Quick update. I finally checked the vacuum with the car fully warmed up. As JFP advised, it’s just like the cam variance - only check it when the car is truly at operating temp after a good run. My new AOS is well in spec:
Done!
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Rgds, Fred
#317 550 Spyder Anniversary Edition 2004 Boxster S, 3.8L Flat Six Innovations engine, PSS9s, etc, etc . . .
The contents of my posts are for entertainment only. As confirmed by my many motor sports fails, I am not qualified to give product endorsements or mechanical advice 
Last edited by Oldcarguy; 04-29-2018 at 12:21 AM.
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