fiestaturbo.com

[Miss Fiesta Turbo]

Why do dump valves push up the insurance premium so much?!?!

[Raymondo]

Just get rid of it. Get a cone filter and hear the chatter. Much nicer noise IMO

[Miss Fiesta Turbo]

I'm waitin 4 poxy diamond to ring me back now... idiots!

They r bein funny cause its got a dump valve... and it didnt have one wen i got the first quote... but they cant jus charge me more... they gotta check with the manager!

[filtra]

It attracts attention that wouldn't otherwise be there, just as aloys or bodykits do.

[Oranoco]

Made no difference when I had one. It doesn't increase power so they made a note on the file and that was that. As Raymondo said though chuck it in the bin as it does bugger all and then the problem is solved

[diablosvy]

Made no difference when I had one. It doesn't increase power so they made a note on the file and that was that. As Raymondo said though chuck it in the bin as it does bugger all and then the problem is solved

Thats not true...they prevent compressor stall and the shaft snapping, so they are a good idea, ask the insurance company if it makes a difference if its a recirc as it will be alot quieter and wont attract as near as much attention

[Oranoco]

Made no difference when I had one. It doesn't increase power so they made a note on the file and that was that. As Raymondo said though chuck it in the bin as it does bugger all and then the problem is solved

Thats not true...they prevent compressor stall and the shaft snapping, so they are a good idea, ask the insurance company if it makes a difference if its a recirc as it will be alot quieter and wont attract as near as much attention

On an RST is does no such think. That's nothing more than marketing bull to get people to part with cash. Speak to any tuner worth their salt and they will tell you that you do not require one on RS Turbo's or Cossies until you are running 30psi of boost or you are using a turbo of T4 in size or greater.

I run 25psi through my T3 on my Escort and haven't ever had even the faintest whiff of trouble. Look how many of the top RS Turbo's run them, not many.

In some situation the dumpvalve can cause overspeeding of the turbo which is more damaging than the stall.

[diablosvy]

Made no difference when I had one. It doesn't increase power so they made a note on the file and that was that. As Raymondo said though chuck it in the bin as it does bugger all and then the problem is solved

Thats not true...they prevent compressor stall and the shaft snapping, so they are a good idea, ask the insurance company if it makes a difference if its a recirc as it will be alot quieter and wont attract as near as much attention

On an RST is does no such think. That's nothing more than marketing bull to get people to part with cash. Speak to any tuner worth their salt and they will tell you that you do not require one on RS Turbo's or Cossies until you are running 30psi of boost or you are using a turbo of T4 in size or greater.

I run 25psi through my T3 on my Escort and haven't ever had even the faintest whiff of trouble. Look how many of the top RS Turbo's run them, not many.

In some situation the dumpvalve can cause overspeeding of the turbo which is more damaging than the stall.

Youv just contradicted yourself there mate, its not marketing bull as its proven to prevent compressor stall, and you just said it may not be needed until higher boost but it is still needed non-the-less

[Oranoco]

Perhaps I should have worded myself a little better the compressor stall that you are talking about is not damaging until 30+psi of boost is used or a turbo of T4 or greater is used. This is not hype or pub bull this is fact and is accepted widely throughout the Ford Tuning industry.

The only Ford cars that warrant a DV are the Focus RS due to the type of turbo being used. The small turbo Escort Cossie due to the way the Engine management works as it can't work out which way the air is being passed over the Air Flow sensor which causes hiccups. And the RS500 Cosworth as it has a T4 turbo.

See how many of the quick RST's use one, does that not tell you anything? Tim Butcher, Christian Major, Ollie Meredith, Alex Night, Tony Saunders. All monster RST's and not a dumper in sight.

I have been there done it and got the T-shirt with the dump valve thing.

FACT on an RST you do NOT need a DV. If you want to fit one then go ahead (each to their own ) but don't do it because of the myth that you are saving the turbo.

[diablosvy]

I agree that they may not be needed until higher boost, but that doesnt detract from the fact that they do save the turbo whether that be =>30psi, and having never dabbled with turbo's i wouldnt need one, I only know a little of the theory.

[Oranoco]

Don't mean to be rude mate but I have more than dabbled with forced induction over the last 12 years or so and I promise you theory means very little without experience.

[Miss Fiesta Turbo]

i've only got mine on there caues it sounds gorgeous!!

[diablosvy]

DOnt worry, i just teach myself this kinda stuff in my free time so of course im gona have gaps in my knowledge, and yea im sure one day i'll be put the theory into practice

[Oranoco]

i've only got mine on there caues it sounds gorgeous!!

The reason a lot of people fit them. That was the reason I fitted one and the same reason my brother fitted one.

[si 16valver]

oranoco you know way too much

[XR_Craig]

Got to agree with oranoco, the only reason people fit them is for the noise really.

I took my off as the novelty wears off after about a week.

Plus it used to sometimes stick open and annoy me.

[filtra]

Youv just contradicted yourself there mate, its not marketing bull as its proven to prevent compressor stall, and you just said it may not be needed until higher boost but it is still needed non-the-less

It also means you have to re-fil the charge air creating a brief pressure difference which means on gear change the pickup is fractionally slower. So it decreases performance if anything. Compressor stall wont hurt a T2 on 7psi, Ford would have installed one if it did. Theres lots of high milage frsts on the orginal turbo that have no problems. Just depends how you treat your car i.e. letting it warm up and down pre and post hammering.

In relation to the insurance companies, some may or may not increase the premium. However there is a just reason for increasing it. People hear the pssh noise (providing we are talking atmospheric dv) and so automatically makes your car more 'loud' and therefore nickable.

[diablosvy]

Youv just contradicted yourself there mate, its not marketing bull as its proven to prevent compressor stall, and you just said it may not be needed until higher boost but it is still needed non-the-less

It also means you have to re-fil the charge air creating a brief pressure difference which means on gear change the pickup is fractionally slower. So it decreases performance if anything. Compressor stall wont hurt a T2 on 7psi, Ford would have installed one if it did. Theres lots of high milage frsts on the orginal turbo that have no problems. Just depends how you treat your car i.e. letting it warm up and down pre and post hammering.

But doesnt a DV allow the turbo to keep spinning very fast so it doesn't need to spool up again i.e. DV opens the airway so that the pressure from the turbo to the inlet manifold can be released, without this the turbo lag would be dire???

[filtra]

Yes it does keep the turbo spinning but as your running not much more than a wet fart compared to highboost/big turbo apps as Oranoco has desribed.

You have to remeber the T2 spools at just over 2k rpm that you are on boost most of the time unless your in granny mode.

Now this is where im not to sure. In regards to re-circulating and atmospheric DV. I remember seeing a thread about it but I can't find it!

Anyway i might be wrong in this so dont quote me. The atmospheric valves remove air from the system infront of it i.e. up the charge carier and so it needs to re-charge that part of the system. So if you did have a recirc d/v it would be pointless as your not suffering from serious turbo stall and your not getting the noise.

Could someone confirm/correct that?

Cheers

[XR_Craig]

A dump valve isn't really going to stop lag, if it did then it would be a perfect cheap replacement for anti-lag

[filtra]

A dump valve isn't really going to stop lag, if it did then it would be a perfect cheap replacement for anti-lag

Agreed, all they do either recirc or atmospheric is prevent backpressure?