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Wow, I see how they built it just for the high RPM operation. I'm sure plasma coating of cylinder bore is common on Nissan, Ford, etc now. I think even the FB20 has it (not sure).
So, crank (for additional power, possible vibes), bearings, springs, light valves, light + strong + long rod, light + coated + small pistons, light wrist pin, upgraded lubrication, stronger bearings, high volume breathing tuning, etc are the key to higher RPM operations. (nothing crazy like Formula 1 V8 making 800 HP)
100 HP per liter FA20 makes is pretty good, but somehow I think it can do better since old 7th gen Celica and Acura RS-X also made as much with less CR and no direct injections.
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3x 240SX, RX-8 Sport, Sentra Spec V, A4 1.8T Quattro, Miata NB2, Miata NC 2.5
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