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there only rly needed on car with big powerfull turbo on things like evos where u gonna want ur turbo to last longer and u may not alway use the amount of pressure the turbo builds up driving normally putting them on tiny little turbo on 2l car or less kinda thing just gives u a performance decrease id rather not have a bhp decrease than a nice sound
 

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eh? all petrol turbo cars have DV's in some way or another :-k The evo's have a bosch re-circ job on them which is powerful but its not totally efficient.

the ONLY reason DV's are on petrol cars are due to the throttle body's butterfly valve which creates a massive pressure build up between that and the turbo impeller, putting stress on the shaft and stalling it, meaning a sluggish pick up. They're needed on all petrol turbo cars, but not needed on a derv due to there not being a butterfly valve and the engine injesting all the air created by them before its got time to build up.

Steve
 

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Steve220 said:
eh? all petrol turbo cars have DV's in some way or another :-k The evo's have a bosch re-circ job on them which is powerful but its not totally efficient.

the ONLY reason DV's are on petrol cars are due to the throttle body's butterfly valve which creates a massive pressure build up between that and the turbo impeller, putting stress on the shaft and stalling it, meaning a sluggish pick up. They're needed on all petrol turbo cars, but not needed on a derv due to there not being a butterfly valve and the engine injesting all the air created by them before its got time to build up.

Steve
arite ok :-k
 

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and thats straight from the horses mouth too ;)

simple reason is that the Derv injests all charge. Petrols don't. Petrols need somewhere to release this air so that the turbo doesn't stall and it lasts longer :mrsmiley:
 

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You CANT fit a dump valve on a turbo diesel, due to the simple fact that turbo diesel engines do not have a vacuum present in the engine like all petrol turbo engines have. You need a vacuum to make the dump valve operate.
 

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you best tell that to the Pug 306TDi lads, they get em to work nicely. Its a piece of piss to do anyway. you take the vac feed from the brake servo, through a solenoid and to the top of the DV. The solenoid is then triggered by a switch on the throttle. VERY easy to implicate :)
 
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