Wilwood Engineering - High Performance Disc Brakes



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Wilwood’s specially formulated Hi-Temp° 570 Racing Brake Fluid has a minimum 570° F dry boiling point to withstand the severe heat requirements of automotive racing. Hi-Temp° 570’s low viscosity allows easy bleeding of your brake system, eliminating aeration of the brake fluid caused by foaming due to excessive pumping of the pedal. Hi-Temp° 570 comes in convenient 12 ounce containers hermetically sealed to guarantee against unwanted absorption of moisture which can drastically lower the fluids boiling point (fluid from larger containers tends to become contaminated with moisture, lowering its boiling point and making it unsuitable for racing applications). Available by the bottle, in six-packs or economical 24 bottle cases.
DESCRIPTION	PART NO.
Wilwood Hi-Temp° 570 (24 bottle case)	290-0633
Wilwood Hi-Temp° 570 (6 pack)	290-2210
Wilwood Hi-Temp° 570 (12 ounce bottle)	290-0632

EXP 600 Plus is a highly refined blend developed for extreme performance under the high heat and extreme pressure of professional motorsports. What’s in a number? EXP 600 Plus has tested to 626 degrees F with a wet boiling point of 417 F. These numbers far exceed any DOT or SAE specifications. What’s the real test? It is true that racing fluids need to have high boiling points. It is also true that fluids need to have low moisture affinity to slow the natural absorption rate of water vapor. But the true test of any fluid is how well it resists aeration and compressibility after it has been heated and pressure cycled a few hundred times. The real test is at the track. EXP has proven to maintain firm pedal feel and quick response, long after others have failed. Where’s the proof? A Winston Cup car racing for 500 laps at Martinsville is the most grueling brake test in all of motorsports. The brakes will be applied up to 1,000 times, plus pit stops, at sustained high heat and repeated high pressure. IRL, CART, ASA, Busch, Craftsman Trucks, and a whole world of other oval and road course competition series also demand extreme performance from their brake systems. EXP 600 Plus has passed the test in every series! Note: For optimum performance, EXP 600 Plus should not be diluted with any other brake fluids. Add new fluid to a clean system.

DESCRIPTION	PART NO.
Wilwood EXP 600 (bottle, 500ml, 16.9 fl oz)	290-6209
Wilwood EXP 600 (Case, 20 each 500 ml bottles, 16.9fl oz)	290-6210

BRAKE FLUID:

Due to the extreme operating temperatures of a high performance brake system, standard “off-the-shelf” brake fluids are not recommended. Of critical importance in determining a fluids ability to handle high temperature applications is the Dry Boiling Point and compressibility.

The Dry Boiling Point is the temperature at which a brake fluid will boil in its virgin non-contaminated state. The highest temperature Dry Boiling Point available in a DOT 3 fluid is 572° F.

The Wet Boiling Point is the temperature a brake fluid will boil after it has been fully saturated with moisture. The DOT 3 requirement for wet boiling point is a minimum temperature of 284° F.

There are many ways for moisture to enter your brake system. Condensation from regular use, washing the vehicle and humidity are the most common, with little hope of prevention. Glycol based DOT 3 & 4 fluids are hygroscopic; they absorb brake system moisture, and over time the boiling point is gradually reduced.

Wilwood does not recommend using DOT 5 fluid in any racing applications. DOT 5 fluid is not hygroscopic, so as moisture enters the system, it is not absorbed by the fluid, and results in beads of moisture moving through the brake line, collecting in the calipers. It is not uncommon to have caliper temperatures exceed 200° F, and at 212° F, this collected moisture will boil causing vapor lock and system failure. Additionally, DOT 5 fluid is highly compressible due to aeration and foaming under normal braking conditions, providing a spongy brake feel. DOT 5 fluid is best suited for show car applications where its anti-corrosion and paint friendly characteristics are important.

Whenever you add fresh fluid to your existing system (never mix fluids of different DOT classifications), it immediately becomes contaminated, lowering the boiling point of the new fluid. For maximum performance, start with the highest Dry Boiling Point available (try Wilwood’s Hi-Temp° 570 Racing Brake Fluid), flush the system completely, and flush it regularly, especially after severe temperatures have been experienced.