[Porsche-O-Phile]

The MBC/EBC discussion has been debated ad nauseum. Generally, yes an EBC is a "better" system, although there is NO problem with running an MBC so long as it's maintained and the car tuned.

I would also put forth the position that an MBC is superior to the stock CV setup as I have yet to see a CV (particulally on our aging 951s) that isn't horribly prone to failure by the plastic nipples cracking off where they meet the body of the CV itself. I don't suppose I need to tell you that if this happens to the nipple going to the WG line (easy to do if that line gets caught on something or tugged on inadvertantly), you'll easily overboost the car and end up with bad things happening. As such, the advantage of a good MBC is that (1) it's new, (2) it's (usually) metal, and (3) it enables you to route the line to the WG intelligently on TOP of the engine where you can actually see it - not buried behind the engine where you have no idea what kind of condition it's in or even if it's connected.

When I recently cracked my (third) CV, I said "eff this" and went to an Accuboost MBC. It's been completely incident-free and works quite well. I check the tuning on the car about once a month as part of good general maintenance and I think that's perfectly adequate.

I will eventually go with an EBC and dual-port wastegate for an even "safer" (and more tunable) setup, but I sleep quite comfortably with my MBC in place - certainly more so than after I discovered a hard, brittle, cracking WG line and CERTAINLY more so than after I discovered my third CV had cracked at the nipple the "SUPRISE!" way (when I got on it and wondered why the boost was trying to slam my head through the headrest into the rear seat). Fortunately I figured it out and eased off and didn't damage anything, but the stock setup my certainly CAN and WILL fail. At the very least, get a new CV. First person to make a metal-cased one or one that otherwise gets rid of the crappy plastic **** will get my $$$ for it.