Recycling dump valve

[Jhurrell]

Hi
Does any one know or has used a recycling dump valve, I would like to try fitting a dump valve but don't like the idea of the whoosh noise. Any ideas

[herman1rg]

Re: Recycling dump valve

My idea, don't bother.

Get a stainless steel air filter instead has same effect and no oil in the engine bay.

[Jhurrell]

Re: Recycling dump valve

Thanks for reply
I have read so many different looks on dv, I know it would have to be sized to 10mm or less, are they really not worth fitting, I get a pigeon type noise when taking foot of gas, any ideas, all help is is great

Thanks guys

[MrPoo]

Re: Recycling dump valve

Hi
Does any one know or has used a recycling dump valve, I would like to try fitting a dump valve but don't like the idea of the whoosh noise. Any ideas

That's pretty much the only point of fitting a DV to smart, it doesn't do anything else!

[Evilution]

Re: Recycling dump valve

it doesn't do anything else!

Apart from venting the boost air from between the turbo and the throttle body so there is no back charge of pressure that causes the compressor to stall.

Oh, and so the pressure can plateau but still allow the compressor to spin as it was before which decreases the time it takes to re-pressurise the system and spin the turbo up.

...and remove the judder from the spindle that can damage the oil seals.

...and remove the "wastegate noise" which is actually the turbo stalling.

So yeah, DV's do nothing apart from make a noise

Definitely only consider a restricted DV though as a DV designed for other cars can make the effects worse. Plus the restricted DVs are much quieter.

[problemchild1976]

Re: Recycling dump valve

That's pretty much the only point of fitting a DV to smart, it doesn't do anything else!

yeah - all the WRC teams fit them because they love the noise on the special stages

JJ

[lalli_d1]

Re: Recycling dump valve

yeah - all the WRC teams fit them because they love the noise on the special stages

JJ

i thought it was summert diffrent in the turbo that made the whisteling noise

[Jhurrell]

Re: Recycling dump valve

Many thanks for your help guys , the dv idea is in the bin thanks to your advise, any ideas on the pigeon noise I get , like a coo coo when I changing gear,

[problemchild1976]

Re: Recycling dump valve

i thought it was summert diffrent in the turbo that made the whisteling noise

turbos whistle

the blow off valve/dump valve makes the "chatter chatter chatter" on down change

JJ

[MrPoo]

Re: Recycling dump valve

Apart from venting the boost air from between the turbo and the throttle body so there is no back charge of pressure that causes the compressor to stall.

Oh, and so the pressure can plateau but still allow the compressor to spin as it was before which decreases the time it takes to re-pressurise the system and spin the turbo up.

...and remove the judder from the spindle that can damage the oil seals.

...and remove the "wastegate noise" which is actually the turbo stalling.

So yeah, DV's do nothing apart from make a noise

Definitely only consider a restricted DV though as a DV designed for other cars can make the effects worse. Plus the restricted DVs are much quieter.

EDIT: I completely misread Evil's guide, therefore I am an idiot.

[problemchild1976]

Re: Recycling dump valve

did you read the bit about standard DV's or just the first 2 lines or the bit about smart specific DV's??

http://www.evilution.co.uk/511

JJ

[MrPoo]

Re: Recycling dump valve

Has that changed?? I'm sure it used to say that they were a complete waste of time

[problemchild1976]

Re: Recycling dump valve

no - but you have to read all of this....

http://www.evilution.co.uk/index.php?id=250

which then links to the smart specific DV one

JJ

[MrPoo]

Re: Recycling dump valve

no - but you have to read all of this....

http://www.evilution.co.uk/index.php?id=250

which then links to the smart specific DV one

JJ

I'm sure I read something before that said DVs were an entirely pointless mod. Oh well, might have to get round to fitting mine! Am pretty sure if chucked the E-clip last time so have got a spare to hand!

[problemchild1976]

Re: Recycling dump valve

TBH - even just having the noise is worth it!! i loved it.....

on the forfour BRAB though, just a stainless induction kit gives me an awesome "wooooooosh" as i accelerate and a fab "chattttttter" at throttle off

JJ