Here is a wake-up call for wanna-be racers. From my experience, the typical driver tries to leave the stoplight in a race under full power, with the tires spinning in a cloud of smoke. ON THE OTHER HAND, at full power the X5 AWD will turn the tires over maybe once before all the power is solidly put to the pavement (because of the vanos system and the fact that the SC really only works above 3000RPM). In some 40 years of racing, I can only remember maybe a total of three times when the opposition didn't break the tires loose and waste HP (on the street...not at the track).

While we have to be realistic in understanding that a 4,800 pound vehicle with a 500 HP motor has its limitations... you still must consider that the average street racer has little understanding of how a race is won.

ps. the BMW guys...just like the mustang guys...have figured out how to change the pulleys on the Superchargers/ use and improve the intercooling to get things cooking.

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2008 BMW 335I Blue Convert - still in break-in!
2003 BMW Silver M5 W/ 4.11 gears, Cust Exhaust, Software.
2002 BMW Silver X5 4.6i W/ G-Power Custom headers and SS exhaust, Dinan Throtte Body, S3 Software, Super Charger, 4.11 KMS Posi gears, Custom intercooler, Turbo controller.
2000 Yamaha White Road Star Anniversary Full Dress #322
1999 BMW 528i
1990 Mercedes 300E
1989 BMW 325i
1978 Kawasaki 650 Street Racer