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Motorsports & Track Forum by BimmerWorld
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Old 03-30-2006, 02:48 PM   #1
pdydy
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brake fluid~

Is it recommended to change the stock brake fluid for the track?
I heard that the bmw brake fluids are dot4. would that be enough?
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Old 03-30-2006, 02:59 PM   #2
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in addition to changing brake fluid to fluid with highler boiling points, overtime as the braking system is subject to condensation, etc. water can get into the brake fluid which changes the overall properties of the fluid.

i change brake fluid atleast 2x a year and would definitely recommend swapping the stock fluid for something a little better, be it super blue, or even valvoline syn availible at local autostores.
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Old 03-30-2006, 09:10 PM   #3
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Yes I would change it. It's a regular maintenance item that most people forget. I would recommend ATE Super Blue/TYP 200 or Motul 600. You will need roughly 1.5 liters.
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Old 03-31-2006, 07:26 AM   #4
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Old 04-03-2006, 10:53 PM   #5
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ATE Super Blue is a great fluid. I even use it in our GT M3's. Our old 330's even ran 1400deg front rotor temps (at 3 Rivers) and the fluid never gave out. All it did was ignite after the piston was ground into the rotor (after the race). Up until that point, the pedal was just fine.
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Old 04-04-2006, 11:02 AM   #6
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Quote:
Originally Posted by pdydy
Is it recommended to change the stock brake fluid for the track?
I heard that the bmw brake fluids are dot4. would that be enough?
Is this your first time at the track? I think it's good to just keep it as is for your first or second time. So at least you know what it means to experience spongy brakes. That's my approach and it helps me to understand the car and my driving skills a lot more. I have seen pple upgrade everything for the first track and til today they have no idea what brake fading is.
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Old 04-04-2006, 01:21 PM   #7
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Quote:
Originally Posted by Mr Paddle.Shift
Is this your first time at the track? I think it's good to just keep it as is for your first or second time. So at least you know what it means to experience spongy brakes. That's my approach and it helps me to understand the car and my driving skills a lot more. I have seen pple upgrade everything for the first track and til today they have no idea what brake fading is.
Very good point.
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Old 04-05-2006, 03:10 AM   #8
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yea~ it's my first time.
well, is there anyway that i can test the fading of the brakes?
cuz a friend was telling me that the fluid is essential to last the whole day.
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Old 04-05-2006, 10:14 AM   #9
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Originally Posted by pdydy
yea~ it's my first time.
well, is there anyway that i can test the fading of the brakes?
cuz a friend was telling me that the fluid is essential to last the whole day.
Your buddy is misinformed. I did my first DE on stock everything. I came out fine. You won't be pushing your car to its limit the first time out. Most of your time will be dedicated to just getting a feel for your car on the track. After that you'll want to pay attention to racing lines and braking zones.

I wouldn't recommend testing for brake fade on the street. It's best reserved for a DE or an AutoX where there's less risk of hitting an innocent minivan carrying kids (and you won't get in trouble for reckless driving either). You'll know when it's brake fade when you have your foot on the middle pedal and you have significantly decreased stopping power. Think along the lines of "OMG that corner is approaching and I don't think I can slow down enough!"
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Old 04-05-2006, 12:00 PM   #10
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I was considering of buying some brake pads, is that recommended?
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Old 04-05-2006, 04:05 PM   #11
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If this is your first time, unless your brakes need the maintance, I would leave them alone. Make sure that the pads and rotors are in good shape and that you brake fluid is full. Make sure all of you fluids are full and check you tire pressure to make sure they are in MFG specs.

For your first time, focus on getting around the course smoothly. Learn your turn-in and braking points. Learn to be smooth on the brakes and throttle. Take a little time and learn to steer with the throttle and brake. Learn the dynamics of understeer and oversteer.

I wouldn't run multiple events on OEM fluid, but one or two won't hurt. Who knows, you may not like it, and the upgraded pads and fluid will be money lost.

If you enjoy it and plan on doing it a lot, upgrade your pads and fluid. Remember, you're also going to go through tires and rotors faster, so keep an eye on them, too.

Generally speaking, what's good for the track and auto crossing usually make for really poor street/daily driving characteristics.

Remember more than anything, safety first! Have fun.
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Old 04-10-2006, 11:15 AM   #12
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Motul RBF600. Best stuff out there. I just got 3 bottle for free at the SEMA show in Philly.

It's your first time so you likely won't be pushing the car hard enough to experience brake fade but upgrading to a better fluid and doing a proper bleed can never be a bad thing either on the track or on the street. Brake fluid isn't like most "track mods" since its certainly a good thing to upgrade even for street driving. Its not like you're putting on track pads that have a certain operating temp that, on the street, won't function safely. Know whata mean?
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Old 04-10-2006, 11:18 AM   #13
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Motul RBF600. Best stuff out there.
I wouldn't go that far, but it's better than ATE TYP 200/Super Blue.
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Old 04-10-2006, 11:52 AM   #14
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Originally Posted by vaio76109
I wouldn't go that far, but it's better than ATE TYP 200/Super Blue.
Ok, best stuff out there that can still be considered a readily available consumer production. Not a pure-bred race fluid.
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Old 04-13-2006, 08:55 AM   #15
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I <3 my super blue
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Old 04-17-2006, 07:35 PM   #16
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Alrite, i gotta say that stock brakes and dealership brake fluid are pretty descent for the track.
I had no brake fading at all.
How different is it with the hp plus brake pads?
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Old 04-17-2006, 07:35 PM   #17
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Alrite, i gotta say that stock brakes and dealership brake fluid are pretty descent for the track.
I had no brake fading at all.
How different is it with the hp plus brake pads?
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Old 04-17-2006, 09:32 PM   #18
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Motul RBF600 is good, but absorbs water faster than ATE SuperBlue. This means more frequent flushes. I like SuperBlue.
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