Diesel Dump Valves? Yey? Ney? - Page 2

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    #11
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    Dump valve on a diesel are unlikely to provide any improvement performance wise, but they can be fitted purely for the tshhhhh, many have, do and will fit them to their td for that reason alone.
     
     

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    #12
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    You can have a look at this link if you want an audible pppssshhtt.

    http://www.zen19051.zen.co.uk/prod01.htm
     
     

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    #13
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    No benefit at all, as you won't have a throttle butterfly, so all you're doing is dumping boost to atmosphere. I've had a couple of slightly madly tuned diesels in my time, so did a lot of research into it. If you had one of the very rare diesels with a butterfly, then there may be some benefit, but otherwise you're just dumping boost to atmosphere for no reason, and acceleration after gear changes suffers.

    Not to mention you also sound like a bus applying its air brakes.
    ~ Steve

     
     

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    mikaveli (14-09-2011)

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    #14
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    from what i've been told and seen it causes more problems than its worth tryin to fit a dump valve to a diesel
     
     

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    Hey

    As boy racerish as it is I never got to own a rs turbz and like the idea of a bov!!

    I''ve a e93 330d (2008), and just wondered if anyone who has experience with turbos etc could see the following causing any performance problems...I'm not bothered if I dont gain...but i dont wanna loose perfomance!!!

    PS soon to add a hybrid turbo!!!

    Rosh
     
     

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    #16
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    #17
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    Quote Originally Posted by RO54ANP View Post
    Hey

    As boy racerish as it is I never got to own a rs turbz and like the idea of a bov!!

    I''ve a e93 330d (2008), and just wondered if anyone who has experience with turbos etc could see the following causing any performance problems...I'm not bothered if I dont gain...but i dont wanna loose perfomance!!!

    PS soon to add a hybrid turbo!!!

    Rosh
    Diesels have zero need or use for a dump valve, in fact many BM dervs use variable vanes, which are better than conventional turbos and because of the vanes theres no sudden pressure to get rid of like a petrol with a conventional wastegate.

    As a result, dumping pressure to atmosphere will just produce the sound, but thats about it and may indeed lower performance or increase lag. Both mute points with a variable vane turbo anyway.

    Spend your money on something beneficial, one of my neighbours has an Audi tdi with a dump valve fitted and everytime they pass and tshhh my eyes roll in embarassment for them
     
     

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    #18
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    Quote Originally Posted by CharleyNokia View Post
    You can have a look at this link if you want an audible pppssshhtt.

    http://www.zen19051.zen.co.uk/prod01.htm
    I kinda like the sound of that..


    BMW 2003 320d Sport
     
     

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    #19
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    dump valevs on a diesel - waste of time
    get a hard pipe to turbo, airbox delete, i did this on my 325 tds, ull love hearing the turbo spool and best of all, ull get that 'pshhhh' change when going on to over run (throttle lift off), not as loud as a dump valve but noticable
    1993 E36 BMW 325 TDS with:

    egr delete
    super chipped
    boost controller @1.5 5th gear bar boost
    De cat pipe
    straight through turbo back, no backbox
    hard pipe turbo to induction filter
    Pefrormance FMIC with custom mandrel IC piping
    Water / methanol injection (being setup)
    increased injector duration (being setup)
    13t turbo upgrade (being setup)
    Solid engine mounts, braced front and rear, coilovers, lots of smoke
     
     

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    Quote Originally Posted by 328mark View Post
    they're plumbed into the induction pipework somewhere and tell you what pressure the turbo is making...no real intrinsic value to you as a driver,but nice to see your blower is blowing.
    So how can you read boost before the turbo
    Best place to source boost is the vacuum line running to the MAP sensor
     
     

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