Fitted a dump valve to my saph earlier on and get chatter and woosh from the dump valve ? Thought i read somewhere that you cant get both ??

 

you can if your dv has a strong spring, it will stay closed at low boost and chatter...

 

..i want chatter!!!

 

Ah right,so for more tish do i fit an airbox ?

 

aint ichatter bad for your turbo? sure i heard that somewhere

 

me too..ideally i want chatter but not if its gona fook my turbo,hopefuly the rs gurus should let us know soon

 

We get dump and chatter on our FRST

 

Trouble is people confuse 'chatter' as found on external waste gates with compressor surge or stall as found in this case. You'll get both if the dump valve either cant keep up with the amount of boost thats trying to escape thru it or as said previously, if the spring is quite hard. In theory, compressor stalling is very bad and on high boost cars it can shatter an impellor shaft...altho no doubt many people on here will now say they've done it since their old man first started working down the pit and it aint blown yet blah blah lol

 

for more tish,fit a dv with a weaker spring, that opens to vent the boost as soon as you lift off....

a stronger spring will keep the dv closed for a bit when you lift off, and you get chatter as the air comes back through the air filter

 

The GGR type DV's give both

Only fooks it on a huge turbo, not T34 size AFAIAA

 

imo chatter is bad....sending compressed air the wrong way through your turbo compressor cant be a good thing ...

 

Sounds ace though dunnit

 

which dumpy would you recomend for more chatter along with the tish?

 

In theory no but surely it depends on application really?

Do Stu/Karl recommend a DV on a T34 Cossie?

 

As above

 

i run the twin piston bailey one, and have plenty of both..infact it sounds fooking hardcore

the single piston ones just tish....

 

TEV has both on a GGR DV, good units but a strong spring and decent strong diaphragm will cause this. A week spring and soft diaphragm will dump easier but ultimately more likely to leak.

 

thats why i like the bailey piston type...no diaphragms

 

I have a GGR item for sale £100

 

Not sen one myself, what inside one of hese then, 2x pistons but how is it layed out inside, cheers

 

My mates Evo 6 chatters and dumps on the HKS SSVQ. Its got different load springs though to get different characteristics.

 

i have a collins twin piston DV on a zetec turbo and it has some chatter, sounds pretty good.

 

i run a t34/35 and no dump valve and though i agree with the above that in theory sending air in the oppisite direction it was designed to go stu @ msd reliably informed me that on the above said turbo no harm will come to it.

 

I run no dumpvalve, Took it off... Sounds awesome on chatter... Fuck the turbo life, Live for the moment

Quick video..

http://www.youtube.com/watch?v=rW2FvwYfqKA