listening to the views and opinions of members and subaru specialists on here its wise t keep standard recirc fitted ive just got one for mine

 

The reason why I fitted and aftermarket dump valve was because the standard OE valve leaks at higher boost pressures.

I agree that there are many useless aftermarket dump valves that make the car run worse.

I fitted a GFB Response valve that allows very high boost pressures without leaking. It is also fully adjustable between VTA and recirculating and anywhere in between, like having a volume ****.

The spring tension is also adjustable so that I was able to set up the valve to get a better throttle pick up. It also seems like lag is less when re-applying throttle.

I have set the blow off to mostly recirc, with a tiny amount venting to atmosphere. When driving normally it is quiet but when at high boost and hooning it makes a very civilised noise. I don't get any annoyed looks when letting off the throttle :-)

http://www.gfb.com.au/images/stories...release_NA.pdf

 

Blimey, proof that anyone can be educated. You gave me and others so much **** over this and now you agree with us .... LOL!

 

Had MY03STI 3 weeks now and came with baylies on it. I like the sound but should I get rid? Should I get a better forge one? Or OE?
Please help because I don't want the best car I have ever bought to be Fu<£ed!
Money no object

 

Id say forge recirc personally! its what i run and its great! Plus its behaviour can be tuned with the spring kit which costs not much more!

 

Omg dump valves
Why not just put a
I'm a **** and like teenage chav birds from McDonalds car park '
Sticker on the car

Do less harm to your engine and performance and real enthusiasts won't
Laugh at you behind your back

 

My question is, why do I always see high powered cars with VTA's on them is it's actually less efficient?

Everyone is saying OE recirc is more efficient, but at what level of power does that become false, if at all? Is it the same for other cars? I think I'm yet to see a Skyline without a VTA valve...

 

Jesus Christ!

Is this thread for real? Even with all the info put on a plate for them, some will still wish to waste £200-£300 on something that will:

A) Make your car run WORSE! Fact
B) Make you look like a Tit.

 

I'm glad I'm on 2-10 today otherwise by tea-time I'd probably be banned

How's little Charlie, Chris?

 

I had a HKS-SSQV VTA fitted, replaced it back for the subaru oem item and it now runs better, and feels like im getting more power out of it. Enough said.

 

So you dont have a dumpvalve then lord?

None at all?

You are aware all turbo cars should have one from the factory ..... if so are you specifically slating atmospherics?????

OEM recirc valves are the way to go for sure .... BUT .... they can leak and dont flow well enough when you start running alot higher than factory boost levels.

 

If theyre mafless ..... it makes no difference other than the plumbing (which is probably always custom on an uber powerful skyline anyway)