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    Green Classic & Vintage Spares

    Adjustable Dump Valve Twin Piston Atmospheric (TBV002.20B)

    Adjustable Dump Valve Twin Piston Atmospheric (TBV002.20B)

    £97.40
    £97.40 £97.40
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    TBV002.20B Misc Turbo Dump Valves & Boost Adjusters

    Motorsport Adjustable Dump Valve Twin Piston Atmospheric (Blue)
    Standard Range :- 0.5-1.2 Bar
    Uprated Spring Range:- 1.3-3.0 Bar (Supplied in the box)
    Available in Red,Black,Blue & Silver
    Size Range:- 20,25,34mm

    Dump valves are designed to vent unused pressure to atmosphere when the throttle has been released. When accelerating the turbo charger produces positive pressure which is used to supply the engine with large amounts of compressed air. When you lift the accelerator the throttle butterfly is closed and the boost has no escape route, so it backs up through the intercooler and causes back pressure that tries to prevent the turbo from spinning, this is known as compression stall.
    By fitting a dump valve every time you release the throttle the excess boost pressure will be released which means a significant reduction in turbo 'lag', contributing towards faster pick up between gear changes. In extreme cases on cars with high revving engines or large turbochargers the shaft within the turbo has been known to snap when no form of dump valve has been used.
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    Model Compatibility

    - Aston Martin DB6 1965-1970
    - Austin Mini Cooper S 1965-1971
    - Austin-Healey Sprite Mk III 1965-1971
    - Bentley T-Series 1965-1980
    - BMW 2000 CS 1965-1970
    - Daimler Sovereign 1965-1980
    - Ferrari 330 GT 1965-1967
    - Fiat 500 1965-1975
    - Ford Cortina Mk II 1965-1970
    - Jaguar E-Type Series 1 1965-1968
    - Lamborghini Miura 1966-1972
    - Lotus Elan S2 1965-1975
    - Mercedes-Benz 230 SL 1965-1967
    - MG Midget Mk III 1965-1974
    - Mini Clubman 1969-1980
    - Morgan Plus 4 1965-1971
    - Porsche 911 1965-1968
    - Rolls-Royce Silver Shadow 1965-1980
    - Sunbeam Alpine Series V 1965-1968
    - Triumph GT6 Mk I 1966-1973
    - Volkswagen Beetle 1965-1977
    - Volvo 1800S 1965-1969

    Part Number

    - Adjustable Dump Valve Twin Piston Atmospheric (TBV002.20B)
    - TBV002.20B
    - Misc Turbo Dump Valves & Boost Adjusters
    - Motorsport Adjustable Dump Valve Twin Piston Atmospheric (Blue)
    - OEM part number: TBV002.20B

    Shipping Information

    Standard shipping with tracking via Royal Mail or Evri for heavier parts:
    - £4.99 per order for standard 2-day delivery
    - £5.99 per order for Next Day delivery

    Most orders are shipped the same business day if ordered before 2pm. We ship Monday through Friday.

    If we unexpectedly run out of stock we may have to order your part which can take up to 1 week. We will be in touch in the rare circumstance that there is a delay to your shipment.

    Returns Policy

    We want you to be completely happy with your purchase but please do not hesitate to contact us immediately if you have a problem with your order. Please ensure that you consider all the points described on our profile page accessible by clicking our name above the product title.

    It is especially important that you take due care to ensure that the part you selected is compatible with your car. If in doubt, we'd prefer that you get in touch via our profile page so we can help you.

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