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The Porsche hits power peak at 8250 which is quite high. Porsche can afford to do that since their 2 cam profile setup lets them not sacrifice low end torque, just as Honda was able to push the power peak to 8300 or something on the F20C. On the FA20, they only have one set of cam lobes, so the higher they push the power peak the less low end torque they have. I'm not familiar with how much duration you add to the intake for more rpm, but I imagine that you won't be seeing 200Nm until something like 3500rpm, where you can get 200Nm at 3000rpm on the current FA20.
You don't need titanium bits to hit 8500, it just makes it easier but more costly. However making a 7400rpm engine go to 8500 probably requires a lot of changes.
Of course the 1LR-GUE manages slightly better low end torque despite its sky high 9500rpm rev limit, but they have a 3 stage variable intake to help patch the torque.
A lot of people won't like this idea but a mild hybrid system could boost the low end torque an incredible amount, perhaps even have the max torque peak in the 1000s.
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