Blow Off Adaptor for N14 Engine for Mini, Peugeot, Citroen DS3 (Pre 2016 Only)
We recommend servicing your valve every 3 years, or 20,000 miles, whichever comes sooner
The FMDVMCS is a sandwich type adaptor that fits between the existing electrical solenoid and the turbo charger 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.
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 by means of 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 you 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 no where to go. (This is a bit like putting you 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 alot 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, boost pressure and there is a pause or a "Lag" before the engine is producing the required power once again.
To combat this loss of power and stress on the turbo, a recirculation or diverter valve is used. On the Mini, when the throttle valve closes, the engine management opens the recirculation route around the turbo. This gives the charge air an alternative route and allows the turbocharger to keep spinning so that when you accelerate again there is no "lag" or waiting period. This system works well and is adopted by nearly all vehicle manufacturers on turbo charged petrol engine applications. The only downside to this system is that a turbo chargers produce heat. (The hot air that leaves a turbo is cooled by passing it through an intercooler before it enters the engine. The cooler the air the more power is produced). By recirculating the hot air back into the intake side of a turbo the temperatures increase. This is where the Blow Off or Dump valve plays its part. By expelling the charge air to atmosphere rather than recirculating it, you do not increase the intake air temperature but you do allow the turbo to keep spinning. The side effect which is unacceptable to most vehicle manufacturers is the noise of the valve expelling the air.
By fitting the FMDVMCS between the existing solenoid and the turbo housing (this involves removing only 3 bolts) the air is re-directed to atmosphere rather than recirculated. It should be noted that the engine management also uses this valve to decrease engine power when necessary. An example of this is by the (DSC) Dynamic Stability Control system. Although you would not normally hear this occurring, when a blow off adaptor is fitted you may well hear the air being expelled when the DSC operates (going too fast around a bend for example).
In The Box
1 x FMDVMCS Adaptor
3 x Socket Cap Bolts
1 x Instructions
1 x Forge Sticker
In order that you purchase the correct valve for your vehicle please refer to the fitment table below before ordering.
| Product Code | Fitment |
| FM207V | Recirc Valve N14 Engines Cooper S 2007-10, JCW Cooper S 2007-2012 |
| FMDVR60R | Recirc Valve N18 Engines Cooper S 2011 On, JCW Cooper S 2013 onwards |
| FMDVMCS | Blow Off Adaptor Plate For 2007/8 Cooper S Turbo only |
| FMDVR56A | Blow Off Valve N14 Engines Cooper S 2007-10, JCW Cooper S 2007-2012 |
| FMDVR60A | Blow Off Valve N18 Engines Cooper S 2011 On, JCW Cooper S 2013 onwards |
This product is available in machined alloy finish only.
N14 Engine Mini
Mini R56 Cooper S 1598ccm 174HP 128KW
Mini R56 John Cooper Works 1598ccm 211HP 155KW
Mini R57 Cooper S 1598ccm 174HP 128KW
Mini R57 John Cooper Works 1598ccm 211HP 155KW
Mini Clubman R55 Cooper S 1598ccm 174HP 128KW
Mini Clubman R55 John Cooper Works 1598ccm 192HP 141KW
Mini Clubman R55 John Cooper Works 1598ccm 211HP 155KW
We have a 14-day return policy, which means you have 14 days after receiving your item to request a return.
To be eligible for a return, your item must be in the same condition that you received it, unused, with tags, and in its original packaging. You’ll also need the receipt or proof of purchase.
To start a return, you can contact us at info@jbmperformance.co.uk. If your return is accepted, we’ll send you a return shipping label, as well as instructions on how and where to send your package. Items sent back to us without first requesting a return will not be accepted.
You can always contact us for any return question at info@jbmperformance.co.uk.
Damages and issues
Please inspect your order upon reception and contact us immediately if the item is defective, damaged or if you receive the wrong item, so that we can evaluate the issue and make it right.
Exceptions / non-returnable items
Certain types of items cannot be returned, like perishable goods, custom products (such as special orders or personalised items). We also do not accept returns for hazardous materials, flammable liquids, or gases. Please get in touch if you have questions or concerns about your specific item.
Unfortunately, we cannot accept returns on sale items or gift cards.
Exchanges
The fastest way to ensure you get what you want is to return the item you have, and once the return is accepted, make a separate purchase for the new item. Please note that the customer is responsible for ensuring the correct part is ordered and fits the vehicle it purchased for.
Refunds
We will notify you once we’ve received and inspected your return, and let you know if the refund was approved or not. If approved, you’ll be automatically refunded on your original payment method. Please note the Exceptions / non-returnable items section, which states there are no returns for perishable goods, custom products (such as special orders or personalised items). We also do not accept returns for hazardous materials, flammable liquids, or gases. Please remember it can take some time for your bank or credit card company to process and post the refund too. Some refunds may incur an admin/restocking fee.
