The ALTA Blow Off Valve Spring upgrade is a better alternative to the
more expensive complete replacement BOVs other competitors sell. Our
competitors sell you the JCW replacement part which is an upgrade for a
MCS, but not for a JCW. Alta took this a step further and created this
simpler, better performing spring upgrade that is for both JCW and MCS
So Simple, Yet So Effective
The ALTA BOV Spring Upgrade for your stock Blow Off Valve (BOV) is a
very effective way to make your turbocharged MINI hold more boost
between shifts, reducing turbo lag. This stiffer spring allows the BOV
to function normally during normal operations but keep more pressure in
the boost tubes, making it feel much faster shifting.
Installs In About 30 Minutes!
Anyone with proper tools can install this part in under 30 minutes.
Simply remove a couple of OEM parts, remove the electrionic BOV and
replace the spring with the ALTA version and you're done!
Tested to hold 40PSI of boost!
This test fixture was created to be able to test the spring on a bench
before it was installed on a car. This allowed Alta to test as much
pressure as they wanted and make sure the BOV functioned as it should.
Let's just say, this BOV holds and vents more boost than you will ever
Key to the design of this part is ensuring the spring is not too stiff.
Because this is an electromechanical device, it was important that the
electronic part of the system (solenoid) was still able to open the BOV.
Alta settled on a spring rate that was about 50% higher than the JCW,
which is tested to work perfect beyond 40psi of boost!
So Many Features!
Our competitors simply re-sell the JCW Electronic BOV as an upgrade for
your MCS. If you disect what makes these different, you will find the
entire part to be the same except one item, the spring.
50% stiffer seat pressure than JCW BOV spring.
Installation time is roughly 20 minutes.
Custom Made Heat treated 17-7 Stainless Steel Spring
Rated for over 7,000,000 cycles
Makes turbo more repsonsive between shifts/less turbo lag
Hold and vents 40psi perfectly!
Cheaper than the entire BOV competitors sells.
What is a BOV?
A BOV (blow off valve) diverts pressure out of the boost system during
certain driving conditions. On a turbocharged car under full throttle,
boost is built up in the boost tube system and as soon as you lift
throttle the throttle plate closes and the built up pressure has no
where to go but backwards through the system. This is a form of
compressor surge, which is damaging to your turbo, and can hurt
performance as the "backup" of pressure slows the turbo down or
sometimes can stop it.
A BOV is used to vent this build up of pressure during throttle lift
conditions. The Mini Cooper S and JCW have BOVs that are controlled by
the ECU which are large solenoids that when energized opens up a valve
and dumps the built up boost. The ALTA Spring is a stiffer spring to
make the valve close faster after shifts and hold more boost in general.
The ALTA Blow Off Valve Spring is one of the many MINI Cooper Parts and Accessories that we carry and will fit the following MINI Cooper Models and Years:
R55 MINI Cooper Clubman: 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015
R55-S MINI Cooper S Clubman: 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015
R56 MINI Cooper Hatchback: 2007, 2008, 2009, 2010, 2011, 2012, 2013
R56-S MINI Cooper S Hatchback: 2007, 2008, 2009, 2010, 2011, 2012, 2013
R57 MINI Cooper Convertible: 2009, 2010, 2011, 2012, 2013, 2014, 2015
R57-S MINI Cooper S Convertible: 2009, 2010, 2011, 2012, 2013, 2014, 2015
R58 MINI Cooper Coupe: 2011, 2012, 2013, 2014, 2015
R58-S MINI Cooper S Coupe: 2011, 2012, 2013, 2014, 2015
R59 MINI Cooper Roadster: 2012, 2013, 2014, 2015R59-S MINI Cooper S Roadster: 2012, 2013, 2014, 2015
R-Fifty WHAT?? Confused about what model MINI you have? We’re here to help. Check this out for more information.