do i need to be running a dump valve the car is running 18 psi at about 240 bhp

 

No, in a nutshell. Unless you are running in excess of 30psi or using a T4 turbo (or some fancy GT series jobbie).

I don't run one on my own 260bhp car running 24psi and have no intention of fitting one

 

Pretty much all oe cars(turbo) have them as std WHY.
It prevents turbo stall, allowing faster spool up, and sounds awsome IMO, not to everyones taste though.
tabetha

 

no dont do it throw you dump valve away

all the o.a.ps at the bus stops will be sticking there arms out thinking your driving a bus

they sound terrible

cant beat the sound of turbo chatter

 

You'll find VW/Audi cars have them listed as a noise surpression devices. It has fuck all to do with preventing stall and everything to do with people buying road cars not really wanting their car sounding liek a flock of pigeons everytime the throttle is closed.

In all my years playing with turbo cars I have never once seen a failure as a result of not having a dump valve fitted. Escort RST and Fiesta RST don't have them as standard either.

Make no mistake, on an RST you are buying nothing more than a noise

 

have to agree best move i made taking my dump valve off,dont get me wrong im not a dump valve hater,actually quite liked having mine on,but my car ran better,idled better,came on boost harder and felt so much nicer to drive,no more jerkiness cruising at 30 when i removed mine,so it got binned

if you just want it for the noise fair enough i was 18 once myself for performance wise on an rst its just a gimmick

 

m8 im running 240bhp @18psi ive got a dv and im taking it off as ive heard my car will run better and prob sound better with a nice chatter

 

240 @ 18 psi

hmmmmmm, im scepticle to say the least lol

 

I'm running 24psi to achieve 260bhp

 

escort rs turbos wont chatter if you still running the metering head ( i think anyway )

 

I get a small amount but nothing like you get on an EFi as teh metering head muffles it all. Best of both worlds imho, you don't sound like a buss or a flock of pigeons

 

why you scepticle?
mines makes 214@wheels which is around 240-250 flywheel and i only run 18 psi,still scepticle now?
not everyone is boost junkies that need mega boost to get over 200bhp

 

oh i understand totally that you dont have to run ridiculouse boost,

is yours still mfi? what head work have you had done? and what turbo,

the project i share with my uncle, were running a t34, with a stage three head with enlarged valves ect, portmatch manifolds and all that, unfortuanatly still on mfi, and that made 232 @1.4 bar, so a little it higher

 

still on mfi yes, stage 3 t3 turbo and AVA spec big valve head/custom newman cam,no fifth injector but using 2 std rst fuel pumps

 

have to agree with oranoco there as it is obvious that all maunufacturers that fit these for is just for the sake of it.
I cant imagine that a turbo spinning at up to 200,000 rpm and suddenly havings it's exit cut off would be a problem, and would in now ay impede the turbine from spinning.
Of course it could be that esc uses smaller components and less boost so is not needed as std ?
I think ford fitted them just for something else to go wrong so they could pay out money for repairs as they are now a registered charity ?
tabetha

 

You complete tool

It's widely known that you don't need them on these cars (not commenting on other marques although as stated VAG list it as a noise surpression device). In fact the only reason the small turbo Escort Cossie needs one is because the MAF can't distinguish which direction the air is travelling across it and gets upset.