Originally Posted by
Enginetuner
The point of a blow off valve on a petrol car is to dissipate the pressure left in the system when the throttle is closed after a run on boost. As a diesel doesn't have a throttle, the issue doesn't occur.
Like the man said, why?
Of course, that ignores the small boy latent in us all!
have i missed something? diesels don't have a throttle?
i better have a word with vw as they've fitted one to my bora.
although fitted to help emissions, it's still there
fuel flow controls power/revs in a diesel so throttle never really shuts down full and hence the problem with a dump valve installation.