Muskrat
Well-known member
Probably it was supposed to have a seperate coupling with a vent hole in it, that the PO either lost, or didn't install. But like I said, I haven't noticed any negative effects, for the modest boost presures I'm running.
Now, maybe with a better quality MBC a vent is needed if the ball seals better, and holds pressure in the wastegate line. I'm not saying it's not needed, just that it's not needed for me.
A metal ball sealing against a brass opening with a fairly wimpy spring doesn't actually seal very well. It could be, if (er..when /ubbthreads/images/graemlins/devil.gif ) I turn the boost up past 20 psi I'll have issues. But I'm planning to run an in-cabin hallman when I get to that point, for ease of adjustability.
Now, maybe with a better quality MBC a vent is needed if the ball seals better, and holds pressure in the wastegate line. I'm not saying it's not needed, just that it's not needed for me.
A metal ball sealing against a brass opening with a fairly wimpy spring doesn't actually seal very well. It could be, if (er..when /ubbthreads/images/graemlins/devil.gif ) I turn the boost up past 20 psi I'll have issues. But I'm planning to run an in-cabin hallman when I get to that point, for ease of adjustability.
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