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      03-15-2019, 03:34 PM   #1
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Brake Fluid Recommendation*

Planning on a HPDE soon

Need fluid recommendation, and how often do I need to flush?
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      03-16-2019, 03:20 AM   #2
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Planning on a HPDE soon

Need fluid recommendation, and how often do I need to flush?
rbf600 once a year
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      03-16-2019, 10:03 AM   #3
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rbf600 once a year
Perfect. And one more question - how much do I need?
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      03-16-2019, 12:27 PM   #4
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Quote:
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Quote:
Originally Posted by pikcachu View Post
rbf600 once a year
Perfect. And one more question - how much do I need?
2 bottles of 500ml should do
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      03-16-2019, 01:46 PM   #5
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      03-16-2019, 02:28 PM   #6
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I use Castrol SRF: https://www.amazon.com/Castrol-SRF-R...dp/B000JL760C/

You flush either when it needs it (i.e., you boiled the fluid at your last event (something that shouldn't happen unless you're overusing the brakes)), or when the club you're running with says you must. For example, my local BMW club requires a brake flush every six months, while the local Porsche club requires an annual brake flush.

If you don't flush before an event, I strongly recommend that you bleed them.
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      03-16-2019, 04:56 PM   #7
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Thank you guys!!
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      03-17-2019, 07:51 PM   #8
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Quote:
Originally Posted by dradernh View Post
I use Castrol SRF: https://www.amazon.com/Castrol-SRF-Racing-Brake-Fluid/dp/B000JL760C/

You flush either when it needs it (i.e., you boiled the fluid at your last event (something that shouldn't happen unless you're overusing the brakes)), or when the club you're running with says you must. For example, my local BMW club requires a brake flush every six months, while the local Porsche club requires an annual brake flush.

If you don't flush before an event, I strongly recommend that you bleed them.
SRF is the best but it's very expensive like 3 times more than rbf and also very hydroscopic so you really need to flush every year at the latest
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      03-18-2019, 06:32 AM   #9
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I typo’d the thread title. Man, I’m out here looking illiterate.
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      03-18-2019, 01:56 PM   #10
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Quote:
Originally Posted by pikcachu View Post
SRF is the best but it's very expensive like 3 times more than rbf and also very hydroscopic so you really need to flush every year at the latest
Yes, it's more expensive than other fluids. It's still a very small cost relative to the overall expense of this hobby.

Regarding SRF's ability to absorb water, I believe the opposite. From Bimmerworld's SRF product description page (https://www.bimmerworld.com/Castrol-...ake-Fluid.html):

"SRF is a hydrophobic fluid - it repels water instead of absorbing it. This allows it to maintain a very high wet boiling point compared to hygroscopic fluids."

That's why I've chosen it, and why it was recommended to me by both Bimmerworld and TC Kline Racing.

In any event, I flush my fluid before each event. It's not necessary, but that's how I choose to do it.
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      03-18-2019, 02:04 PM   #11
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      03-18-2019, 09:31 PM   #12
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Quote:
Originally Posted by dradernh View Post
Quote:
Originally Posted by pikcachu View Post
SRF is the best but it's very expensive like 3 times more than rbf and also very hydroscopic so you really need to flush every year at the latest
Yes, it's more expensive than other fluids. It's still a very small cost relative to the overall expense of this hobby.

Regarding SRF's ability to absorb water, I believe the opposite. From Bimmerworld's SRF product description page (https://www.bimmerworld.com/Castrol-SRF-Synthetic-Racing-Brake-Fluid.html):

"SRF is a hydrophobic fluid - it repels water instead of absorbing it. This allows it to maintain a very high wet boiling point compared to hygroscopic fluids."

That's why I've chosen it, and why it was recommended to me by both Bimmerworld and TC Kline Racing.

In any event, I flush my fluid before each event. It's not necessary, but that's how I choose to do it.
Interesting.
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      03-31-2019, 07:40 PM   #13
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