1500cc, 100hp@6500rpm!?!

[kleinporsche]

I just bought the RS magazine (porsche dedicated) of august 2005, an on an article about the 550 spyder, they were saying that with a 1498cc engine, they were able to produce 100 hp!!!! while stock 1600cc VW engine produce 57hp. The question is: HOW DID THEY DO IT (without enlarging the engine size)!? I mean, knowing that, what kind of HP can I expect with a 1835cc with such high RPM? This is a good question and it needs reflexion...