This is the final installment in a series of articles on building race cars. It is about what is inside and where so many toggle switches and buttons come from. This article will be a lot of sporty beautiful salons of fast racing cars.

Previous parts about building racing cars were here







Today's topic about the interior and electrics largely overlaps with the topic of security systems PART 1 and PART 2 Because part of the interior is occupied and equipped for the installation of a roll cage, seat belts, etc.

The amount of wiring and, in general, trim parts in a racing car is less than in a civilian. Many interior parts, blocks and entire systems are removed. I will list just a few of them:

• Ignition

lock • Steering locks and other protective systems such as immobilizers

• Audio system and its components

• Central locks

• Most racing cars do not have an air conditioner, as this is a lot of extra weight

• Polycarbonate windows do not imply power windows, therefore, on most there are no cars either

• Electric mirrors (they are sometimes replaced with small mirrors to reduce air resistance)

• There are no ABS, ISP and other systems that help to drive and their components.

• Naturally removed rear seats, upholstery, carpets

• The front door trims are replaced with light ones (for some reason they are called door cards)

The front panel itself is either facilitated by cutting off a lot of pieces, or is specially made from a light and strong material such as plastic.


cut off here

The frame pipes pass through it in the area of ​​the windshield struts, to the front of the car under the hood. The panel is covered with a non-reflective material. It is applied by spraying. The process is called flocking. The panel becomes like black velvet)



The frame in the area of ​​the windshield is also pasted over with a non-glare black film or these places are painted black. Race cars often don't have sun visors, so the less glare and sun the better.


marked with arrows

The floors are covered with special overlays made of Kevlar, paste or aluminum. For the navigator, foot rest is made. For the pilot, a support for the left leg.


here in conjunction with the floor pedal unit from the previous part

In some classes it is allowed to land the pilot back. Then all controls and seats are displaced, the steering shaft is lengthened. For example, such alterations in the cars of the World Rally Championship. They sit 20-30 centimeters further.


marked in red


I didn't celebrate here as it can be seen with the naked eye

If the gearbox is sequential, then, as a rule, the lever is either long on the floor


Sequencer lever

or a small handle closer to the steering wheel,


sequencer lever

They are also found on the petals, but this is not allowed everywhere. There is one and it works back and forth, and there are two.


Subaru Impreza WRC 2000s, those ancient times when cars were 2.0 evil

The handbrake handle is a little further from the steering wheel. Most often, vertical ones are used, because a hand falls on them faster from the steering wheel or gearbox.


hydraulic hand

Brake and fuel lines run through the passenger compartment to protect against damage from the outside by stones and other blows. The hydraulic cylinder or cylinders are located between the seats.


In some four-wheel drive cars, there is also a hydraulic cylinder from the handbrake handle to turn off the differential, for the duration of the handbrake.

The instrument panel can be performed either with one screen on which there are many functions,


everything you need for the pilot including shift light is there

or in low-budget cars, they specially make their own home-made shields from various devices and lamps. It happens that the native shield remains.

When working with a sequential checkpoint, there is a separate display with a transmission number or combined with a multifunctional information screen.


only transmission board combined with shift light


, the electrics, the dashboard were also remodeled recently, and the excess was removed. It turned out like this.


not WRC, of ​​course, but also beautiful in racing, I can't wait for the first tests to try

It's time to move on to the toggle switches and buttons.

On civilian cars, many things are on the steering column switches, on the front panel in different places there are button blocks and on the center console with touchscreens.

In racing cars, paddle shifters are often removed. All functions are transferred to toggle switches and buttons located in the pilot's or navigator's accessibility on the center console. No touchscreens as the pilots wear gloves and vibrations. It is important to note that while driving on the race track, the pilot or crew is tightly pulled and strapped to the seats and all vital controls and buttons must be accessible without releasing.


In rallies, sometimes buttons appear at the feet of the navigator, such as a beep or forced shutdown of the fan to drive through the fords.


marked in red

The navigator pushes them with his feet without unfastening or distracting from the transcript.

Of course, there are buttons on the steering wheel, in circuit races where you can there are a lot of them, the main example of course is formula one, where the steering wheel costs a lot of money and it is like the main control panel of a car-computer.


rally folk here

In addition to some "household" things such as ignition, washer, cleaner and light on toggle switches, naturally and purely racing instruments. For example anti-lag, launch, engine control modes, cooling fans, etc.


the toggle switches click nicely) and are simply determined by touch

Over time, some toggle switches go to multi-button control panels with screens


marked with an arrow

As I wrote above, many systems are removed, but a lot of additional equipment appears.

Such devices as for example:

• Data logging system (telemetry)

• Communication with the boxes

• Intercom between the pilot and the navigator (intercom)

• Navigation equipment (in rally raids this is very important)

• Systems provided by the organizer for tracking crews

And others

And of course, all this must be very reliable, therefore, on expensive cars, special connectors are even used to connect harnesses.


made a collage

There are no trifles in motorsport, they work on every detail. Reliability is the key to wiring. Low weight would also be useful. All control units, relay and fuse boxes are transferred to the passenger compartment to protect against dust, water and dirt. All interior panels, trim remaining inside are very light.

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