| (High vacuum) + a moderate amount of boost (10psi or less)/cylinder pressure is healthy practice to aide in seating the rings. 4,000+miles on my motor since January,2012, compression test shows high compression #'s, and zero measurable differences on the gauge from cylinder to cylinder. I am very pleased with the equal #'s on all 6. My previous motor was softly broken in, and my compression numbers were much lower across the board, and had 2psi variances on average. :( Hard break-in practices is the way to go despite modern tolerances IMHO (if you use moderation and good sense). Here is a pic of my compression #'s after just 1500 hard break-in miles, all 6 read the same perfectly:
~Mario D. --------->
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BIG single VG underway, stay tuned for the Massacre.... 
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My current favorite TT.net member quotes: Nice, it's all fun and games until the turbos kick in :) (n/m) - Chickan 14:13:32 02/03/12 -God forgive him, he does not know what he is saying.. (n/m) - CmyZ 22:37:30 04/26/12 -I've learned its never over. (n/m) - Drk93TT 15:53:51 04/27/12 (6)
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My Siggy: "People swapping insults and other wise-ass remarks on the internet are like two dogs barking at each other through a fence. They usually start wagging their tails when they come to an open gate".
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Hard break-in + high rpm deceleration in lower gears. - 
