However existing base or comp are hp underrated from a real world dyno perspective, the new +15hp version most likely would have 0.1 bar or 1.4psi more in peak.
The concern is that sometimes the peak hp is not the full story. Back in F8X, the comp is 20hp more than base, supported by holding 2psi more only above 5k RPM. The CS, with a claimed 10hp more than comp, was significantly quicker, faster and more responsive at full rev range, due to a different pre throttle boost strategy and middle range torque (again, not just middle range peak torque).
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Lemania 2320
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