Open Chamber Heads vs Closed Chamber Heads....

Most /all of you guys are talking WOT situations.

But a streeter spends most of it's life at Part Throttle and modest Rpms.
Even on the run to 65mph; with 3.23s, yur looking at just 3780@ zero-slip in second gear (Tflight), perhaps 4200@ 10%@slip.
How can tight-Q and less surface area affect these, when coupled with high compression?

I mean the compression ratio by itself brings very little to the table; many articles have suggested just 5.2% peak WOT-power gain , when going from 8/1 to 11/1.
And we know that when throttled, as in cruising, The effective compression ratio could be sub 5/1. So how does Tight-Q and Hi DCR, and small surface area, make such a funtastic street-engine?

Ok I'll tell you what I think.
Just one aspect.
On an 8/1 360 the total chamber size has to be 105.35cc.
On an 11/1 the total is 73.74
Ok; have you ever had a big fluid-transfer suction device, that you were using to suck the oil out of one jug, to put into another. And it had a big old air bubble trapped in it? Remember how spongy it felt ? You ripped on the handle, but the device only filled half way. After a couple of cycles you probably realized that this was not very efficient, and so, you bled the bubble out. On the next pull, the device filled right up.
Back to the engines. Imagine the piston falling on the intake stroke; one with 105cc of air already in it, and the other with just 74cc. At low rpm/low throttle openings, who cares, if you need more power, you just open the throttle a wee bit more. But when you whack it open, with your tires stuck to the road and the rpm at 3500, You want as much air to find it's way into the cylinder as possible, I ain't got no time for the big-azz 41% more cc chambers to decide to get moving. And then to compress a less dense mixture to only 8/1. No I want the denser charge to be compressed to 11/1 , and to arrive at the rear tires to set them on fire!
But That's just what I think,lol.
BTW, that's also why I run plasma Moly rings. Some guys think power is all about rpm and big cams and such. But I gotta say, if the cylinder is lazy, and only pulls in a fraction of the air that it should , and then compresses it to only a fraction of what it could, well, that's a double crippling whammy, so then well,yeah, band-aid it up with a hi-stall and semi-race gears.
But I'm no engine builder, so I just have opinions.
Somebody else can talk about squish and surface area.