Welded combustion chambers?

derrangedgadgeteer said

i'd also wonder, if that "Pocket" next to the plug would be entirely necessary if I got rid of the plug-side dead space it was meant to help ignite. I likewise would wonder if the flame would propagate better with or without it in a closed configuration. I don't recall seeing any aftermarket offerings that have it... :read:

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It's been well understood for a few decades that the combustion process gets completed faster with a closed chamber.... and that is another aid in avoiding detonation tendencies. As far as the oval shaped 'pocket', that is an interesting observation. You might want to read up on a topic called 'spark kernal'.

You ought to read up on this thread to get a bit of appreciation on how valve shrouding can hurt flow... some of it can't be avoided with a close chamber but at least you'll know not to crowd the valves too closely.
Intro to a port job