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Thread: dump valve?

  1. #1
    Regular Member wingers1982's Avatar
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    Default dump valve?

    my friends keep saying put a dump valve on my car and i do i like the sound of them ( i had one on my impreza wrx i use to own ) do they work on diesels? help im confused my brain hurts

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    Regular Member Craig1985's Avatar
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    id like 1 too? dnt know if they wrk? duncan will know or spoons?

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    Regular Member wingers1982's Avatar
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    yeah it works just dont know if it'll screw something up

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    Regular Member Signum_CDTI's Avatar
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    someone I knew put one on a Focu TDCi - sounded like an HGV lettin off its airbrakes - pressure was really high

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    Regular Member Danwells72's Avatar
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    Vehicle : Vectra

    Trim : Sri

    Engine : 1.9 cdti 150

    Year : 2004

    Default

    Its electronically controlled. I fancied one then couldnt be arsed with wiring up and the extra parts

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    [Ex]Admin Duncan's Avatar
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    You can fit a dump valve to diesels but there isn't really that much point. As Diesels have no throttle valve (Inlet direct to cylinders) you won't get the closed throttle pressure build up of a Petrol Turbo and therefore no gains/advantage.

    To use a dump valve on a diesel involves wiring in a microswitch, usually to the throttle pedal, to activate the solenoid to open the dump valve (to dump the excess boost).

    They don't give any more bhp or torque, but they can, if adjusted correctly, quicken the spool up (slightly) of the turbo through the gears.

    Search for 'dump valve diesel' to bring up a few threads. Nutron fitted one. Not sure what it did for him, or whether he's got it on his current car - you'd need to read through the threads. I think others may have fitted them too.

    On a diesel, it seems a lot of faff for no real benefit from what I remember.

    The other ones you can fit are the electronic ones that simply make an electronically generated sound, activated by a microswitch on the throttle pedal, to make the noise of a dump valve. Very, very naff indeed.

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    Quote Originally Posted by Duncan View Post

    The other ones you can fit are the electronic ones that simply make an electronically generated sound, activated by a microswitch on the throttle pedal, to make the noise of a dump valve. Very, very naff indeed.
    Can you get them that make your engine sound like a Ferrari V12 as well? LOL

    The other alternative is of course is to sell the Vectra and buy an 'Impreza'.They're jolly good fun,but gutless as hell and love petrol stations.
    Last edited by diesel dog; 15th February 2008 at 14:57.

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    Regular Member wingers1982's Avatar
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    i had the impreza wrx import running 330bhp at the wheels it wasnt gutless at all it scared me to death but i agree loved the petrol stations loved the sound to death use to make people jump and heads spin very good fun

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    Quote Originally Posted by wingers1982 View Post
    i had the impreza wrx import running 330bhp at the wheels it wasnt gutless at all it scared me to death but i agree loved the petrol stations loved the sound to death use to make people jump and heads spin very good fun
    "Gutless" in the way that unless you had 4,000 rpm on the rev counter nothing really much happened when you hit the gas.There has to be some trade off for all that top end poke I guess.Great fun when you're in the mood,irritating as hell when you're not.
    Last edited by diesel dog; 16th February 2008 at 01:34.

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    Default

    it will i know it does and im not saying a word but no switches needed and how to is it part of a bigger ongoing plan it's all hush hush and i dont know anything about it anyway but here is a littel tester for you all to see

    [IMG][/IMG]
    im i good or what

    and where is this going ,,,,,,,down there to the intercooler


    [IMG][/IMG]

    and this isnt the finished job ,, it gets so much better much better you will all have to wait and see whats it all about on the 24th of feb
    Last edited by chrisgettings; 16th February 2008 at 02:31.

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