Silhouette racing car

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Beneath Mickey Thompson's 1971 Mustang Funny Car body is a racing chassis that shares no commonality with the production vehicle. MickeyThompson1971dragster.jpg
Beneath Mickey Thompson's 1971 Mustang Funny Car body is a racing chassis that shares no commonality with the production vehicle.

A silhouette racing car is a race car which, although bearing a superficial resemblance to a production model, differs mechanically in fundamental ways. The purpose of silhouette cars is to provide a manufacturer with a tangible link to their consumer product offerings so as to derive maximum marketing benefit from their investment in the sport. They also provide spectators with familiar, identifiable car models.

Contents

The use of a special-purpose racing car chassis rather than modifying a production car offers a number of potential benefits for a competition, which vary in importance depending on the specific class. They may include:

Construction

Silhouette cars often employ radically different chassis construction techniques, such as tubular space frames or carbon-fibre tubs in place of regular monocoques, and many also have completely different drivetrain configurations than their road-going counterparts. The body shells themselves are generally made of lightweight materials such as fibreglass or carbon fibre, and often, few parts (or none at all) are shared between the race and road versions of the cars. These changes are aimed at improving the desirable characteristics of the vehicle, such as increasing the stiffness of the chassis [3] or the output of the engine. [4]

In some silhouette classes, for instance Australian TA2 racing, the underlying chassis is the same for all cars in the series, with multiple body styles resembling different road cars available to fit the chassis.

Silhouette racing series

Entire championship fields can consist of silhouettes. Sometimes, only a single class in a multi-class field may permit silhouettes. Notable racing classes where silhouette cars have been used include Trans-Am, NASCAR, Stock Car Brasil, Group 5, Group B, DTM, JGTC/Super GT, monster trucks and the Australian Supercars Championship.

Due to homologation rules (e.g. Group B rally cars), some silhouette racing cars, such as the Lancia 037 and Lancia Delta S4, also end up being sold as road cars.

2014 DTM HockenheimringII Christian Vietoris by 2eight 8SC4949.jpg
Mercedes-AMG C-Coupé DTM, as seen at Hockenheimring Race II 2014
Mercedes-Benz C 63 AMG Coupe (C 204) - Frontansicht, 26. Februar 2012, Wulfrath.jpg
Mercedes-Benz C 63 AMG Coupé, the road car the C-Coupe AMG DTM was based on


Goodwood2007-199 Lancia 037.jpg
Lancia 037 rally car, based on the road-going Lancia Montecarlo


Ford Mustang - Mondial de l'Automobile de Paris 2014 - 018.jpg
A road-going Ford Mustang VI


Mercedes SLK Silhouette.jpg
A Mercedes SLK in a saloon car race
Mercedes SLK 200 Kompressor (R171) front 20100402.jpg
A road-going Mercedes SLK

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References

  1. "Brave new world: V8 Supercars Car of the Future". Red Bull. 2016-08-02. Retrieved 2024-10-17.
  2. Chapman, Simon (2021-06-10). "Gen3's long-term cost cutting measures detailed". Speedcafe.com. Retrieved 2025-01-10.
  3. GM Racing Technology Archived 2010-01-13 at the Wayback Machine
  4. DTM technical specifications Archived 2008-10-11 at the Wayback Machine