fiestaturbo.com

[festaturbo]

Any one have any idea on how to fit a recirculating dump valve to a FRST

[kirk sear]

u cant fit them to a frst there for cosworths and if u look closely there is no gaps because they dont give of the tisssshh when u change gear.a cosworth have these fitted standard and upgrade them to bailey when they up the boost.

[Ian C70T5]

You can fit them AFAIK..

They make the car have the fluttering through the filter instead

[Fezzy Turbo]

u cant fit them to a frst there for cosworths and if u look closely there is no gaps because they dont give of the tisssshh when u change gear.a cosworth have these fitted standard and upgrade them to bailey when they up the boost.

Kirk......i think you got it wrong. Why is using a Bailey d/v an upgrade ?? bailey are not the d/v to use on a cossie or any car for that matter.

As Ian has said, you can fit a re-circulating d/v. It will be a bit awkward but it will work.

[festaturbo]

Fezzy why not a baileys? Wot dump valve would u recomend?

[Fezzy Turbo]

The problem with Bailey and traditional piston d/v's is that they stay open until enough pressure has been made for it to close and will let all sorts of crap into your engine...........not good.

Get a twin piston d/v......i think Forge do one and i can highly recommend the Collins twin piston d/v..... i have one They have a second valve which will remain closed and stop any nasty stuff entering the engine.

cheers

[kirk sear]

what i meant by an upgrade is that the cossie as a dumpvale as standard but when they turn the boost up they have to up grade there dump valve to a bailey cos they have a better spring.

[Fezzy Turbo]

you can just put a stronger spring in the re-circulating d/v

As i said, Bailey are not the type of d/v i would fit on a cossie, something like a "group A" type or twin piston would be better, as both have parts to stop any crap entering the engine.

cheers

[festaturbo]

Letting crap through where the vacum hose or the turbo hoses?
I have a piston dump valve. The large piston has 2 rubber seal rings and it seals the vacum side. Theres a smaller plastic piston which is held down by a little spring sealing the turbo pipe? Is this a twin piston type?

[Fezzy Turbo]

sounds like it, do you know who made it ?

or can you get a pic of it ?

[PhilM]

You can fit them AFAIK..

They make the car have the fluttering through the filter instead

Yep...indeed you can it them.

Ian, with a recirc DV they are 100% silent. No flutter. Flutter is caused when there is NO dumpvalve at all, as the air comes back through the turbos impeller blades. A recirc will prevent this happening, as will a normal DV, the only difference is one is quiet, the other is not .

[MadcatCraig]

with a recirc dump fale the pressure normally let out of the holes creating the noise is sent back to a charge hose the otherside of the turbo ! so in a fiestas case would have to be the air filter hose !

woudl mean cutting one iup mind !

[kirk sear]

so i was right then i think.like i said they are mainley for cossies as they are standard on them and then they put the bailey 1 on as it is an uprated 1 plus looks better than black.

[crispa]

Come on peeps!!

Right Baileys do make a twin piston d/v which prevents s**t idle and c**p being sucked in, and you can fit a re-c d/v to nearly all turbo cars the difference is that a stardard d/v dumps to atmos as you all know making a lot of noise a re-c dumps back after th filter before the turbo, the avantage of this is mainly less noise + for cars with the maf sensor after the airfilter befor turbo it stops the ecu over fueling cause when a stardard d/v dumps the ecu still thinks the air is in the intake eg 10 cubic litres of air pass the maf but once dumped only 2 cubic litres remain. If you have a manifold bar sensor + another sensor which name i have forgoted this prolem does not occure so a atmos d/v is fine!!

The other option is a dumpvalve that dumps into the exhaust manifold causeing engine bypass which makes the turbo spin faster. This option is very very complcated because the engine fueling and spark need to be retarded so the spark occures as the exhuast valve opens and is known as anti lag!