pimmo2000

iTrader: (6)

GFB Dump valve, are there any risks to my car if say its fitted incorrectly ? Or anything else?

Paulo P

iTrader: (42)

There is a risk of making it sound like an rs turbo

GC8

There's a serious risk to your credibility.....

FirebirdUK

Hehe - I tried to fit the GFB Stealth FX onto my MY53 STi...

Ended up having a problem where I couldn't shut the bonnet on the car - no matter how hard I slammed it shut it would pop back up...

When I did manage to get it shut (after sparying bits with WD40 and prodding with a screwdriver, I wasn't able to pop the bonnet)

Wasn't anything to do with the dump valve, just a dodgy bonnet catch...

Never did get round to fitting it to the car before I sold it on...

Still got the dump valve in the garage somewhere... (paid £300 quid for it) Ought to dig out it out and put it on "that site"

nataz

£300??!!??

Did I just read that right?

pimmo2000

iTrader: (6)

I have to at least try it for a few days

alloy

its hard to fit these wrongly but if you do you will have low boost. Go for it i say i have the hks ssqv on there more of a chrip than a dump slightly more subtle but equally fun

FirebirdUK

Yup...

It is a shiny black one though (it's the GFB Stealth FX WRX version - you could adjust the pitch and volume of it)

corradoboy

You risk overfuelling, poor idle, jerky gear changes, backfires, cat damage (premature deterioration and shattering), borewash, premature cylinder lining wear and last but mostly, you risk looking a right prat

If you want the sound remove the intake silencer and fit a decent panel filter. £40 quid or so and 30 minutes to do. The car will run sweet and you'll hear the OE DV blowing off as well as increased induction noise on spool-up.

unfeasablylargegonads

iTrader: (3)

rare but recently seen a car (not my own) that started to stall ocasionaly due to the spring in new dump valve being too weak and not closing properly.

alcazar

iTrader: (2)

^^^^^^^^^^
What he said

If VTA d/v's were ANY good, wouldn't Subaru themselves, or Prodrive, fit them? And since they DON'T, there has to be a VERY good reason why not.

Read Corradoboy's post. Can you afford the repairs? Or a new engine? Do you want to have to?

Alcazar

marcymarc555

Seen as though decent rs turbo escorts n fiestas fetch more money than the early scoobs the risk of sounding like an rs turbo sounds quite good.

pimmo2000

iTrader: (6)

I want the DV to decrease turbo lag, I dont actually want the sound...I was planning on piping the air away as to remove noise.

pimmo2000

iTrader: (6)

Subaru doesn't fit the best turbo, the biggest brakes or the most expensive CD player... I don't see your logic

ALi-B

iTrader: (1)

Stick with the original one then An aftermarket one won't reduce turbo lag.

They are only there to dampen the shock waves produced by snapping the throttle shut to prolong turbo life, ask your favorite WRC rally team why WRC rally cars do not have dumpvalves fitted. Fitting an aftermarket one gives no performance advantage - only noise.

I can think of much better things to throw £300 at that WILL give performance gains.

V4JDMSTi

iTrader: (2)

i spoke to a very reputable scooby specialist in my area where all the guys have between 10 and 20 years of scooby experience each and they advised me that it won't harm the car at all as they come fitted with a dv as standard. if you want some noise fit one, if you dont leave the standard one on it! was what i was told.

like any topic on any forum you'll get conflicting answers and i'd say go with what you want to do at the end of the day. i've had my bailey vta dv on mine for a good few months now and i like the noise. not too loud and different from the usual dvs.

GC8

If the advice that you were given is exactly what youve written here than Id suggest keeping well-away from the so-called experts, because theyre talking ****e. An Impreza has a re-circulating bypass valve which doesnt affect the volume of metered air which enters the engine. This thread concerns a vent to atmosphere bypass valve, which does.....

corradoboy

On lift of when using a VTA DV, the air within the intake system is suddenly lost but it has no further sensors to pass for the ECU to react accordingly with the fuelling, and so fuels for lots of missing air. As there is too much in relation to the air induced, some get burnt but most ends up in places where it shouldn't really be. Either forced under compression behind the piston rings washing off the lubrication film and then proceeding over time to thin the sump oil, or pushed into the exhaust where if it doesn't ignite it coats the cats with fresh petrol and if it does, the resulting backfire can shatter the cats and affect the action of the exhaust valves due to a sudden negative pressure. Whatever happens, the car will briefly run in an erratic and uncontrolled way which is not desirable, even if the silly noise is

Many people who have switched back to OE valves have reported that their cars run much better, leaving the conclusion that the positive effects of a VTA are purely placebo to justify the expense. As has been stated many times, unless your boost pressure is way above standard levels which cause the OE valve to leak then there is no performance advantage whatsoever and the thing is merely a bling chav fashion accessory.

Clarkie172

sorry to be stupid but whats a VTA? is that the standard re-circ DV?

SJ_Skyline

VTA - Vent To Atmosphere (which by definition does not recirculate)

SJ_Skyline

Going on similar logic - Subaru fit catalytic converters to their cars therefore these must be the best!

...and don't get me started on the paint!

alcazar

iTrader: (2)

Depends if you want it to pass it's next MoT or not

Alcazar

Buckrogers

What approx level boost are you talking about? My max boost is 1.55 bar. Is that way above standard?

Buck

pabs

If you're not worried about any of the risks suggested by other members on this thread and you want to save spending stupid money simply remove the rubber pipe which comes from the outlet of the OE valve and block off with something - the noise is just as loud as the expensive valves and the car will run just as bad!

remfanuk

er...intake silencer? what that? i would go for that if i knew what it was and where it was i would remove it? what is it supposed to do? anyone got any instructions on how to remove it and is there any reliability/risk issues if i do?

thought the WRC cars had a dumpvalve or something that makes them "chirrup" as they come off the throttle....if not a dumpvalve...what is it?

flat4_ire

thats savage high! what turbo u got?

badboy-scoob

dump valves sound amazing - everyone can hear u comin when u got one of these fitted!!

marcymarc555

*Sigh*

corradoboy

The intake silencer is in the O/S wing, and is there simply to quieten down the induction and DV blow off as many ordinary people would find it childish and ridiculous Whereas, us lot love noisy cars, so we can remove it

Quick guide. Remove the (so-called ) ram-air scoop (don't quite know what it air rams being positioned directly behind a bonnet with a rubber seal) by removing the 2 obvious bolts and pulling it off. The plastic tube it was connected to which is now poking out of the hole in the O/S wing is the resonator (or intake silencer). Beside this hole and next to the airbox is a 10mm nut, remove this. Now the harder bit. On a WRX remove the foglight surround and foglight, on STi just the fog cover (or you can remove the headlight) to reveal another 10mm nut, again remove. Now remove the front O/S wheel and approx 5 plastic pop-clips which hold the wing lining in place (not the screw headed ones) and peel back the plastic wing liner. the resonator can now be pulled out of the wing. Replace all the fittings/wheel/lights etc. Duct tape up the hole left between the engine bay and the wing,and wedge cloth into the other holes where wiring looms emerge etc. Finally, use a length of rubber hose to form a seal around the airbox where it meets the wing. Fit a decent panel filter such as JR Racing, K&N or Green. I also cut a hole in the WRX foglight mounting where there is a mock grille in the surround trim which fits over it to allow a bit more air into the wing.

Should take about 30 mins, and apart from a new quality air filter is FREE

You can see what it looks like on here....

s-man

It's groundhog day.....