Speed-Flex™ Hose by Earl's Performance®. Standard automotive flexible brake hoses are manufactured from synthetic rubber and reinforced with multiple layers of fabric braid. They were designed and developed for use with drum brake systems. When disc brakes were developed for racing cars, line pressure requirements increased considerably.
- Use Of Extruded PTFE
- Stainless Steel Outer Braid
- Solves Pedal Travel Problem
- Increased Brake Pedal Firmness
- Modulate Brakes Efficiently
- Improved Abrasion Resistance
- Increased Temperature Capacity
- Impervious To Any Fuel Blend
- -65° to +450° F Operating Temperature
With the larger and heavier cars, like Ford’s GT-40s, enough of the available brake pedal travel was used up in expanding the flexible brake hoses so that there was insufficient pedal travel left for safe braking. In the mid-1960s, Earl’s pioneered the use of armored flex hose of extruded PTFE to solve this problem. The stiffness of the PTFE liner combined with the tightly woven high tensile stainless steel outer braid solved the pedal travel problem. By eliminating the line swell it also dramatically increased the firmness and feel of the brake pedal which allowed the drivers to modulate the brakes more efficiently. Improved abrasion resistance and increased temperature capacity are secondary advantages. Since brake actuation produces high pressure with very little fluid displacement, we recommend -2 & -3 SPEED-FLEX™ for brake systems. Clutch actuation, on the other hand, requires moderate pressure but considerable displacement of fluid. For hydraulic clutch systems we recommend the use of -4 SPEED-FLEX™.
In recent years various fuel manufacturers have added any number of new unpublished additives to their blends rendering some of them incompatible with synthetic rubber lined hose. Earl’s Speed-Flex™ PTFE lined stainless braided hose is impervious to any automotive fuel blend known to us and may be the best choice for use with modern racing gasolines. All SPEED-FLEX™ hoses are compatible with gasoline, hydrocarbon fuels, alcohols, nitro-methane, mineral and synthetic lubricants, and high density fuel additives. Size 6 and 8 are carbon lined to dissipate static electricity. Some caution is necessary in the selection of armored PTFE hose. The PTFE liner is manufactured in two wall thicknesses, commercial (.03") and aircraft specification (.040"), Earl’s uses the thicker and stronger wall. There are also hoses in the marketplace manufactured in such a manner that the stainless braid is loose on the PTFE liner. These hoses offer good pressure capacity but limited expansion resistance. Earl’s SpEED-flEx™ hose is the standard of the industry.
With many years of experience Earl’s Performance Plumbing® can be rightfully called one of the major players in performance plumbing market. Right here in the USA Earl’s proudly manufactures the highest quality parts and accessories, which do the great job of transferring fluids through the vehicle in a safe and reliable way. The company's diverse product line includes an extensive choice of hose, hose ends and fittings, oil coolers, and other performance parts. Both serious racers and street performers can benefit from Earl's plumbing solutions. State-of-the-art equipment and precision CNC machining technologies allow the company to ensure the continued quality of its products.