S2_Steve

Ive already got a dump valve but i want a second one!
My one i have got at the moment is on the charge carrier and the samcos ive got have got the piece for the dump valve on it but just with a black piece in it.
If i cut into my dump valve piping that comes out of the top of it and put a T-piece in will i be able to use the pair of them?
what will this do will I gain or lose anything out of doing this?
or will it just remain the same.

cossiecrew

cant answer your question matey but prepare for a slating off the chatter boys

mattbibs

why?

one is good enough!!

Oranoco

Get rid of the 1st one mate. The way the fuel injection system works on these cars mean they don't like dump valves. You can suffer with idling and stalling problems with one fitted. Best thing I did was to lose mine. I now use it as a paper weight at work

S2_Steve

Surely if im realising the air pressure between gears quicker with 2 dump valves i will the for boost alot quick in the next gear.
Wont I

Oranoco

In a nut shell mate, No. If you change gear quickly the DV doesn't even have time to react. Take it off and file it away in your garage somewhere. Unless you are running daft boost there is no need for you to have one. If you lose all the pressure in the system potentially you will have to wait longer for it to boost up as the pipes and intercooler will all need to be filled with air and that air will have to be compressed to the required level before the car will come on boost again

mattbibs

you will come on boost a lot quicker in the next gear if there is no DV and loss of pressure to atmosphere. take yours off and give it a try!

ECU Monitor Enthusiast

iTrader: (1)

TAKE YOUR DUMP VALVE OFF AT YOUR OWN RISK

I just killed my turbo by taking the dump valve off after listening to such advice !!!!!

Happened between gear changes. !!!

It bent the shaft and it was a roller bearing turbo too.

Getting a bigger turbo now !!!

Graceland

2 dumpvalves?
one at the most

S2_Steve

I cant take my off yet as its on the chare carrier and i have nt got one that hasnt been adapted to fit a dump valve on it.

thanks for you help
still learning only had the car 2months

Oranoco

Simon as far as RST's go thats complete bollocks

We're talking RST's here, they left Ford without a DV. The Escort Cossie actually left Ford with one fitted. Not having one on an RST is of no consequence whatsoever.

mattbibs

what turbo did you have tho secs?

im guessing his S2 has a standard T3 on and not enough boost to bring it into danger!

Oranoco

How large and/or what boost pressure was being run. Are the turbo people just using that as a cop out to get out of sorting it?

ECU Monitor Enthusiast

iTrader: (1)

Oranoco,
Didnt realise it was an RST.
But the standard cars only ran tiny boost so didnt need them.

It is just my advice and opinion from my experiences !

Oranoco

Fair enough

ECU Monitor Enthusiast

iTrader: (1)

It ran an copy of a Turbo Dynamics MD240

(2 bar of boost by 3500 rpm)

Obviously needed a dumper at that boost pressure but a WELL KNOWN
tuner said to me "take it off, you dont need it".

A week later it was dead.

GT30 here we come

Oranoco

2 bar is 29psi mate and that's at the level where I am lead to understand that a DV is required.

mattbibs

agreed - that is some serious boost. opinions vary as when one is needed but IMO safety comes first when you using that level of boost!

DannyC

dump valves are gay imo :gayflag:
i agree totally with Oranoco on this, i noticed a improvment after taking mine off and know other peeps who have aswell.

dump valves are all just about 'hey everyone look at ME'

big_wig_074

i ran a t34 at 34 psi no probs without a dv on me cossie,and wont be using one on my 1.8 zvh motor either(circa 20 psi i reckon)no need(in my experience)

ECU Monitor Enthusiast

iTrader: (1)

I guess this is one of those debates that everybody will have a different opinion.

After my experience I certainly will fit one but I hate them !!!!

ImaRacing 700

How can you hate a dump valve Simon? Just put a recirculating one back in if you dont like the noise!

Spiky

iTrader: (1)

i wont be as i dont have one, but i will do i expect, when i can be bothered to buy one

Anonymous

You will get no benefits at all from a second dump valve.

You may get some benefits from removing yours though, or better still put a resitrictor in the pipe that T's off for it so that although it works it only leaks a small amount of pressure, taht way the intercooler wont totally depressurise but it will still help protect the blades.

You are aware are you that if you remove all the resistance to the turbo by excessively large dump valves, that it can allow the turbo to overspin and go to fast which can lead to damage?

big_wig_074

ive got one if you want matey?silver bailey jobby.25 quid posted!

adamS2RST

Iv'e heard a car with two

JamesH

iTrader: (21)

Yours was a T4 though? And most people say don't nned one unless you're running a T4!

Stavros

SECSs wasnt a T4, was some rollerbearing job, and on a BB cored turbo id use one as so far experience shows they weak as fuck.

JamesH

iTrader: (21)

My mistake then, thought he had a T4!

R4N SS

iTrader: (6)

oh shit - look at my thread

i give my turbo a week

morto

oranoco, what a lot of shitt you talk mate s2 dont have a problem with dumpvalves as long as its electronic like mine , iv had it on for years with no probs at all, the electronic box sorts the tick out maty ask STU he makes them and quality!!

andzz

sufsRS

its nt bullshit at all i usd 2 fink ump valves were gud for ur s2 but when i took mine off it ran so smooth it dles alot smoother and gear changes were smoother evn picked up faster, im talkin frm experience trust me take it off youll neva look back,

Stavros

Dumpvalves are a waste of time in most cases.

And 2 DVs are likely to give you LESS noise than 1, as the pressure is shared then.

Ive tried it too When i had my first reno5 i had a DV (1998, they were COOL then, not 2005 ) and then we fitted 2, made no difference, maybe slightly quieter, so for a laugh we put another one on we had lying around, that deffo made it quieter than 1.

Id never fit one unless needed, as chatters far better.

I cant decide wether to risk running without them on my GTR as its gonna be running silly boost
My main thing about running them isnt that i dont like the noise, im worried theyl be rising slightly from their seat at full boost, ie leaking slightly, i think its FAR more common than you think, and will overspeed the turbo like fuck and lose you power even if its same boost.

Oranoco

Ok, I'm chatting shit because you have to add a box of electronic tricks to make a dump valve work properly on an Escort RS Turbo