PETEDUDE007

could someone please tell me more about the wastegate i understand what a dump valve is does etc and how it fits but the wastegate is it basically the same thing or..........

which one should i purchase for a near standard s2 and how much are they whats required to fit etc?

Rogeyboy

iTrader: (2)

Well if your car is near standard i would guess it running a garrett t3 turbo and standard elbow...? If so it has an internal wastegate inside the exhaust elbow!

The wastegate is the flap in the elbow that controls how much boost the turbo makes, essentially allowing some exhaust gases to bypass the turbo to reduce how hard it works and how much boost it makes. The actuator controls the wastegate and sets how much boost the turbo makes.
Whereas a dumpvalve releases boost from the inlet side of the engine/turbo when the throttle butterfly closes so the pressurised air in the inlet doesnt back up and cause the turbo to "stall" (a theory which provokes alot of arguement on its own!).

External wastegates i don't know much about, so i'll let someone who knows fill you/us in on how they work!

PETEDUDE007

ok cool well thats a start! lol novice here u see and ive heard bad shit about dv's which my car has and is running totally fine with however i dont thi i could give up on the noise its a novelty just now so think ill seeif i can get an external wastegate once i learn more!

essexRSTSouthend

External wastegate are used when running loads of boost.in a way releases the gasses quicker,putting less strain on the turbo.dump valves are bad if your running the wrong type,single or twin piston etc.if your rs running fine,then your ok.they are designed to make your turbo last longer and quicker boost up time.without one,the boost that dont get used goes back to the turbo,hitting the turbine,slowing or even stoping the turbo spinning.so its always worth having one.they normally used for 14psi above.hope that helps.

essexRSTSouthend

External wastegate are used when running loads of boost.in a way realeses the gasses quicker,putting less strain on the turbo.dump valves are bad if your running the wrong type,single or twin piston etc.if your rs running fine,then your ok.they are designed to make your turbo last longer and quicker boost up time.without one,the boost that dont get used goes back to the turbo,hitting the turbine,slowing or even stoping the turbo spinning.so its always worth having one.they normally used for 14psi above.hope that helps.

PETEDUDE007

oh well ill maybe keep my dv then its a baileys one so i presume its ok and the car runs as smooth as feck thanks to a new friggin fuel pump relay!