![]() ![]() AP 551 brake fluid is suitable for most forms of motorsport where a DOT 3 specification is recommended, but has a higher boiling point than similar DOT 3 brake fluids intended for road use.ĬASTROL REACT PERFORMANCE BRAKE FLUID. Similar in characteristics to AP 600 brake fluid.ĪP RACING 551 BRAKE FLUID. Millers 300 Plus Racing Brake fluid is designed for racing and high performance use where high temperatures are experienced. when using carbon/carbon discs and the ultimate in brake fluid performance are required. AP 600 Fluid has been developed for racing applications where higher than normal temperatures are being experienced, e.g. Due to it's extremely high dry & wet boiling points.ĪP RACING 600 BRAKE FLUID. ![]() If you want the best the Castrol SRF is it. The SRF is the absolute best brake fluid on the market. These are the brake fluids we stock here at Merlin Motorsport.ĬASTROL REACT SRF. It is always best to use the correct and race specific brake fluids in your race car. WET BOILING POINT: The minimum temperature that the brake fluid will boil when the fluid has 3% water by volume of the systemĭRY BOILING POINT: The temperature that brake fluid will boil with no water present in the system The standard DOT type fluids are not really adequate.īrake Fluid Type Dry Boiling Point Wet Boiling Point The maximum boiling point is important when selecting a fluid for a race car the minimum dry boiling point should be 250☌ or higher if possible. A high boiling point is necessary for racing applications due the massive heat build up in the rotors that is transferred through the calipers to the brake fluid. The most important characteristic of any brake fluid when used in a race car is the boiling point. ![]() Changing the brake fluid in a race car on a regular basis will greatly increase the performance of the brake system.īrake fluids are rated by the DOT specification. Less compressibility of the brake fluid will increase pedal feel. Glycol based brake fluids are two times less compressible than Silicone based fluids. ![]() Silicone based brake fluid has not been developed for, or intended for, use in race applications. This type of fluid is more compressible and can give the driver a feeling of a spongy pedal. An added bonus when used in some show cars. Often used in classic and vintage cars and military type vehicles because silicone based brake fluid will not corrode internal brake parts nor will it damage paint work. This type of fluid is non-hygroscopic, meaning it does not absorb any water. Hence why Glycol brake fluids have dry boiling points and wet boiling points, dry for when new, wet for when some moisture has been absorbed. In a passenger car this is not a problem however in a race car it is a major issue, due to the boiling point decreasing, the performance ability will also decrease. This absorbed moisture will drastically reduce the boiling point of the fluid. Hence why road car manufacturers recommend changing brake fluid at suggested timed intervals A certain amount of Glycol will absorb a certain amount of moisture within a certain time frame. In fact, it will absorb a tiny amount of water from the moment it has been manufactured and nothing can be done to stop this. Glycol based brake fluid is hygroscopic meaning it has the ability to mix with water and still perform adequately. However this ingredient is not susceptible to boiling. The key ingredient Glycol Ethylene has high lubrication properties to lubricate the rubber parts. Glycol based brake and clutch fluid is that most commonly used within the motor industry. You can get Poly/Glycol Ethylene and Silicon based. Also leaks and air in the system will result in the pedal travelling to far and loose the pressure you have generated to stop the car.Ī very important thing to keep in mind is when you purchase brake fluid they are not all the same. One of the enemies of brake fluid is heat!! If enough heat is transferred into the fluid and is able to boil the fluid this will result in brake fade. The basic premise is the brake fluid is non compressible thus being able to exert the correct force through the brake lines and to the calipers. This brake fluid is the solid / physical connection delivering the force you exert on the brake pedal to the brake calipers. Brake Fluids- Glycol & Silicone explained Brake Fluids What's the difference between Glycol and Silicone based brake fluids?īrake fluid is the precious fluid in a brake system. ![]()
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