[Neema]

We all know about the Power button in the M5 and M6 that can engage either the full 507hp when activated, or just limit the engine to 400hp when not activated.

So my question is, what is actually happening technologically and mechanically that is able to limit so much power in a naturally aspirated engine. How do you electronically control horse power, especially in a naturally aspirated car that doesn't give you options like boost/turbos to play with? I would understand it if we had such a button in the 335 because I could see where the power was coming from. Things like limiting boost, fuel, and air.....but what about in an N/A car?

What is the engine/car doing to limit itself down to 400hp and then make a whopping leap to 500hp? We're talking about an extra 100hp. So what is it? VANOS? Limiting fuel/air ratios? Or what?

Does this question make sense?