However, cutting the springs will place more strain on the dampers, not to mention you will likely bottom out the shocks, due to lower ride height and less strong springs, so the dampers will probably fail prematurely.
Not Helpful 14 Helpful If the rear springs are cut and the back were not, will that give the front a rough ride? No it won't, but it will make the car's control uneven due to the ride height. Not Helpful 3 Helpful 3. No, only straight springs can be cut. Pigtail ends are smaller than the cut end would be. The larger diameter would not locate properly in the seating. Not Helpful 0 Helpful 0. Include your email address to get a message when this question is answered. By using this service, some information may be shared with YouTube.
After lowering your car, it is recommended that you take it to a reputable shop to have a full alignment done to avoid experiencing abnormal tire wear. Helpful 59 Not Helpful If you are cutting coil springs to lower a car, ensure that you are working with the proper type of coil spring.
A coil spring with tangential ends is the only type of coil spring that may safely be cut to lower a car. Do not cut a coil spring with square ends or pigtail ends. Helpful 63 Not Helpful Be sure that all cuts of a coil spring are exact measurements. Uneven cuts may make a vehicle sit unevenly. Helpful 35 Not Helpful Helpful 37 Not Helpful Lowering a car with a new coil spring will result in a smoother ride and increased ease in handling the car.
Helpful 28 Not Helpful Do not use a torch to cut coil springs. The heat from a torch will damage the springs.
Helpful 40 Not Helpful 2. Related wikiHows How to. How to. Co-authors: Updated: August 5, Categories: Tires and Suspension. Thanks to all authors for creating a page that has been read , times. Did this article help you? Cookies make wikiHow better. By continuing to use our site, you agree to our cookie policy. About This Article.
You Might Also Like How to. Where k is the spring constant, d is the diameter of the coil wire, G is Young's Modulus of the material, D is the diameter of the coil, and N is the number of coils in the spring. I'll spare you all the math that follows, but the main point is that springs have already been modeled mathematically, and there shouldn't be much debate over what happens to the spring rate when you cut springs. Below is the chart that resulted. The blue data is from springs that exist on the market.
This shows that generally, you want an asymptotically stiffer spring as ride height drops. This makes sense, because if your suspension is bottomed out, there is no upward travel left and you would need an infinitely stiff spring to keep the suspension from compressing any more.
The red data points are theoretical spring rates that you would get from cutting the factory spring. What this tells us that cutting springs drops the ride height and stiffens the spring, but the stiffening effect is not as much as typically is desired.
You can get some acceptable results with a mild cut, but as the cut gets more aggressive, the stiffness becomes further and further from ideal. If the springs are cut excessively, the spring coils can bottom out on themselves.
This is called coil binding and is bad in a number of ways. First, when the spring bottoms out, the spring rate suddenly shoots way up, leading to unpredictable handling dynamics and severe impact loading to the chassis and control arms. Secondly, the spring coils are grinding against themselves and will destroy themselves over time.
Using a plasma cutter or oxyacetylene torch to cut springs will destroy the temper of the metal and will make the spring too soft. You also shouldn't cut progressive springs or springs with square ends.
Said another way, you shouldn't cut your springs unless they are perfectly helical. The system will become underdamped. The suspension will bounce up and down, which is bad for traction and bad for comfort.
This is true for any aggressive spring that is not paired with an appropriately aggressive shock. Because Square ends and Pigtail ends are designed to make full contact with their mounting points, they would have to be re-shaped after they were cut. It only takes degrees F to start annealing spring steel.
You, the spring owner, can not do anything to make a soft spring hard again. A heated spring is a ruined spring. OK, your springs have tangential ends, you found a hacksaw and some safety goggles. Now the fun part. The first thing you need to know is that cutting a coil spring will not only lower the vehicle, but it will also stiffen the spring making the ride and handling a bit firmer.
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