No, that has nothing to do with the BPV……that is just how a small little inline 4cyl motor feels when you are at low RPMs, especially a 4cyl motor with a supercharger that’s bogging it down even more at low rpms. If you look at a dyno graph for just about any MINI S, you will see that at low rpms (under 2000rpms) they are only making around 40hp and 70 ft/lbs of torque…. They will always feel doggy and underpowered until you get the rpms up around 3000 or so and the supercharger starts making decent boost, and actually starts pulling its own weight as far as HP improvement to the motor vs. how much HP it’s robbing from the motor in order to turn it.

It took me a long time to get used to driving my mini after being used to driving cars/trucks with big V8’s. The power and torque they have right off of idle is amazing compared to a mini……you just have to get used to keeping the rpm’s up higher to have power on demand……and get used to feathering the clutch pedal a little when taking off. My mini is honestly one of the most tricky stick shift cars I’ve ever driven…..as far as taking off from a dead stop. They have absolutely no power or throttle response down low at all.

 

I agree with iq, very little power down low needs boost to get anywhere.

 

Yea that is a better way to look at it. Especially when you have the heat or AC blasting the car seems to not want to move from a stop haha

 

I totally get the gutless engine thing at low RPMs, I just thought it more severe than it should be - the way the car just falls flat on its face in that case. I have also had to learn to feather the clutch better but I don't like doing it on load as it heats up and wears the disc more than I'm comfortable with. I pride myself on making clutches last.

I also resist throwing parts at cars just for grins or because it's over 100K miles. While I don't think a new (DT or OEM) BPV would hurt, that's $100 I could spend on something the car really needs. Like a pulley, belt and tensioner, LCA bushings, engine mount...

 

Agreed, I am starting to look at my MINI with 130k the same way

 

As long as you BPV snaps shut with some force when you pull the lever open with your finger and then let it close on its own...its ok. When they go bad, the spring breaks, and it wont snap shut. That's when you know its time to replace it. If it snaps shut.......its fine, don't replace it.

 

Yea my stock one I took out is fine I made the mistake of buying a new one and not seeing it in the closet.. oops

 

not necessarily, the spring weakens and won't hold boost properly. It can still close with decent force and not seal like it should.

 

Well I am glad I ordered a new OEM one then!

 

It is typical to see a decrease in mileage as the engine stays under boost longer when you let off the gas, and because it closes sooner.

I just use the stock bypass valve but always adjust the stop so it is 100% closed because off the shelf they always have a slight crack in them open.
http://www.waymotorworks.com/oem-min...e-r52-r53.html

 

If I was to order one from you guys would you adjust it or is it something I can do myself?

 

Yes we adjust all them closed before we ship them out

 

Since I bought my R53 used last year (from 2nd owner), I have little information about any upgrades or repairs from the past three years. Is there any way to tell if my BPV has been replaced; further, if it's been replaced with a DT? Everything's still on the car, so I'm sure I'll have to pull the TB assembly, but is there an obvious differentiation?

 

Ok awesome! I will let you know before I place the order thanks. Does the 100% closed adjustment effect the gas mileage?

 

is this adjustment easy to do? I am wondering if mine isn't closing all the way. I was at 16 psi last year in the heat, now im roughly at 15 in the cold, and don't get to 15 until 4200 rpm

 

You should be making more boost when the air is colder...and denser.

 

How are you guys checking boost numbers?

 

I use an Autometer mechanical vac/boost gauge.

 

very easy it's like one screw if I remember correctly

 

Is this a hard gauge to hook up?