Dump-Valves, the technical bit.

Dump valves (also known 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 turbocharged car. When accelerating the turbocharger produces boost (positive pressure) which is used to ‘Force feed ’ the engine with large amounts of compressed air. When you lift off 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 stop the turbo from spinning, this is known as ‘compressor 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. A counter product of the reduced back pressure is that the turbocharger itself will last longer as less thrust load is placed on the delicate internals. These two reasons are why re-circulating dump valves are now fitted as standard equipment on most turbocharged production cars, albeit of sometimes compromised quality. After many years of exhaustive testing on a wide variety of both road cars and high powered race cars, Bailey Motorsport introduced the Piston design 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 our ‘EVO ’valve the ability to work on cars with airflow meters. (not possible with diaphragm type dump valves)

Piston re-circulation Dump-Valves

All the benefits of our piston design, but with 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 Bosch valve is made of plastic, contains a rubber diaphragm and is known to fail when subjected to too much boost pressure or excessive temperatures. The DV30 is the perfect choice for a standard car or fire-breathing 550+BHP tuned vehicle, capable of withstanding huge amounts of boost with its high temperature piston internals and CNC machined body. As the DV30 is designed to direct the dumped boost back into the DV30

WATER HEADER TANKS

All Bailey alloy header tanks are designed as direct replacements for the original, with no special tools or hoses required, making them a true fit-it-yourself product. They are fabricated from the best quality aluminum which is highly polished to a mirror-like finish and are now supplied with a high pressure cap (1.3bar) included in the price. Here are some of the many benefits:

- HIGH STRENGTH - Standard plastic tanks can crack or split with age (especially on high powered turbocharged cars running lots of boost!) but a Bailey tank is indestructible, even on our own 500+ BHP race cars.
- CONSTANT PRESSURE - By using our 1.3 Bar (19psi) cap, you are raising the pressure within your cooling system which effectively raises the boiling point of the water, keeping your car cooler for longer
- COOL LOOKS, THAT LAST - Never has a simple water tank looked this good. Our tanks are used on many show winning and magazine feature cars and if regularly polished will probably outlast your car!
- KEEPING LEVEL - Some vehicles have a water level sensor fitted as standard and our tanks allow the standard sensor to be re-used.

OIL SEPARATORS

Car manufacturers spend thousands of pounds developing efficient breathing systems for their cars, which usually work perfectly okay for a standard model, but once the engine RPM or power output is raised (cams, increased boost pressure etc...) the standard system is no longer 'good enough'. Our breather systems actually separate the oil into vapor and liquid, which gives 3 major benefits:-
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REDUCED CRANKCASE PRESSURE - Freeing up crankcase pressure by increasing the capacity of the breather and adding more or larger breather pipes, has the result of reducing oil blow-by. This means that quite simply your engine will perform better for longer as the tough job of controlling the oil breathing system is taken care of by the Bailey Oil separator.
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OIL RE-CIRCULATION - Because our oil separators are designed to return the oil back to the engine sump your oil will last longer (saving you money) and the risk of running out of oil (whoops!) is reduced. The small amount of unwanted oil vapors that are separated from the oil are vented under the car to atmosphere.
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MIX AIR AND FUEL, NOT OIL - The standard Cosworth breather system vents un-used oil vapors back into the air box, which means that older engines will have a small puddle of oil in their air filters! Engines mix air and fuel to produce power, but introducing oil as well leads to increased chances of detonation, which nobody wants

SWIRL POTS

We produce aluminum swirl pots for the Ford Sierra/Escort Cosworth, Escort RS Turbo and Fiesta RS Turbo. Designed to be used with our header tanks, these pots fit into the radiator top hose and their function is to swirl the incoming water, removing air bubbles through the spout in the top which is fed back to the header tank. Removing the air caused by localized boiling within the cooling system will allow the water to have a more stable operating temperature. Once the air is removed your radiator will work more efficiently, as air is a bad conductor and will stop your water from cooling. Our swirl pots have been developed from our 10 years race experience and swirl the water properly.