We've been trying different things with the 9100 series. I have a pair of 10's in a ported box for SQL and I hit 142 until my deck starts skipping.
We also have a G37 with two 12's in a sealed box doing really well in IASCA SQ.
As for the 3512's, we use those to grind out mid 140's.
If you look on the soundpressure.com forum, I'm sure they'll have an answer for you.

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142db in an SQ Sentra.