Maxxeh

I finally took my dv off. it drives 1000 times better. I get sum good chatter too. will it chatter with more psi?

NIMRODS_RST

iTrader: (6)

you have seen the light at last!!

rst230bhp

iTrader: (1)

yes mate im running 17psi with a cone filter

the chatter is quite loud

the car seens to run a lot better as well

turboben

dump valves belong to the corsa boys and all that jap crap scene

Oranoco

Another RST owner that has seen the light and realised dump valves are rubbish on them

gaz s1

amen to that

Karlos G

iTrader: (4)

I'm hearing a lot of people say that they run better without dump valves, but what about all that pressure building up back to the turbo then?
I'm running about 16psi and would like to see how she runs without the D/V but dont want to batter my turbo!

vroooom ptssssh

Karlos G, unless you've got a T4 sized turbo running loads of boost i.e. 25ish+psi, I wouldnt worry about 16psi

SafeChav

Cue the Pro DV Brigade

davidnormanuk

Why do cosworths run a DV from standard then even though they are running standard boost. To me it makes sense to use one wether its a recirculating one so you don't get the noise or a normal one.

rstubby

i have a dumpvalve on mine (plz dont hurt me) and am going to be fitting a front mount intercooler and stg 2 hybrid turbo, what difference will i notice without a dumpvalve compared to with a dump valve???? this is a serious question plz no silly answers lol

davidnormanuk

You won't notice any difference but in my opinion your turbo will last longer as you are avoiding turbo stall (chatter) therefore taking some of the strain off the internal components of the turbo which can only be a good thing.

TuRbO-CaB-LaD

will mine chatter if i take the dumpvalve off im on mfi 214bhp@16psi, i heard it only works on efi this true?

davidnormanuk

When I first did the rst conversion on my cabbie mine used to chatter like mad with MFi with the boost only set at 10psi. It seems to vary from car to car. With MFi the flap on the metering head closes as soon as you take your foot off the throttle so chatter can't be heard. Chatter is turbo stall which can't be good for a turbo long term (in my opinion anyway).

SafeChav

because they use MAF sensors, and without the dump valve, the charge travels back down the wrong way causing it to come off the throttle very abruptly.

The MAF sensor senses air flow, but not in which direction it flows. Same story with all forced induction cars with MAF sensors

davidnormanuk

Cool didn't know that. You seem to know alot about all the different systems out there.

SafeChav

Don't be fooled by what i write, there are far more knowledgable people than me!

I tend to ask a lot of questions and remember a lot

davidnormanuk

Best way. Its just finding the right people who have the time to answer.

SafeChav

I know that feeling, when i ask a question its quite rare to get a constructive answer.

But then i dont ask many questions on here, when i do they are usually fairly involved

davidnormanuk

I'll remember in future then if I need to know what goes where and why to ask you on here.

Oranoco

david mate I have told you what Safechav has everytime the dumpvalve debate comes up and now you start listening when somebody else tells you for the X'th time

Incidentally it's only the small turbo Escort Cosworth that runs the MAF.

davidnormanuk

I didn't know then the sierra ran a dump valve/recirculation valve as standard as I am only just learning about them. Obviously they put it on there for a reason but I didn't know why. May aswell learn something while I'm on here. Surely avoiding turbo stall can only be a good thing.

SafeChav

Sorry mate did you say something

Ill ask David






















And btw i knew that about the small turbo Escos's HONEST

Oranoco

You're such a

SafeChav

Damn shame ive run out of space in my siggy box

Oranoco

vroooom ptssssh

Only the T25 Escort cosworth using fords EEC-IV management system has a MAF sensor, no other cosworth does...hence why it will run with no boost hoses connected.


**edit**

Urgh, Oranoco beat me to it

SafeChav

I've already been corrected on that

Do the large turbo Escos's have the re-circulating DV?

vroooom ptssssh

Yea they sure do.

SafeChav

Ah fair do's then.

Are the rest MAP sensors presumably then (i know little about cossies as i said to you before )

vroooom ptssssh

Yes cossies do run map sensors. all siera/sapph cossies std run a 2bar map sensor, large turbo escos runs a 2.5bar map sensor std

SafeChav

stupid question there by me i actually already knew that

Alex_86

iTrader: (2)

DV heard that it will:
release the pressure. the chatter sound is the turbo breaking up...

vroooom ptssssh

Alex_86, You started off well in English..then it went to pot and you lost every single one of us

Alex_86

iTrader: (2)

hehe, will translate it later today mate.. was on work so it was easier to wright in norwagian

SafeChav

Thats rich coming from you scotty boy

Hes as english as you are

rs shawn

Never been proven on an RST that a D/V will help a turbo last longer. None of the race cars used d/v's..altho they did get meticulously maintained and serviced/ stripped down often.

There's a thread on this just about every week and I'm pretty sure it's widely perceived that unless you are running big power and big boost then you do not need a d/v fitted and will still have a mechanically-sound turbo with no problems.

I used to have one on my S2 and it ran with no problems at all. I removed it when I sold it..and again it ran exactly the same with no problems.
My S1 runs without one and has slightly more power and chatters a bit top end of boost. The S2 never. Both ran same MFI. some cars do, some don't.

SafeChav Remove the sig smiles and get the quotes onto one line each and you will have some more room for your personal abuse, ya tosser

rs shawn

Here's how it could look....


Everyone loves me on here

not feeling loved here

rog

iTrader: (2)

Took mine off the cossie and it lasted 2 days before the turbo shat itself, was only a T3 and stage 3 chip, not sure if it was just coincidence or not. I'd still do it again tho.

SafeChav

Everyone loves me on here

not feeling loved here

But without the smilies i just look like im hated

Plus the top 2 were only joking, s2 300bhp was just a prick lol (ive moved oranoco's to the jokey section )