Thick gaskets and the OC

I think this is the most appropriate spot in this epic thread (thanks George! Fun reading ) for me to throw in my thoughts/limited knowledge.

Alright, so my experience with OC heads is somewhat unorthodox and might not be appropriate to the conversation, but perhaps it means something.
My motor is a .030 over, 2V OC headed, turbo-fed torque machine. I used 0.072" copper head gaskets(no o-ring.. just copper spray RTV!). The block was zero decked, so I have 0.072 piston-head clearance. The heads I used were also milled, but I don't know how much - never measured the volume. I used the gaskets to decrease the static comp ratio. My guess is it is somewhere in the 8.75:1 range. It could be much higher, depending on whether they were decked for flatness or for compression ratio. They did have double springs installed when I got them.
The cam is a small hydro, wide LSA cam with a slight exhaust bias. http://www.summitracing.com/parts/SUM-5201/

I run ~9psi, with a rather small turbo (67mm with a .81A/R turbine housing on a Q-trim wheel), no intercooling. It spools hard, 9psi by 2500rpm or so. Even with the wide LSA, boosted, "detonation-prone" heads, I have not had any hint of detonation - I've even run 89 octane through it without issue.

So I think I'm in George's camp on this one, the closed chambers were done mostly for increased compression, not detonation resistance. I wonder if the slightly better flow of the OC head due to less shrouding would offset any increased compression allowed by the quench?

Examples of other OC headed motors? Well, for one, pretty much any modern engine. While most have some amount of quench pad, nothing comes close to the massive quench pad of the cleveland closed chamber. Look at the LS motors, the ford modular motors, that previously-mentioned Chrysler 5.7 Hemi head.
Ford 4.6 4v:

Chrysler 5.7 "hemi" (interesting that the quench pad is not flush with the deck surface...pistons are flat-tops as well)


Honda K-series:


I know most of you aren't up on your 4-cyl imports, but those Honda heads are pretty impressive. Some versions run 11.7:1 compression and top out at 8700rpm, making 100hp/L naturally aspirated.