Quote:
Originally Posted by I am Earl
Its called common sense.
We are not talking about a F1 engine here. There is only so much a standard production line 3 series engine from 4 years ago will do. The original engine was already outputting 300 hp using a turbo, we are 40% past that with an even bigger turbo(s). The current car could do 650hp with a supercharger, forget about those numbers with the new one unless you rebuild the entire engine.
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The original engine (assuming you mean N55) made 300hp with 0,5bar boost. Hardly any boost at all. Under ideal conditions a boost of 0,5bar increases power by 50%. In the real world a bit less. So the base N55 engine makes somewhere around 220hp unboosted. A VERY mildly tuned 3l engine from BMW the N55.
A Nissan GT-R can be tuned to 650hp on stock turbos:
http://aamcompetition.com/i-11658595...r-package.html
Why is the S55 not capable of at least half of the gain (100hp) the GT-R has on stock turbos?