Martin90 Posted June 18, 2007 Share Posted June 18, 2007 I wsa at a trial on Sundau and there was a 200TDi with a turbo dump valve. Making lots of nice rally car style noises on gear change but are they of any benefit on a diesel? Martin Quote Link to comment Share on other sites More sharing options...
Bush65 Posted June 18, 2007 Share Posted June 18, 2007 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. Quote Link to comment Share on other sites More sharing options...
LandyManLuke Posted June 18, 2007 Share Posted June 18, 2007 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. Quote Link to comment Share on other sites More sharing options...
kiall Posted June 18, 2007 Share Posted June 18, 2007 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 Quote Link to comment Share on other sites More sharing options...
Martin90 Posted June 18, 2007 Author Share Posted June 18, 2007 As I thought, thanks guys. And no, I won't be fitting one, was just curious! Martin Quote Link to comment Share on other sites More sharing options...
nobber Posted June 18, 2007 Share Posted June 18, 2007 dump valve? wassat then? Quote Link to comment Share on other sites More sharing options...
nige90 Posted June 18, 2007 Share Posted June 18, 2007 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. Quote Link to comment Share on other sites More sharing options...
DiscoGlover Posted June 26, 2009 Share Posted June 26, 2009 sorry for the mega bump but is the 'ppss' sound even produced? Quote Link to comment Share on other sites More sharing options...
Hamish Grundy Posted June 26, 2009 Share Posted June 26, 2009 sorry for the mega bumpbut is the 'ppss' sound even produced? have a listen to this, 40secs in, i dont have a dump valve but thats what it would sound like. mines just the turbo. Quote Link to comment Share on other sites More sharing options...
Hamish Grundy Posted June 27, 2009 Share Posted June 27, 2009 have a listen to this, 40secs in, i dont have a dump valve but thats what it would sound like. mines just the turbo. mines a 300tdi by the way. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
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.