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Bailey Dump Valves Aldon Automotive
| Dump valves (also know as blow-off valves) are not a new idea and have been around since the early 1980’s. Their function is to release un-used boost pressure when lifting off the throttle of a turbo charged car. 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. Bailey Motorsport introduced the Piston design dump valve in 1997. Piston dump valves have many advantages over their diaphragm style counterparts, including faster reaction times, increased boost capability and in the case of the ‘EVO’ valve the ability to work on cars with airflow meters. The DV24 single piston dump valve is designed for turbocharged cars that use a carburettor, throttle bodies or fuel injection with no air flow meter. The DV24 dump valve has a 60psi boost capability. The DV26 or ‘EVO’ twin piston dump valve is designed for turbocharges cars that have fuel injection with an airflow meter or metering unit. The ingenious second piston allows cars to idle perfectly and for fuel mixture to be unchanged which resolves all the running problems traditionally associated with diaphragm valves. The DV26 also has a 60psi boost capability. The DV34 and DV36 valves are an exciting new range of atmospheric valves designed with a single ‘Venturi’ style trumpet outlet. The DV34 is the single piston model, suitable for cars with no airflow meters and the DV36 is the twin piston model for cars with airflow meters. Piston ‘Re-circulating’ Valves These have all the benefits of the piston dump valve design, but with a less audible ‘whoosh’. The DV30 was originally designed as a direct replacement for the factory fitted Bosch dump valve found on a wide variety of cars. The DV30 is the perfect choice for a standard car or 550+ tuned vehicle, capable of withstanding huge amounts of boost with its high temperature piston internals and CNC machined body. This dump valve is generally speaking ‘silent’ in operation and can alleviate any annoying ‘fluttering’ noises in many ‘Bosch’ equipped applications. It is considered an essential upgrade for any vehicle with the VW/Audi 20v 1.8 turbo engine. These are available for most popular turbo’d vehicles. The dump valve kits are designed with DIY fitting in mind, they come packaged with car specific fitting instructions and all components required to complete installation. If your vehicle was equipped from the factory with a re-circulating valve, these kits will either remove or blank off the O.E. valve so that the new dump valve can function correctly. |
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