Screw Suspension. Features, installation, configuration

One of the simplest versions of sports tuning is the modernization of the suspension. This allows for a relatively small price to significantly change the behavior of the car. The best variants of the chassis parts, which have the greatest efficiency, include screw pendants.

Definition

This part is a design that combines a spring and a shock absorber. Also it is called a coilover and adjustable suspension.

Types

There are two ways to install these parts.

Only thread and helical spring can be replaced. Suspension in this case may be ineffective due to the discrepancy of the original shock absorber to new parts. That is, even the deterioration of the car's behavior is possible.

Therefore, it is recommended to change the rack. This involves the installation of a spring and shock absorber, combined in a one-piece design. Their parameters are calculated by the manufacturer, therefore such screw suspensions give the best results.

Advantages

The main advantage of such parts, because of which they are replaced by standard suspension, consider the extensive adjustment possibilities. This allows you to select the optimal individual settings. Moreover, changing the parameters is quite simple for the average user, and for this purpose, enough handy tools.

In addition, screw suspension is very simple to install, so this operation can be performed independently.

disadvantages

Pendants of this type are more difficult to operate than conventional ones. This is due primarily to the need for competent tuning to achieve good results. This is associated with most of the negative operating moments, as improper adjustment of the parameters can lead to a significant deterioration in the behavior of the car. However, for daily operation, it is sufficient to adjust the suspension once, and the need for constant adjustment only arises in sports to achieve good results under different conditions. In addition, you can use the services of a specialist for customization or learn it yourself.

In addition, note the vulnerability of the threaded joint, especially to the effects of reagents. To prevent the nut from sticking to the thread, it is sufficient to use rack covers or lubricants.

Application

As you can see from the above, screw pendants are used to fine tune the car in order to improve handling. Naturally, this is relevant for tuning, aimed at increasing the speed characteristics. So, the screw suspension of VAZ is very popular, as in the runoff these cars have poor controllability, and their tuning is inexpensive, therefore it is widely distributed.

In addition, such details are used for sports cars in order to improve their performance in order to achieve even better results. Therefore, BMW screw suspension is common, especially for older models, as well as for Japanese sports cars.

Cost

The price of the parts in question varies in a wide range, depending on the complexity and the manufacturer. So, the cost of simple models starts from about 20,000 rubles. These include, for example, a screw suspension Ta Technix. At the same time, the price of the most advanced version of HKS is more than 270,000 rubles.

Installation

Install the screw suspension is easy with their own hands. No specialized equipment is required for this. A fairly small list of simple tools, including a set of heads and keys of the appropriate diameter, polyhedra and sprockets, lubricants, two jacks (preferably hydraulic).

It is preliminary recommended to study the instructions of the machine to find out the location of the fastening bolts. Moreover, there, most likely, the technology of change of shock-absorbers is specified.

You should start working with the rear suspension.

• The car should be installed on a flat surface.

• Then remove the wheel, after raising the car.

• Then, together with the reserve, they put it under the car and lower it.

• After supporting the beam with a jack, unscrew the bolts.

• The shock absorber is removed.

• After dismantling both shock absorbers, the beam can be lowered.

• The shims of the shock absorbers must be replaced if they are worn out.

• Before installation, new shock absorbers must be pumped.

• It is also necessary to adjust their rigidity, since there will be no access to the adjustment mechanism after installation.

• Further, the upper supports are attached to the new shock absorbers.

• They are bolted to the body bolts.

• Springs replace.

• Then the car is lifted by jacks before it hits the bolt hole of the shock absorber.

• After that, the bolts are tightened and the jacks are removed.

During the installation, it is necessary to lubricate the thread, and also tighten the lock nut.

The technology of replacing front shock absorbers is the same. Only you need to consider that the bolts are located under the hood.

Settings

To adjust the parameters of the suspension can start immediately after installation. This is done by screws.

The number of variable characteristics varies for different variants. So, in some suspension brackets simultaneous adjustment of a road gleam and preload of springs is provided, that allows to change height of the car above a road and rigidity of a suspension bracket. However, you can not configure these features separately. The most advanced models have several tens of stiffness positions, as well as adjustment of other parameters such as retreat, compression, camber and castor, each characteristic being changed separately.

Many screw suspensions have preload adjustments for springs, camber, ride height, castor.

To adjust the first parameter, if the spring is installed separately, there are two nuts (locknut and spring-spring) on the cup or stand.

Adjust the ride height with two nuts at the bottom of the rack. Having weakened a counternut, it change, without affecting rigidity of shock-absorbers.

To change the camber and castor, twist the spring cup and bearing.