Stock Car Products - Stock Car, Circle Track And Oval Track Racing Parts, Components And  Accessories For Late Models, Hobby Stocks, Street Stocks, Mini Stocks, NASCAR, IMCA, ARCA

Stock Car Products - Stock Car, Circle Track And Oval Track Racing Parts, Components And  Accessories For Late Models, Hobby Stocks, Street Stocks, Mini Stocks, NASCAR, IMCA, ARCA

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Bilstein
Technical Info
Page 2

Why Race on Bilstein Shocks?

Because the valvings are consistent, your set-ups will be more precise. You will know what is on your car.

Bilstein's larger piston and deflective disc valving develops control force when you need it, at the slightest movement of the suspension. You'll get weight transfer when you need it, better control under braking and your tires will stay on the track through the rough spots.

Bilsteins do not fade. Your chassis will handle as good at the end of the race as it did at the start.

Bilsteins are rugged. They last for years and are rebuildable and revalvable.

When the advantages of Bilstein gas pressure shocks are tallied up, you will have spent less money on shock absorbers and collected more money at the pay window.

Bilstein's patented deflective disc valving system allows for exact valving of both compression and rebound movements.

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Answering the Racer's Questions

The following are some commonly asked questions and their corresponding answers concerning Bilstein gas pressure shocks:

Q. Why is the shaft on a Bilstein shock always extended?
A. As mono-tube gas shocks, Bilsteins are under gas pressure to deliver the most responsive valving for ultimate control. This pressure, called the gas reactive force, and Bilstein's perfect internal seals force the shaft to be extended.

Q. Is the car more difficult to scale with Bilsteins?
A. Bilstein shocks have no effect on the results as you weigh the four corners. The gas reactive force in Bilstein shocks may raise your car's ride height slightly. Simply adjust the chassis downward to the desired ride height.

Q. Does Bilstein offer specific applications for the various dirt and asphalt racing series?
A. As the set-up charts in the catalog indicate, Bilstein has shocks valved specifically for both dirt and asphalt surfaces of various track lengths.

Q. Are Bilstein difficult to understand and use?
A. After reviewing the various set-ups in this catalog, you'll be ready to select the proper shocks for your specific race car. Bilstein valving is precise. Once you purchase your Bilsteins you can be certain that they will perform at peak efficiency throughout their long life.

Q. I can buy twin-tube shocks for less money than Bilsteins. Why should I spend more the extra money
A. As we point out in this catalog, Bilstein shocks are fabricated from the highest quality components for long life performance. Typically Bilsteins are only slightly higher than twin-tube brands. Since they will far outlast conventional shocks, they cost much less over the long run. Bilstein shocks are the least expensive way to lower you lap times.

Q. The companies that sell only twin-tube (low pressure gas) shocks say their design outperforms mono-tube (high pressure gas) shocks. How can I know the truth?
A. Take a trip to a local discount department store that sells replacement shocks for cars and trucks that drive on the street. You'll find shocks priced from about $8.99 to $29.99. All of the shocks on display will be twin-tube shocks. Their price reflects the fact that twin-tube technology is relatively unsophisticated and very low cost to produce. At a new car dealership you'll find that low cost base line cars and trucks are factory equipped with twin-tube shocks that add little to the cost of the vehicle. On the other hand, Chevrolet Corvettes have been equipped from the factory with Bilstein gas pressure shocks since 1984. Factory installed Bilsteins can also be found on Mercedes Benz, Ferrari, Porsche, Chevrolet, z-71 trucks and many other high performance vehicles from around the world. World class automotive engineers wouldn't consider equipping any high performance vehicle with twin-tube shocks. Finally, take a stroll through the pit area at a NASCAR Winston Cup, Busch, Craftsman Truck, CART, IRL, IMSA, or Formula One race and you'll find not a twin-tube shock in sight! By searching out the facts, you will know the truth; and the truth will make you fast!

Shock Valving Nature

The amount of damping force produced by any shock absorber, twin-tube or mono-tube, is dependent upon the speed at which the shock's piston is traveling when the damping force is measured. Therefore, the velocity that your race car's suspension travels vertically determines the piston speed inside the shock. The faster the piston is forced through the shock's reservoir of oil, the stiffer the shock becomes on both the compression and rebound strokes.

A shock dyno cycles the shock absorber through a wide range of piston speeds (called "shaft velocity" in the industry). The amount of damping force developed is measured along a series of increments in mm/sec or inches/sec.

More Bilstein Technical Info