dump valves

[whitecossie]

how many people run them ? i havent had 1 on my cossie i use to like the chatter but it gets a bit to much sometimes ,ive tried my mates on today and it sounded class but ill proly get sick of that and go back with the chatter,

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[NUTTIN RILLA]

Well mate i`ve always had a dump valve on my cossie, but i tried it without for the chatter which is good but now im stg3 the both sound great together, the debate could go on forever, but its so easy to change back to whatever you feel like, good luck

[bazpro]

i prefer the chatter myself but some people on here say it knacks your turbo.

[filthyrichie]

dump valve gets the heads turning i always find

[G2 FSR]

i had 1 fitted up until a couple of months ago. They say there not much cop for the turbo and that. But i have a graham goode kone air filter and that sounds wicked, much better than any dump valve

[grunter]

ive gotta spec r one one mine sounds great and still get loads of chatter to

[whitecossie]

well ive managed today to make a old amal valve close the vacum off to the dump valve and open it at a flick of a switch so i dont even have to open the bonet to take the pipe off , i knew these missle swtich thingys would come in handy .the other 1 is for my fan it has been a right twat only working when it wants so i have put a overide on incase,

[cossie604]

Chatter????

[whitecossie]

ya the chatter off ya turbo when ya ant got a dv on ,

[XR4Timan]

You gotta be silly to run a Cossie w/o a dump valve, that's why Ford fit them standard - and Fords are cheap ass bastards!

If you have no dump valve, it will send air to your turbo to stall the blades. Also the trapped boost will try to escape through the easiest exit out, so it can blow your clamps off. Finally, it will slow down the turbo, since it's trying to stall the blades, whereas a dump valve will keep the compressor wheel running at speed, so there will be less delay in speeding back up.

Plus the sound of an atmospheric dump sounds great!! Tells everyone 'F@CK @FF I got a turbo, you slow-ass b!tch!"

[whitecossie]

Plus the sound of an atmospheric dump sounds great!! Tells everyone 'F@CK @FF I got a turbo, you slow-ass b!tch!"

lol like that bit

[cossie604]

Originally Posted by whitecossie

ya the chatter off ya turbo when ya ant got a dv on ,

Nah mate, that aint waste gate 'chatter'...its compressor surge and its generaly considered to be of ill health to your turbo...although many ppl do run their cars like that with out many probs.

[XR4Timan]

Originally Posted by cossie604

Nah mate, that aint waste gate 'chatter'...its compressor surge and its generaly considered to be of ill health to your turbo...although many ppl do run their cars like that with out many probs.

Problems aren't evident until they remove the intake hose to the turbo and discover excess play in the turbine shaft. Then rather blame the lack of a DV, they'll blame it on the turbo

[JamesH]

Originally Posted by XR4Timan

You gotta be silly to run a Cossie w/o a dump valve, that's why Ford fit them standard - and Fords are cheap ass bastards!

If you have no dump valve, it will send air to your turbo to stall the blades. Also the trapped boost will try to escape through the easiest exit out, so it can blow your clamps off. Finally, it will slow down the turbo, since it's trying to stall the blades, whereas a dump valve will keep the compressor wheel running at speed, so there will be less delay in speeding back up.

Plus the sound of an atmospheric dump sounds great!! Tells everyone 'F@CK @FF I got a turbo, you slow-ass b!tch!"

Not really

Ford fitted them as standard, because do you think business men would want their car making chatter noises all the way down the motor way?

Remember they were a rich businessman's car to start with (Sapphs)

However, you are right in principle, but it only applies to turbos T4 and bigger

[JamesH]

Originally Posted by XR4Timan

Problems aren't evident until they remove the intake hose to the turbo and discover excess play in the turbine shaft. Then rather blame the lack of a DV, they'll blame it on the turbo

The two are very simiolar, but surge is far more severe


And I do believe he was originally talking about chatter, as it's only when you remove the dump valve he said

[rabmc]

I run no d/v ang get sommme flutter / chatter or whatever the correct term is for it , and dont think iL be changing , it would have to be one or the other though a bit concerned if its causing damage to my turbo

[gym-rst]

Originally Posted by whitecossie

how many people run them ?

i havent had 1 on my cossie i use to like the chatter but it gets a bit to much sometimes ,ive tried my mates on today and it sounded class but ill proly get sick of that and go back with the chatter,

Thats funny i just done the same thing myself on saturday just fancied hearing it dump again although i do love the sound of the chatter the air filter gives

[whitecossie]

sorry i did mean flutter well anyway that noise that comes out of ya airfilter,

[m_nettleship]

I am getting confused reading this, I have a brand spanking new turbo on mine, with no dv when u let off or change gear, I call it wastgate chatter, or a FLUTTER or somthing, sounded alot louder when I but a come filter on to when I had the air box on.

[XR4Timan]

Put a dump valve on it, to keep your turbo in top-shape then.

[whitecossie]

ive read a few post's on here about flutter etc and it think the phase u must use a dv applies to big boost cars and when ya running big bhp , please correct me if im wrong ,

[JamesH]

Originally Posted by whitecossie

ive read a few post's on here about flutter etc and it think the phase u must use a dv applies to big boost cars and when ya running big bhp , please correct me if im wrong ,

Very true mate. Only T4 turbo's or bigger.


Do you really think that Karl Norris would have mapped Tiff's old car with 32psi spike and 28psi held (on a T34), with no dump valve if it REALLY mattered? (Just an example)

[XR4Timan]

It does matter....obviously it matters more as the flow of air is increased (eg T4). You will see issues with the T4s more sooner then you would T3s (eg bigger blades resting on the same sized shaft). But it still causes an issue with T3s. Otherwise Ford would have not put one on a T3 producing 9 psi.

Obviously you don't have to listen to me at all, and do the f@@k you want mate, but I would rather side with caution methinks.

[K500BHP]

if a t 34 is running 9 psi as standard and you up it to 30 psi then that must be classed as under stress so more prone to failure so the fitting of a dv to reduce stalling of the blades must help ???????????

[rabmc]

The bottom line is i think for 80% of people is...

Dump valves sound gay but love the flutter OR

Dump valves sound great



IMO

[moonstone mike]

cant hear my dump valve over my flutter, chatter what ever you want to call it

[*Bri.4.b.Cos*]

Well chatter gets my vote anytime, if it brakes ill fix it simple as!

Bri

[JamesH]

Originally Posted by XR4Timan

It does matter....obviously it matters more as the flow of air is increased (eg T4). You will see issues with the T4s more sooner then you would T3s (eg bigger blades resting on the same sized shaft). But it still causes an issue with T3s. Otherwise Ford would have not put one on a T3 producing 9 psi.

Obviously you don't have to listen to me at all, and do the f@@k you want mate, but I would rather side with caution methinks.

No need to be like that mate

Yes it matters, but nothing worth worrying about IMO on a T3, just my opinion!!!!

Ford put the re-circ dv on there as the customers at that time probs wouldn't appreciate chatter

[XR4Timan]

The last line I wrote was to be taken in humor, mate! Won't argue over a poxy issue like DVs!!

[JamesH]

OK be like that MATE

[whitecossie]

im sorry didnt mean to cause any bother like was just asking who ran 1 and who didnt ive got 1 on mine now if that makes any difference ,

[rscozzysie]

i,ve got one on mine.i'm running a t4.

[JTECH James]

a mate of mine had a stage 3 car t34, no dv. turbo stalled and the turbine shattered, sending all the pieces into the intercooler and a few found there way into the engine and killed it dead!

Air going the wrong way through a turbine can only be bad and cause damage, they just are not designed for that sort of abuse, if you run no dv the risk s all yours cos i dont want it!!! it may sound nice but so does running no air filter but it obviously isnt good for the turbo or engine.

I always run a dv!!

[darr686]

Hi what type / brand D/V would you guys recomend ?

[JTECH James]

Bailey all the way

[Stealth Bomber]

At the end of the day DVs do sound fucking GAY

[moonstone mike]

Not as gay as buying a new turbo !!!

They only sound gay on crap slow cars....when you see a cosworth on full song with a dump valve the sound dont matter!

[JTECH James]

just fit a re-circulating unit.

[Stealth Bomber]

Originally Posted by moonstone mike

Not as gay as buying a new turbo !!!

Whatever you say!

[img:400:261:aebd073c60]http://www.portalbaw.com.br/velho/vilage.jpg[/img:aebd073c60]

[moonstone mike]

Love the tash on the right