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RarlyL8 RarlyL8 is offline
Crotchety Old Bastard
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Join Date: Jan 2000
Location: Huntsville, AL
Posts: 13,563
If you are tied to using all of those devices and that intercooler then you have little to lose by attempting the sharing of vac ports.
Optimally all of these devices need their own large vac port and should not share unless the port is large enough to support both or if both devices are not open at the same time (which isn't the case). You typically don't need both AAV and AAR. I would ditch the AAV in favor of a throttle bipass valve (TBV) if you are looking to reduce exhaust cackle on decel. The current setup on my personal car has niether AAV or AAR, only a 965BOV and TBV. I am near the end of designing an intercooler that fits both stock and 965BOV configurations and have been working with all the issues you are now experiencing. There will be enough ports to accommodate all of these devices.

Mark, one side issue with the BOV open to ambient air is oil spray. There is a film of oil always present in the intake track which will be pressurized when that BOV opens. Just a picky point ...
RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8
Old 04-10-2010, 07:42 AM
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