RC:
With the titan impellers, the boost pressure is available much earlier (they spool up faster), thus you could say that the turbo lag is reduced and throttle response would be better too.
However: Is this really necessary to achieve an additional 50 hp only? With larger "conventional" turbo chargers, a modified motronic software and some adaptations to the exhaust/headers, 50 hp or even more power should have been possible without major issues. So why use the "titan" turbo chargers? To prove to the customer that he really gets something for the additional money? Maybe but it still sounds weird.
Compromise between power|response|arranging|thermal management?
If you put larger turbos you get more power but more lag too...
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