So brake fluid and boiling points...
If I were doing trackdays in my car, it'd be all about dry boiling point as the car would get regular fluid changes. But since I'm driving on the street, and I'm headed to The Dragon this year (a very twisty road that can be tough on the brakes depending on your driving style and pace), I'm curious as to which cost effective fluid I should buy if I change the fluid a week or two prior to my trip? (Yes I know this is splitting hairs, but if your first reaction is "you're overthinking this too much..." you're right, I love researching this as much as the next forum member.
)
So I unsuccessfully set out to find how long it takes brake fluid to absorb water and register at the wet boiling point. For street cars wet boiling point is the most important when you consider someone should change their brake fluid every ~2 years.
First a definition of wet boiling point... it is defined as the point in which a brake fluid absorbs 3.7% of water by volume. We all know a brake fluid's dry boiling point starts to degrade towards wet boiling point the second the bottle of fluid is opened, but the question is, how fast?
I've found a few websites that talk about this...
The graph on this website would have you think the 3.7% wet boiling point is reached at around the 2yr mark. (http://www.epicbleedsolutions.com/resources/faq/dry-and-wet-boiling-points-dot-brake-fluid/)
In the section labeled "How fast does brake fluid absorb moisture?" It talks about fluid absorbing 4.5-5% in as little as two weeks (http://www.sector111.com/images/products...ake%20Fluid.pdf)
And in this forum a guy tested to find his boiling point only dropped 5-8 degrees over 6mo: (http://rennlist.com/forums/racing-and-dr...tml#post4559900)
So it appears the interwebs is all over the place on when wet boiling point comes into play... what say you?
If I were doing trackdays in my car, it'd be all about dry boiling point as the car would get regular fluid changes. But since I'm driving on the street, and I'm headed to The Dragon this year (a very twisty road that can be tough on the brakes depending on your driving style and pace), I'm curious as to which cost effective fluid I should buy if I change the fluid a week or two prior to my trip? (Yes I know this is splitting hairs, but if your first reaction is "you're overthinking this too much..." you're right, I love researching this as much as the next forum member.
)So I unsuccessfully set out to find how long it takes brake fluid to absorb water and register at the wet boiling point. For street cars wet boiling point is the most important when you consider someone should change their brake fluid every ~2 years.
First a definition of wet boiling point... it is defined as the point in which a brake fluid absorbs 3.7% of water by volume. We all know a brake fluid's dry boiling point starts to degrade towards wet boiling point the second the bottle of fluid is opened, but the question is, how fast?
I've found a few websites that talk about this...
The graph on this website would have you think the 3.7% wet boiling point is reached at around the 2yr mark. (http://www.epicbleedsolutions.com/resources/faq/dry-and-wet-boiling-points-dot-brake-fluid/)
In the section labeled "How fast does brake fluid absorb moisture?" It talks about fluid absorbing 4.5-5% in as little as two weeks (http://www.sector111.com/images/products...ake%20Fluid.pdf)
And in this forum a guy tested to find his boiling point only dropped 5-8 degrees over 6mo: (http://rennlist.com/forums/racing-and-dr...tml#post4559900)
So it appears the interwebs is all over the place on when wet boiling point comes into play... what say you?
