dump valves
23-12-2005, 09:35 PM
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dump valves
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,
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,
23-12-2005, 10:23 PM
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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 
24-12-2005, 04:18 PM
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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
24-12-2005, 04:50 PM
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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,
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25-12-2005, 09:27 PM
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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!"
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!"
25-12-2005, 11:38 PM
#12
Originally Posted by whitecossie
ya the chatter off ya turbo when ya ant got a dv on ,
26-12-2005, 10:21 AM
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Originally Posted by cossie604
Originally Posted by whitecossie
ya the chatter off ya turbo when ya ant got a dv on ,
26-12-2005, 10:39 AM
#14
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!"
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
26-12-2005, 10:41 AM
#15
Originally Posted by XR4Timan
Originally Posted by cossie604
Originally Posted by whitecossie
ya the chatter off ya turbo when ya ant got a dv on ,
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
26-12-2005, 11:44 AM
#16
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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 
though a bit concerned if its causing damage to my turbo
26-12-2005, 03:36 PM
#17
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Re: dump valves
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,
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,
27-12-2005, 01:47 PM
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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.
27-12-2005, 09:39 PM
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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 ,
27-12-2005, 09:55 PM
#22
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 ,
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)
27-12-2005, 10:14 PM
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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.
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.
27-12-2005, 10:51 PM
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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 ???????????
29-12-2005, 08:40 PM
#28
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.
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.
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
30-12-2005, 09:33 PM
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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 , 
03-01-2006, 04:07 PM
#33
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!!
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!!
05-01-2006, 11:10 AM
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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!
They only sound gay on crap slow cars....when you see a cosworth on full song with a dump valve the sound dont matter!
05-01-2006, 01:04 PM
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Originally Posted by moonstone mike
Not as gay as buying a new turbo !!!
[img:400:261:aebd073c60]http://www.portalbaw.com.br/velho/vilage.jpg[/img:aebd073c60]
