hi does any one know what is the best type of dump valve to use on a wrx impreza recirculating or atmosferric thanks neil5536

 

The recirculating one that Subaru fitted is best.

Simon

 

did they fit one as standard then

 

the standard one is a recirculating one. i.e you cant hear a woosh sound. if you want to hear a woosh sound which is atmospheric,fit a bailey evo twin piston one.

 

They certainly did.

 

So the best after market one would be the Baileys then?

 

yes i have a hks dump valve fitted but was told the recirculating type was best is this true

 

Not again; dont fit VTA dump valves to your car; theyre ****e and the only benefit is in McDonalds carpark. A VTA dump valve causes overfueling which washes the bores on your car. Its as bad as driving round with the choke half on.

Simon

 

It is true Neil, yes.

In answer to your question below; VTA stands for Vent To Atmosphere.

Simon

 

whats a vta dump valve

 

so you rekon i should convert back to a recirc type then

 

i fitted an induction kit to my scooby today and i can say that the noise that you get from the wastegate through it while retaining the standard dump valve is far better than vta

 

recirculating = no noise. vta = noise. no power gains just noise. the vta can cause rough running and the fueling can change. i personaly like the vta because it gives popping and banging which sounds good. my maf sensor and 02 sensor are new and my fueling was fine on rolling road with decat exhaust and ind kit. each to there own

 

How long 'til the MAF's boogered

 

youl know when the car starts to cut out.then get it on the diagnostic machine with a scooby mechanic

 

it was hesitating before i put the induction kit on it. put it on and it seems to have gone.

got it booked in at xtreme scoobies on 7th may for an interim service and check over. are new maf's expensive?

 

same thing happened to my car. £230

 

 

The fastest ones are definately VTA's.......