Difference Between Coilovers & Cut Springs

Lowering a car with cut springs or coilovers makes it look sportier.

Many drivers try to improve their car's handling and appearance by cutting the springs beneath the suspension. This isn't without its risks, however, and often produces the opposite of the desired performance. Coilovers--consisting of a lower spring and a sleeve and collar that fit over the strut--cost more but deliver on performance.

Features

Both coilovers and cut springs lower a car closer to the ground. Coilovers and cut springs are both shorter than stock springs, although coilovers are also adjustable. The lowering springs in coilover kits have a higher spring constant, or a shorter distance to travel in response to equivalent force applied, while cutting springs does not noticeably change their spring constant.

Benefits

Cutting springs is a much cheaper way to give a car a sportier look, with cleaner lines and a smaller tire gap. Coilovers, however, can adjust to any road conditions and by threading onto the struts remain secure under extreme use. A coilover's high spring constant offers greater control and easier maneuverability of the vehicle than stock or cut springs, producing a smoother and less bouncy ride.

Drawbacks

Lowering a car increases the possibility of bottoming out by decreasing the distance the suspension has to travel before that occurs. Cut springs don't fit properly into their retainers, poorly distributing weight and potentially popping out while in motion. Cutting springs also produces a bumpier ride, reduces handling and voids most manufacturer warranties.

References

• Stance Is Everything: Cut Springs -- It's All About How It Sits
• Craig's Website At Backfire.ca: Cutting Springs