i was browsing around this Neuspeed catalog that i had and thought some of the information would be useful to those who don't already know much about understeer, oversteer, etc. -hopefully this will be valuable information if someone had to do a search or something.

HANDLING ADJUSTMENT
With a clear understanding of what you want from your car in terms of handling, tuning your suspension becomes much easier. The following information will help you to understand just what changes are possible, and how they affect handling.

UNDERSTEER is a tendency for the car to slide off a corner nose first. You turn the wheel, but the car doesn't respond... it turns less than you want - hence the term understeer. In circle track racing it's called pushing. Most new cars are set up to understeer, because it's relatively safe handling for most drivers. But if you want to go fast, you want to tune your car to neutral driving.

OVERSTEER is the tendency for the tail end of the car to slide off the corner first. The rear of the car is steering more than the driver - hence the term oversteer. It can be the fastest way around a corner, but it can be dangerous. Most front wheel drive cars don't oversteer unless modified, or when the throttle is lifted suddenly in a corner.

WHEEL ALIGNMENT is a careful adjustment of camber (tilt) of the wheels and toe (angle in and out). A good alignment can make your car handle better and safer. Your factory alignment specs are a good starting point, but you may want to run more front camber - about 1 degree negative and 1/16-inch toe out for improved handling.

WHEEL OFFSET is the distance from the mounting surface of the wheel to the centerline of the wheel. Offset, is usually measured in millimeters (mm). A low number moves the rim/tire toward the outside of the car, a higher number moves the rim/tire inside of the car. Most aftermarket wheels have the offset cast into the rim. You must be careful in choosing a rim for your particular car, since the tire can rub on the fender one way and the suspension the other way. Remember, bigger isn't necessarily better, particularly if it rubs over every bump. When buying tires and wheels, find an outfit that has good knowledge of your particular make and model, and will stand by their suggestions, and offer a money back guarantee for wheels and tires that do not fit.

 

ADJUSTMENT = TO INCREASE UNDERSTEER / TO INCREASE OVERSTEER
Front Tire Pressure = Lower / Higher
Rear Tire Pressure = Higher / Lower
Front Tire Section = Small / Larger
Rear Tire Section = Larger / Smaller
Front Wheel Camber= More Positive / More Negative
Rear Wheel Camber= More Negative / More Positive
Front Springs= Stiffer / Softer
Rear Springs= Softer / Stiffer
Front Anti-Roll Bar= Thicker (stiffer) / Thinner (weaker)
Rear Anti-Roll Bar= Thinner (weaker) / Thicker (stiffer)
Weight Distribution= More Forward / More Rearward

now a few people can understand why some buy only the rear Suspension Techniques sway bar (for example).