WHY CHOOSE TO FIT A BLOW OFF ADAPTER TO YOUR MINI COOPER S TURBO?
PLEASE NOTE: This will only fit the N14 Engine up to July 2010
HOW A BLOW OFF VALVE WILL IMPROVE YOUR MINI COOPS S PERFORMANCE
Your BMW mini copper S turbo utilizes a bypass facility which works by recirculating air around the turbo charger housing. The bypass facility allows charged air to flow from the boost side to the intake side of the turbo charger.
The BMW MINI ECU opens and closes a solenoid on the turbo charger which controls when the bypass facility is allowed to work. When under acceleration the turbo creates air pressure as the fan situated within the turbo spins. Each time a gear change is made the the throttle valve is momentarily closed and the but the turbo is still spinning constantly generating boost pressure.
The boost pressure generated is redundant and has no place to go which results in the turbo slowing down and being subjected to extreamly large volumes of pressure and stress. As soon as the throttle valve is opened again there is often a lag as it takes a few moments for the turbo to spin back up the required pressure generating sufficient amounts of boost.
To combat the problem of stress and turbo lag a Forge recirculation or diverter valve can be used. With the bmw Mini cooper s, when the throttle valve closes the ECU then opens the recirculation valve causing the excess boost pressure to flow from the boost side to the intake side of the turbo. This prevent the turbo from slowing down and get rid of the lag. The problem with this is that the turbo generates heat and the recirculated air is made hot. The cooler the air the more power available.
A forge blow off valve is a huge benefit as the hot air is dispersed into the atmosphere allowing only cold air to be drawn in increasing power and performance.
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