Universal auto aluminum part turbo blow-off valve bov sound Adaptor for N14 Engine for Mini, Peugeot, Citroen DS3  FMDVMCS

Atmospheric Blow-Off Valve Adaptor 

Wholesale High-quality auto turbo Blow Off Adaptor for N14 Engine for Mini Peugeot Citroen DS3 bov020

Material: High-quality Aluminum alloy

No glitches

Quantity: 1 PCS

The BOV-020-SI is a sandwich-type adaptor that fits between the existing electrical solenoid and the turbocharger housing on the BMW Mini Cooper S N14 engines 2007/08(R56/57 *), Peugeot 1.6 turbo engines as found in the 207 and GTI, 208 GTI, 307, 308 and Citroen DS3.

In The Box
1 x Blow-off Adaptor 
3 x Socket Cap Bolts

On these engines, built into the turbocharger housing, is a bypass facility. This allows charge air to be recirculated around the turbo charger from the boost side back to the intake side. This recirculation path is opened and closed using an electrical connection from the engine management, to a solenoid that is mounted on the turbocharger housing. As you accelerate, the turbo charger vanes are spinning, and boost pressure is increased, literally blowing into the engine cylinders. Then when you change gear, you take your foot off the accelerator momentarily, select the next gear, and accelerate again. As you take your foot off the accelerator the throttle valve to the engine closes. The problem here is that during this process the turbo is still spinning and the boost pressure that it is producing has nowhere to go. (This is a bit like putting your hand over a hair dryer so the air cannot get out) What happens at this point is the turbo starts to stall, the spinning vanes slow down (incurring a lot of stress), and the boost pressure drops. When you open the throttle valve again by pushing down on the accelerator (demanding more power) the turbo has lost its momentum, and boost pressure and there is a pause or a “Lag” before the engine produces the required power once again.