Hey all, I was curious if anyone else is having trouble with there r53s after changing the stock BPV to the DT BPV? I noticed a jerking, weird shifting-revving and loss of MPG by at least 3-5 MPG. Is something else wrong?

 

I could have told you that was gonna happen... It's not for everyone take it out and sell it.

 

Yea I am already considering this option. What makes it so shitty though? Did you install one at some point BAV?

 

I was given one by a friend when he sold his r53 but i hated it on his car so I sold it on here a year ago or so.

 

Yea I'm going to take it off and sell it too. What makes it mess with the car so bad? Also is it hard to take off?

 

Just a stiffer spring, that's why it's not like that from the factory. It's for hardcore driving styles I suppose.

 

True. I should have went with my gut feeling before having it installed. Thanks for your help.

 

Steffen,

We will be the first to tell you our valve isn't for everyone, as it is going to change how the transition from vacuum to boost comes on, as well as a change in how it "feels". We have noticed that there is a slight fuel economy dip with our valve, but it was designed with multiple fixes in mind; to eliminate the yo-yo effect produced by weak BPVs and to also produce quicker transition to boost.

The valve closes at a lower vacuum than the factory valve which is where you are seeing a depreciation of MPG, but this is part of the performance aspect of the valve.

If you would like to talk with us about this more I would be glad to go over any information you may want/need.

Nick
Detroit Tuned
586-792-6464

 

Thanks for the quick reply. I am not in anyway bashing the product, I just don't think it was for me as this is my daily driver. I just was thinking the yoyo effect was present on my stock BPV but now that this one is on I don't feel that was ever the issue. Thanks for the response.

 

It's a great product, especially for high hp r53s, which is why my friend had it on his car. Just not for everyone, and the mpg loss is disclosed on their site.

 

I put a DT BPV on my R53 when the stock one died a few years ago....and experienced the same thing. It's a given.....the spring in the DT BPV is stiffer, so it's going to close sooner and start to build boost under the less engine vacuum (engine load) vs. the stock BPV.

I think I lost around 1-2mpg.......I didn't think it was a big enough deal to pull it out and put a new OEM one in place of it. I did like that it got rid of the yo-yo that stock BPV had.

You have to also keep in mind that you are probably driving the car a little harder....trying to see how the new BVP feels, so 1-2 of your 3-5 MPG loss is probably from your own foot.

 

I had a similar experience to the OP. Sold mine here for a small loss. Some people like the feel and don't mind the mileage drop. Perhaps it is better if you get the car tuned with it?

 

Yea its possible but I since mine is a DD I don't plan on tuning it. I will just sell it for a loss and motor on!

 

just buy a brand new oem and you'll be good to go.

 

Try driving around with a lighter foot on the gas for a week or so....you might be surprised....you shouldn't be getting 5mpg worse just from the dt bpv.

 

Can you, or anyone here, describe what "the yo-yo effect" is? I think I know, but it would be great if someone could describe their experience with it.

 

When I had my stock BPV.....when ever I would be in a certain situation when I'd be going up a slight hill or incline, and I had to give the car just enough gas to maintain speed......you could feel the bypass valve starting to close, and the motor would gain power from the boost, then the valve would open a little bit....and loose a little power......back and forth, back and forth. It felt like you were on and off the gas a few times every second. The valve would kind of "flutter". If you gave it a little more gas it would go away, or if you let off the gas a little bit it would go away.....there was that "sweet spot" where if everyone was just right, it would start to yo-yo.

My DT BPV will do it on a very rare occasion.......but nothing like the stock one did. The main reason I got the DT BPV was because the spring in the stock BPV broke, and it would not develop any boost at all. Awesome MPG.....but no power

I'm surprised someone hasn't came up with an adjustable BPV where you could dial up the spring tension if you want your boost to come on early for more low end power......or dial it down if you don't want the boost to build unless the pedal is completely to the floor.....that way you never get into boost during normal driving......= much better MPG.

 

And they could fit a little motor and wire it into the cabin with three different modes of driving.

 

Probably not that hard to do with a little linear solenoid and rotary dial controller. I can imagine it might be hard to find the space you need to mount it to the BPV...its pretty tight in that area.

 

Is that was causes it?! So annoying. I have that issue with my DT BPV, but never had it with my stock one. I love the power that's there when the BPV closes, but the herky jerky stop and go traffic can get annoying.

 

Yea same here the rough and jerking ride and loss of MPG is way to much for me too aggressive

 

The DT BOV is supposed to get rid of the yo-yo issue....not make it worse
. I've never heard anyone say that the DT BPV made it worse....until now....and I'm sure there are hundreds of minis out there running them.


Are you guys sure you don't have some other issue going on? Vacuum leak?? If you have a boost gauge, you could see exactly what was gong on.

 

2004 R53, 105K...
My experience is from a dead stop in daily driving: since it takes a split-second longer (than a N/A engine) for the S/C to spool up power, I have to delay dropping the clutch more than I normally would - same with most upshifting. If I do let out the clutch too soon or too rapidly from a stop, it slows the engine too quickly and the engine can't recover fast enough to counter the bear, so the car falls on its face - and then back to where I started with no forward motion. I had always felt that this was a BPV issue - the valve not staying closed to build S/C pressure - but I did the spring check (with my fingers) and it seems to be closing quickly and firmly.

I would change out the BPV if I thought it was the problem, but the "test" makes it seem like it's working fine. The Mini drives great with no problems or codes, it's just this one niggling annoyance...

 

I wouldn't go by how it feels by hand, if you have over 100k miles or have upgraded boost i would replace it.

 

The stock valves are pitifully adjusted, the butterfly is horribly uneven and the set screw is at times run too far down causing the butterfly to hang open even under full boost.

Our valve does create a slight jerky reaction at low parking lot speeds in some applications, but you may feel that the car seems to "snap" into power with our valve because of the sudden change in pressure.

As for a mileage decrease of 3-5 MPG, there must be other issues going on. We have seen reports on even our own vehicles of 1-2 MPG, but in our line of work we don't really drive our cars for the economy.

If the DT valve doesn't suit your liking or driving style, we do stock the factory valve which we can even adjust prior to shipping out.