Chassis

Sprint Car Chassis

Sprint car chassis are designed to be lightweight, functional, and most importantly, SAFE! 
There is nothing bolted to the car that does not contribute in some way to going fast. Their short wheelbase makes them respond very quickly to driver input.
The UK Sprint Cars use genuine Sprint Car dirt chassis imported from the USA.
The Chassis is wrapped in fibreglass bodywork, and the 'pod' at the rear of the car contains the fuel cell.

Material: Chromoly Steel
Wheelbase: 83 - 93"

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Gear Box

Unlike the American Outlaws, the UK Sprint Cars use a gearbox with a hand clutch operated 1st gear which allows the cars to pull away under their own power, without the need for a push truck.
2nd gear, which is used for racing, is direct drive from engine to tyres.
Some cars are fitted with a reverse gear.

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Axles and Brakes

Axle

A Sprint Car uses a beam axle at the front, with left side steering link, and lightweight hubs and brakes on each wheel.
The Rear axle is a Winters Quick change, which allows a variety of gear ratio kits for different tracks. A single brake disc is fitted to the rear axle.


Weight

A Sprint Car only weighs approx 700kg complete, giving them a huge power to weight ratio. This makes them fast and agile.

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Driver

The driving position in a Sprint Car is different to most race cars. A Sprint Car cockpit is small, tight and there is a lot going on in there.
The racing seat is positioned very upright, with five point safety harness, and the steering wheel positioned relativley flat. Two pedals, brake and accelerator, one each side of the driveline which goes straight under the seat. On the dash, a variety of dials and adjustment systems for the driver to use during the race.
Fireproof racewear and helmet are worn by the driver. A Raceiver Radio is used for one way communication from race control to all drivers.

Sprint Cars

Sprint Car

The UK Sprint Cars are some of the fastest cars on the UK short ovals, with their iconic soundtrack from their V8 engines and intimidating presence on track, they will put on a show you will not forget easily.

Sprint Cars are one of the biggest race formula in the USA, racing on the ovals almost every night of the week. 'The World of Outlaws', often refered to as the greatest show on dirt, are the iconic image of Sprint Car racing with their 4 wide salute to the crowd before each feature final. On the larger high banked tracks, running fuel injected 410ci v8's these cars are some of the fastest on the ovals.

While the UK oval tracks are relatively short and flat, and most have an armco fence limiting the space for racing, the cars you see racing in the UK series are genuine cars imported from the USA.
The engines in the UK cars are smaller than the American Outlaws, at 360ci, but suit the tracks they race on in the UK. A starter motor and hand clutch to pull away under the cars own power are added, meaning there is no need for a push truck to get the cars started, making them easier to manage at race meetings in the UK. Other than that, the cars you see on track are genuine American Sprint Cars, many having raced on the iconic tracks such as Knoxville.

 

Racing

Sprint Car racing is fast, very fast! These open wheel, lightweight, V8 machines have too much power on a track with little space . . . and this can lead to some very tight non contact racing when every driver has their eyes set on victory.

All races start with a few 'warm up' laps, this allows drivers to check their cars are running right, raise tyre pressures, warm their brakes and adjust the wing position while getting used to the track surface ahead of the green flag.
A race meeting normally starts with two qualifying heats, with points scored in each. Drivers will start one race near the front of the grid and the other near the back, giving everyone a chance to race their way through the pack, and to defend from the front.
Following the heats, the points scored so far are added up, giving the grid for the Feature Final, with the highest scorer taking pole position.
Regardless of the points scored in the heats, it's victory in the Feature Final that the drivers really want, and it's this race that normally provides the action.
Some of the major championships are won in a winner takes it all Feature race, while others on the accumulation of points over a set amount of races.

Tracks

Coventry Stadium

Skegness Stadium

The Sprint Cars race anti-clockwise on oval tracks in the UK and Europe.

The tracks vary in length from 300 - 600 meters.
The tracks have varying amounts of banking, some tracks are flat, while others have high degrees of banking.

The Sprint Cars race on tarmac and dirt surfaces.


Sprint Cars

Engine

Engine

The UK Sprint Cars use Chevrolet Small Block engines with a maximum capacity of 360 cubic inches, running on pump gas.
These produce upwards of 400 horsepower, and large amounts of torque. In a car that does not weigh a lot, this makes for some serious speed!

Tyres

Sprint Car Tyres

Sprint Cars run on two surfaces, and have tyres for each, helping put the engines power onto the track.
When running on Asphalt surfaces, a slick racing tyre is used.
When running on dirt surfaces, a dirt treaded racing tyre is used.

The rear tyres on a Sprint Car are larger than the two fronts. But the outside rear is a lot bigger, and this puts stagger into the car, which helps the cars corner at speed. Stagger is adjusted with smaller and larger wheels on opposite sides of the car, but the larger wheel will always be on the right as the cars race anti-clockwise on oval tracks.

Wings

Aerofoils

Sprint cars have a lot of power, big tyres and not a lot of weight . . . so to push all that power down onto the track, Sprint Cars have two wings.
The 6 square foot nose wing directs the airflow around the car, and channels it towards the top wing.
The 25 square foot top wing provides the downforce at the rear of the car.
In America you can find Sprint cars that run with and without wings, and the aerofoils are often referred to as Aluminium courage.


Suspension

Torsion Bar

UK Sprint Cars use torsion bar suspension.
Each corner of the car has its own torsion bar, and the bars material stiffness and torsional resistance allows fine tuning for vehicle dynamics set up.
The torsion bars for each corner sit across the chassis horizontally. These are fixed on one end to act as a torsional rigid pivot point, while the other end is attached to the link arm.
On each corner of the car a link arm rests on the axle, this moves up and down in an arc around the end of the torsion bar with axle movement. This movement causes the torsion bar to twist, and its torsional resistance acts as a spring, giving the chassis suspension.

A damper is attached from the chassis to the axle, to dissipate the kinetic energy and soften or control the axle movement.



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