Quote:
Originally Posted by Leg
Utter rubbish. 
Wheels. Power. Hows that then Einstein? What, the wheels have upset the engine and it only produces 350bhp now? Duh. |
Have you ever driven the same car with an 18" to 19" wheel change? Maybee then you'd get your head on straight instead of making baseless comments like this. There is a reasonable performance loss with a move from 18" to 19" not because the engine doesn't produce enough power but because the drivetrain power has to motivate a much larger mass at each of the 4 wheels (the center of the mass is displaced outward by alot when moving any size up in wheels). Its basic physics. Its one of the reasons you see F1 cars with tiny (forged lightweight) wheels and big fat tires.
This is an effect you can easily feel and notice. Ever wonder why all the BMW test mules always use small wheels too? Because they are performance tuning it. They only move to large wheels at the end of test cycle because they want to run the car with the wheels that will go on sale.
Anyone with an e-pinion that this effect is small and negligible should simple find a friend with a BMW and do a wheel swap from 19" to 18" one day and see for yourself. The move from 19" to 17" is like a slap in the face, but thats too small of a wheel for an E90/E92
And no matter what your opinion is, theres no need to jump down the man's throat, grow up!