I had seen the bottom pdf before.... and that is what got me thinking...
the top link is very much what I'm thinking... (photo below from top link)
I've downloaded the 2ZR pdf... I can't capture all of that engine... it is completely different... direct injection, multi valve...
I am hoping that the 5MG chamber lends itself to a bit of modern development. I don't know what to expect(power wise), my client asked me for some headwork on his boosted 5MG, while doing research I saw chambers, and piston crowns that I believe can be improved. As has already been pointed out, my client MAY do better with other options(7M, 1J, or 2J)... but he is stubborn (ain't we all sometimes) and he wants to keep the 5MG. So... back to the purpose of this thread... if my client can get better combustion by reshaping the pistons and chambers, I was here asking if this is smoke and mirrors... or worthy of at least one mule... if my client is interested... and can be persuaded
"You never change things by fighting the existing reality. To change something, build a new model that makes the existing model obsolete."
--R. Buckminster Fuller