Jump to content

Turbo Diesel Dump Valve

Recommended Posts

Diesels like the 200/300Tdi, don't have a throttle, so a dump valve is useless.

Petrol engines have a throttle, which shuts when you lift your right foot to change gear. The turbo dump valve is beneficial when the throttle is shut, then opened wide again during acceleration through the gears.

Link to comment
Share on other sites

Save the money and play dump valve sounds on your stereo - that's all this guy is doing it for.

There is absolutely no point what so ever to fitting a dump valve to a diesel engine.

i always think that they sound like their "farting" in a diesel they never sound right

Link to comment
Share on other sites

dump valve? wassat then?

The thing that goes "psst" when you lift off the throttle on a turbo petrol engine.

As you lift off the throttle butterfly shuts and the pressure from the turbo builds

up in the manifold to a point where the turbo actually stalls. When you boot it again

the turbo has to spin back up to full speed. A dump valve opens the manifold to

atmosphere allowing the turbo to keep spinning.

It's basically to reduce turbo lag.

As mentioned above diesels don't have throttle butterflys so don't seal the manifold.

Dump valves are thus pointless on them.

Link to comment
Share on other sites

  • 2 years later...

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...

Important Information

We use cookies to ensure you get the best experience. By using our website you agree to our Cookie Policy