The Detroit Tuned Bypass Valve is a re-worked new OEM valve that is modified by Detroit Tuned to eliminate the "Yo-Yo" in early year ('02-'04) Cooper S's, but is available for all Gen 1 Cooper S's. What is the "Yo-Yo" effect? It's the opening and closing of the valve around 2500 rpm's so that it feels like your stepping on and off the gas, but you're not. So we added a stronger spring to overcome the vacuum condition that it sees so that it will not open as soon or as much. Our BPV closes at 6" of vacuum, as opposed to the factory value of 0" of vacuum.
The DT BPV uses a stiffer return spring, resulting in quicker boost generation, and thus quicker throttle response and transitions. Most cars see about 1psi total @ redline. The butterfly assembly is also adjusted as much as possible to close fully, allowing for maximum boost. This is done by centering of the butterfly door and adjustment of the set screw that sets the openness of the butterfly. Perfect for the aggressive driver or racer. It is possible to see a very minor loss in fuel economy, but you will see a great improvement in throttle resolution and smoothness.
Every valve comes with full how-to instructions (below) and all necessary hardware. Easy to install in about an hour. No core charge. This only fits the 2002-2006/7 Cooper S with the Tritech motor.
Showing reviews 1-10 of 25 | Next
Posted by Ryan on 27th Feb 2015
My 2005 MCS threw the dreaded P1688 code, and research told me it's either a faulty bypass valve, or the crank pulley. I had no symptoms of a faulty crank pulley, so I decided to go with the more economical repair option. Install was very straightforward, thanks to the install instruction on DT's website. After getting everything back together, I took it for a short test drive, and had a smile on my face due to the improved throttle response. The 'yo-yo' effect is gone, and it pulls pretty good now. I'm very pleased. I highly recommend the DT bypass valve, whether you need it to replace a faulty valve, or just looking for an improved throttle response. You can't go wrong.
Posted by eric on 23rd Feb 2015
Just got installed and gives car an extra boost or pep and I gained extra 3/4mpg worth it amoung upgrade list . The stock had some light peeking from stop n bottom.
Posted by Pilero on 21st Feb 2015
Every where I look I hear only good things about Detroit tuned, had issues with yo-yo effect on acceleration, easy to order easy to install parts ...love the product and am super happy with the results love Detroit tuned bypass valve.
Posted by John Butcher on 28th Nov 2014
I installed DT Valve on my 2003 Cooper S few years ago, A friend bought a 2006 Gp, The DT valve was the first Mod I felt he should make. So bought him one.
Posted by mike on 26th Nov 2014
So after reading some great reviews on multiple websites, and experiencing the "yo yo" effect first hand, I ordered the DT bypass valve. Hands down one of the best upgrades I've made to my car. It feels so much smoother pulling away from a stop, and cruising down the freeway! The item shipped the same day I ordered it, and arrived much sooner than expected. Overall great experience. I have already recommended this to other mini owners and encourage anyone looking in to this upgrade to make the purchase. Well worth the money and then some!
Posted by drew golden on 3rd Nov 2014
After replacing my worn bpv with this unit I can really tell a differance in power (due to the old one leaking) better throttle response and better boost generation. I highly recommend this!
Posted by David Moore on 6th Oct 2014
I own an 02 r53 with just over 60k original miles on it. The previous did some very nice upgrades to sc, ic, and suspension. While doing a supercharger service I notice the stock bpv was still on there. Wondering why the previous owner who dropped about 5 to 7k didn't ever think of changing that. Oh well! Recently did dtbpv, silicone intake hose, and silicone intercooler couplers. Holy crap what a difference. Certainly worth 125! Thanks
Posted by Corey Mcilveen on 23rd Sep 2014
Put this part on over the weekend and since I have noticed a smoother ride and an increase in 3 mpg on the freeway! For hot arizona this is huge! Would recommend to fellow 03 Mini Cooper s owners!
Posted by Jamie on 18th Sep 2014
The BPV is very easy to install and I did it in under an hour including cleaning the throttle body. I noticed an immediate change in the car. The power comes on sooner and harder than before. Great modification. It seems that fuel consumption is about the same as before.
Posted by Unknown on 11th Sep 2014
High quality parts are used that improve on the OEM design offering smoother and faster throttle response.
Showing reviews 1-10 of 25 | Next