Page 1 of Earl's Performance Plumbing Brake Systems by Holley Performance Products, Inc.

speed-flextm hose brake systems hydraulic systems 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 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 teflon to solve this problem the stiffness of the teflon 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-flextm 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-flextm fuel lubrication systems brake systems in recent years various fuel manufacturers have added any number of new unpublished additives to their blends rendering some of them incompatible with synthetic rubber lined hose earl s speed-flextm teflontm lined stainless braided hose is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-flextm 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 teflontm hose the teflon liner is manufactured in two wall thicknesses commercial 030 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 teflon liner these hoses offer good pressure capacity but limited expansion resistance earl s speed-flextm hose is the standard of the industry hose size an hose i.d in mm hose o.d in mm max op press min bend radius psi bar in mm bulk p/n 3ft 0.9m p/n 6ft 1.8m p/n 10ft 3.0m p/n 20ft 6.1m p/n 33ft 10.1m p/n -2 -3 -3 clear -3 smoke -4 -6 -8 0.08 2.03 0.13 3.30 0.13 3.30 0.13 3.30 0.19 4.83 0.34 8.64 0.56 14.22 0.2 0.25 0.29 0.29 0.44 0.55 0.65 5.08 6.35 7.73 7.73 11.18 13.97 16.51 2000 2000 2000 2000 2000 1500 1000 137.86 137.86 137.86 137.86 137.86 103.40 68.93 1.5 38.1 600002erl 1.5 38.1 600003erl 1.5 38.1 6000031erl 1.5 38.1 6000032erl 1.5 38.1 600004erl 4 101.6 600006erl 5 127 600008erl 603002erl 603003erl 6030031erl 6030032erl 603004erl 603006erl 603008erl 606002erl 606003erl 6060031erl 6060032erl 606004erl 606006erl 606008erl 610002erl 620002erl 633002erl 610003erl 620003erl 633003erl 6100031erl 6200031erl 6330031erl 6100032erl 6200032erl 6330032erl 610004erl 620004erl 633004erl 610006erl 620006erl 633006erl 610008erl 620008erl 633008erl carbon lined for static dissipation pvc covered extruded teflon® when considering the replacement of stock rubber brake hoses with stainless braid-protected hose of extruded teflon® you should consider the following facts stainless steel braid speed-flex hose is intended for use with speed-seal hose ends only no other earl s hose end is intended for use with speed-flex hose the use of other manufacturers hose ends is not recommended the use of stainless braid protected teflon brake hose assemblies will result in a firmer brake pedal improved brake pedal feel and better brake modulation these hoses will not necessarily provide longer hose life or any other advantage we have independent test lab reports on file showing that prototype assemblies exceeded d.o.t recommendations in all categories the only continuing test program however is a 4000 p.s.i hydrostatic pressure test of every assembly that we make we do not claim that any individual hose assembly is certifiable to d.o.t standards and we therefore must advise you that they are sold to be used on off-road applications only we make no claim of useability or suitability for highway or road use teflon brake hoses must be installed by an experienced professional mechanic after installation each hose must be both clean and free flowing there must be no possibility that the installed hose assemblies can stretch crimp or kink under any conditions of wheel travel and steering angle as with any hose installation periodic inspection of hose condition is essential ® teflon is a registered trademark of du pont 62 www.earlsplumbing.com

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