Some racing terms you may need to become familiar with...

[Rich Z]

Quote found on another site:

Understeer is when you hit the wall with the front of the car. Oversteer is when you hit the wall with the rear of the car. Horsepower is how fast you hit the wall. Torque is how far you take the wall with you. Spoilers and bodykits are how much of the wall you take with you. Rollcages and windownets are how much of a mess you leave on the wall.

[Mark Dalton]

Sounds like NASCAR has it's own set of definitions.