Hi, myine is 2011 JCW and i read some threads which said the BSH dual boost tap can do the blocking thing about vapors, so i bought one and installed it(i did build it up correctly). But when i restarted my mini, it sounded terrible and weak like asthma, and the engine shook like could be flamed out anytime, so i uninstalled it right away. Does anyone has this same situation with the dual boost tap? especially on MCS or JCW THX!

 

You need an oil catch can in addition to the dual boost tap for this to work properly. You can't just use that part alone?

What were trying to accomplish by just using the boost tap?

 

Had a BSH OCC and and BSH Boost Tap on my 2010 for awhile, but ended up taking the OCC off. Damn thing smelled like an old oil burning pickup every time I parked it in the garage after a drive. There was never a leak, so that wasn't it. Closest I could figure out was the hoses stinking every time it was hot. Was the most annoying smell, so I took the OCC off and it's been fine every since.

Left the boost tap, but removed the inner plug. Now I just use that tap to clean the valves with Seafoam now and then. Works perfect too, vinyl tube connected to the tap (on the screwed in nipple), other end in the bottle of Seafoam...with an aquarium adjustable air valve in the middle. At idle, open the valve and suck it like through a straw.

 

you don't NEED an occ in addition to the dual boost tap, but you wouldn't block off the boost tap unless you planned on using an occ. adding an occ to the OP's setup (assuming he doesn't already have one) would not solve his issue.

 

In his situation he would. He talks about blocking the vapors. Is it going to do that by magic?

2 uses here. You install the boost tap so you can hook up a boost gauge and or you use a catch can.

 

So you uninstalled it because it was working? That smell was the goop that was collected in the can. When I smell that stuff, I know its time to empty the can.

 

boost tap blocks off the vapors on the passenger side pcv valve so that all the crankcase pressure is evacuated by the pcv valve on the drivers side. you install an occ on that side to capture the oil and gunk. if you don't have an occ, the pcv valve still works as it normally would, but all the oil and gunk is recirculated into your turbo, i/c and eventually your intake manifold. not installing the occ should not be causing the issue the OP is having, UNLESS there has been an excessive amount of buildup in the turbo, i/c, etc.

 

i blocked the top of the dual boost tap, and there are 2 holes(i dont really know how is it called) one have to be blocked cuz the factory air filter, thats it.


and actually there indeed needs two oil catch can to block all of the possible vapors from intake or anyway the dual boost tap could be worked to instead of one, but i think the point is the dual boost tap thing has no filter which means it could suck anything from air include dust; second thing is i think the problem with the boost tap is it could not provide enough air which is less than from intake(i removed the "connector", and found there already had some oil and water mixed thing, and cleaned it up before i installed it). i know the dual boost tap could be connected to the boost gauge, but either way it could be used right.




actually my experiment of the BSH dual boost tap was successful, but i found the questions which i list above are quite inexplicable.

 

actually the engine after installed sounds like the first video, i think it just needs more air.
https://www.northamericanmotoring.co...t-r55-r56.html

 

Sounds like your BSH dual boost tap was leaking air. If you have a catch can, you're supposed to plug the opening that goes into the valve cover and the two holes on the side of the boost tap if you're not using a boost gauge. If no catch can, then just plug the two holes on the sides of the boost tap. If your car sounded like the one in the video then you had a vacuum leak.

 

OP did you have both small holes on the boost tap plugged?

 

Thank you guys! I think you 2 helped me to get the point xD.