When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Hi everyone, this is my first time posting here, has been browsing this forum a lot since I got my F56 JCW.
I was searching BOV/diverter valve for f56 and found this picture on a chinese page. As my car is running Manic Stage 2 map with 1.5 bar of boost, the compressor surge is much more noticable than running stock map or chip tunning (was running racechip). I know B48 is using electronic wastegate to control boost and somehow "prevent" turbo surge, even with its Valvetronic (always open throttle body) fails to explain where the compressed air goes, hence we all get the turbo flutter/surge. I have attached the picture and please let me have your thoughts on adding a BOV to car.
Hi everyone, this is my first time posting here, has been browsing this forum a lot since I got my F56 JCW.
I was searching BOV/diverter valve for f56 and found this picture on a chinese page. As my car is running Manic Stage 2 map with 1.5 bar of boost, the compressor surge is much more noticable than running stock map or chip tunning (was running racechip). I know B48 is using electronic wastegate to control boost and somehow "prevent" turbo surge, even with its Valvetronic (always open throttle body) fails to explain where the compressed air goes, hence we all get the turbo flutter/surge. I have attached the picture and please let me have your thoughts on adding a BOV to car.
B46/48 use waste gates from factory, are you looking for external waste gate.
B46/48 use waste gates from factory, are you looking for external waste gate.
Intake side blow off valve, I know no one makes one yet because B48 does not come with that from factory.
I exminated my car when I was installing metal charge pipe and boost pipe as well as upgraded intercooler, there is no dump valve on the intake side of the engine.
The pressured, compressed air has nowhere to be release except going back to the compressor wheel and maybe "escaping" from the air intake, causing the surge and B48's turbo flutter sound.
The picture, which shows a BOV was installed right before the intake manifold on B48. I am kinda interested getting one installed on my car too, and I am seeking for some advices here. (I know B48 B58 do not have factory bov/dv like N54 etc, and I have read those articles how BMW gets rid of BOV using electronic wastegate and not using BOV on B48, the question is, Should we actually get one?)
I have read those articles how BMW gets rid of BOV using electronic wastegate and not using BOV on B48, the question is, Should we actually get one?)
The exhaust pressure equalization mechanism on the new turbos, which eliminates the blow off valve, is considered a major advance in turbo boost management technology. Can't imagine why one would wish to defeat this very, very advanced design feature.
On the N14 engine a Diverter/BOV served a purpose. It smoothed out the shifts when under acceleration and made radical changes in throttle position smoother by venting excess boost to the atmosphere. I had the Forge vacuum operated unit on my R56 and I will admit it worked like a champ and also sounded cool. That being said, on the B46/48 platform it serves no purpose other than as an expensive noisemaker. I recently saw a post on another forum where a member jerry rigged one. He was happy with the noise, but it served no useful purpose.
Im never a fan of putting things on cars that serve no purpose. The engine was designed without one for a reason. If it needed a BOV then they would have come with one.
Yeah, I don't get the fascination with the noise these new turbos make. With any of the many CAI (read hot) they sound like they've got the shivering fits. A proper BOV like the Forge unit I had on my R56 sounded pretty cool, but most important of all, it served a useful purpose mechanically.
Yeah, I don't get the fascination with the noise these new turbos make. With any of the many CAI (read hot) they sound like they've got the shivering fits. A proper BOV like the Forge unit I had on my R56 sounded pretty cool, but most important of all, it served a useful purpose mechanically.
I don't get it, why would the wastegate sound come from the CAI.
The waste bypasses to the exhaust.
Thats why it sounds louder with a straight through muffler.
Mine did!!
Just to throw a wrench into all this discussion, the parts catalogue for the new X2 M35i is now up online. it uses the B48 engine, though a different version from JCW, producing over 300hp from factory. the interesting thing I found when comparing part numbers, is that BMW has added a BOV to the cold side. Could this be that they have determined the increased boost levels of this engine version would put too much stress on the current wastegate only system, leading to premature failure of turbo components? If so, could these same failures be seen down the road in amped up MINI's without the addition of a cold side relief? And discuss..........
Just to throw a wrench into all this discussion, the parts catalogue for the new X2 M35i is now up online. it uses the B48 engine, though a different version from JCW, producing over 300hp from factory. the interesting thing I found when comparing part numbers, is that BMW has added a BOV to the cold side. Could this be that they have determined the increased boost levels of this engine version would put too much stress on the current wastegate only system, leading to premature failure of turbo components? If so, could these same failures be seen down the road in amped up MINI's without the addition of a cold side relief? And discuss..........
How does the wastegate help with not having a BOV? Is there someplace that explains this better? BOV helps prolong the turbo from unneeded back pressure when the throttle bodies slam shut. How did they redesign the turbo to overcome this?
Thanks!
12-06-2017, 11:27 AM
