Alfa Romeo klub Srbija

4.4 Suspension

4.4.1) Type :
The generic type must remain the same as the homologated car.

Anti-roll bars, fitted to the homologated car, may be removed. Mechanically adjustable anti-roll bars are permitted and these may be adjusted from the cockpit.

The bars, their levers and linkages may pass through the luggage compartment, engine bay and wheel arches but only the adjustment cables or rods may pass through the cockpit.

The removal or the addition of anti-roll bars must not change the generic type of suspension. The competitor must submit to the FIA a scheme and explanation of the operating principle and design layout of the racing suspension showing that the generic type is respected, and receive written approval. All existing suspensions raced prior to 01.01.97 must be submitted through the ASN for automatic approval.

4.4.2) Pivot points :
The inboard points of all linkages, McPherson strut mounting points and spring and/or damper mounting points must lie within a sphere of radius :
20 mm for all points below the upper line of the wheel rim
75 mm for all points above the upper line of the wheel rim

With its centre at the original equivalent point of the homologated car's suspension.

If the inboard pivot is a bearing of finite length, the pivot point is defined as the centre of the bearing element about which the link rotates.

The length / diameter ratio of an inboard suspension joint must not be greater than 2 or than that of the joint of the series homologated car, if this is greater than 2.

The length of the joint is defined as the length of the rolling element or the shortest sliding element.

The diameter is defined as the mean diameter of the rolling element or the maximum diameter of the sliding surface.

The position of the wheel rim relative to the body shell (or chassis) is as per the homologated car, when at its unladen static height.

Modifications to the shell (or chassis), to accommodate the changed position of pivot and mounting points, are limited to that necessary to provide clearance for suspension components, drive shafts, and wheel and tyre.

The type and material of suspension joints are free.

4.4.3) Materials :
The materials from which the suspension components are made, and their design, within the limitations of art. 4.4.1., is free, except that composite materials are not permitted.

4.4.4) Reinforcement :
Strengthening of the mounting points, suspension parts, and running gear is allowed.

Reinforcing bars on the suspension mounting points of the body shell (or chassis) may be installed as follows : the distance between the suspension attachment point and the attachment point of the reinforcing bar must not exceed 100 mm, unless the bar is a transverse, tensile/compression member homologated with the rollcage, or unless there is an upper bar attached to the top mounting of a strut suspension. In the latter case, the maximum distance between the attachment point of the reinforcement bar and the upper articulation point of the strut must not exceed 150 mm. The attachment points at not more than 100 mm/150 mm are the only points on or within the car to which the reinforcing bars are to be fixed.

4.4.5) Active systems :
Active systems that control any part or characteristic of the suspension or steering are not permitted, except power steering systems, as defined in art. 4.7.

4.4.6) Springs :
The front and rear spring types (coil, torsion bar, rubber, pneumatic, etc.), must retain the same principle as the respective spring types on the homologated car.The number of springs is free, provided that they can be fitted without any modifications other than those specified in these regulations. Combined coil spring/shock absorber units are permissible and may be used in conjunction with the original spring type subject to art. 4.4.7.

The material and main spring dimensions are free.

The spring seats may be made adjustable and include the addition of material.

4.4.7) Shock absorbers :
The number of shock absorbers fitted to each wheel suspension must be the same as the homologated car.

The make and type are free.

It is permissible to replace the strut, including spring seats, of a strut type suspension with another make or type but this must not result in a change of working principle.

4.4.8) Adjustment of springs and/or shock absorbers :
The adjustment of springs and/or shock absorbers from inside the car is not permitted.

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