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Originally Posted by uspspro
Some quick math...
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The potential tuneability of the NA engine worries me. Coming from the turbo world, there's lots of headroom available through breathing modifications (external to the engine strictly) before one moves into more expensive modifications that provide less return.
The problem will be keeping torque on the low-end while still having usable top-end. I redline on the street all day long, but those spurts of top-end don't last very long. Getting more meat into the middle of this engine is the goal, but I don't see that happening without changing cams and doing some DAVCS/other tuning trickery. With a turbo it's rather simple; I will admit I'm ignorant of N/A tuning.