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Brake Fluid - Red Line RL-600

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Old Apr 28, 2016 | 07:46 AM
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Brake Fluid - Red Line RL-600

http://www.redlineoil.com/product.aspx?pid=148&pcid=29

Anyone try this stuff? Specs look good, may give it a shot for the next track day
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Old Apr 28, 2016 | 08:06 AM
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I've had decent result with Project Mu G-Four. Its dry boiling point is 335*C. $65 a liter from Evasive though...lol. I was having problems with both Motul fluids getting spongy. Report back on the redline.
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Old Apr 28, 2016 | 08:12 AM
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will do - i'll probably back to back it with amsoil's dot4, way back from boomn929's review of it.
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Old May 2, 2016 | 04:40 AM
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you can get castrol srf on amazon for $65 shipped per liter. the redline wet boiling point is only 400*

Brembo LCF600 Dry: 316°C (601°F) Wet: 204°C (399°F) 16.9oz/ .53 quarts .50 Liter/ 500ml
CASTROL SRF Dry: 310°C (590°F) Wet: 270°C (518°F) 1 Liter
MOTUL RBF600 Dry: 312°C (594°F) Wet: 216°C (421°F) 16.9oz/ .53 quarts .50 Liter/ 500ml
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Old May 3, 2016 | 07:37 AM
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how many does a bleed take? 2 liters or so? I ran amsoil's dot4 for the pdx I did, seemed to work fine.. stock power levels, pdx and hpdes, no "racing" - good enough? Castrol srf would be my go-to if I were racing without a doubt.
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Old May 3, 2016 | 07:46 AM
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You should be able to do a complete flush with one liter of fluid.
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Old May 3, 2016 | 10:09 AM
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yeah, 1L will do a complete flush
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Old May 3, 2016 | 10:49 AM
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Ran SRF for a season but still got pedal travel about 2/3's the way through the race. A brake fluid's compressability at high temps is more important then wet or dry boiling points.
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Old May 3, 2016 | 11:01 AM
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but if it boil, you have no brakes at all
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Old May 3, 2016 | 11:24 AM
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I just don't use my brakes. Problem solved lol
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Old May 3, 2016 | 11:26 AM
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Originally Posted by honda-guy
but if it boil, you have no brakes at all
Yes...and no. If I were boiling SRF, with the highest wet boiling point, that would be totally true Which is where the Houdini act comes in. It's not bad fluid, it's just not the best over time. Look over here at this million degree statistic but ignore the rest of the engineering numbers lol. From several years ago, see below:

Our RF-650 and the AP600 are very stable, with the RF-650 being a bit better. However, the SRF drops off violently when you get water in it. This means you can keep the RF-650 in there longer without having to do a full flush in fear of having water in the system. Water in the system means it’ll boil giving you a spongy brake pedal.

Now the other issue; compressibility. With our RF-650 brake fluid being standard original equipment on all Porsche GT3 Cup cars (Yes. Standard equipment from Porsche.), a lot of various teams in the US have been in close contact with me regarding it. Most have never heard of it before Porsche started using it as an OE part 2 years ago. Most of them had been using Castrol SRF.

What these GT3 Cup car teams have been telling me is that they’d put the fluid in the system, bleed it, and then go out on track. 5 or 10 minutes into the session the drivers would report the brake pedal feeling soft. So, they’d bring the cars in and check for air only to find none in the system. The actual issue ended up being compressibility. In short, different brake fluids compress more than others which accounted for the drivers reporting a soft pedal.

The teams tried a bunch of different fluids before realizing they should try ours (reason being they had never heard of Endless and they didn’t know where to get it). The teams tried AP, Motul, and others even I had never heard of, all still ending up with the same issue. Finally, when the GT3 Cup cars ran at the Formula 1 Grand Prix in Canada, they talked to the F1 teams. What they found out is that there are only two brake fluids used in Formula 1; one being Endless. Turns out the Brembo fluid and ours are the only ones without severe compressibility issues.


So.. if F1 and Cup cars aren't "boiling" RF650 but are SRF, that should give you the broader picture of what really goes on with hydraulic fluids in motorsports. When we say boiling, what they really mean is compromising the fluid. Water is to brake fluid what gas/eth is to motor oil. The more resistant it is to the inevitable outside influence, the more stable it is, = win.
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Old May 3, 2016 | 11:35 AM
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ive never tried the endless. never had issues after switching to sfr, so didn't really need to look else where. but i also dont race w2w and im at stock power level, so my brake needs aren't that bad.

that's good info though
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Old May 3, 2016 | 11:58 AM
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I was going to comment on someone mentioning Endless a while ago, saying they didn't have fade even without air ducts, but just thought never mind. I guess this reinforced my previous information. Thanks!
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Old May 3, 2016 | 12:22 PM
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Originally Posted by Balrok
Yes...and no. If I were boiling SRF, with the highest wet boiling point, that would be totally true Which is where the Houdini act comes in. It's not bad fluid, it's just not the best over time. Look over here at this million degree statistic but ignore the rest of the engineering numbers lol. From several years ago, see below:

Our RF-650 and the AP600 are very stable, with the RF-650 being a bit better. However, the SRF drops off violently when you get water in it. This means you can keep the RF-650 in there longer without having to do a full flush in fear of having water in the system. Water in the system means it’ll boil giving you a spongy brake pedal.

Now the other issue; compressibility. With our RF-650 brake fluid being standard original equipment on all Porsche GT3 Cup cars (Yes. Standard equipment from Porsche.), a lot of various teams in the US have been in close contact with me regarding it. Most have never heard of it before Porsche started using it as an OE part 2 years ago. Most of them had been using Castrol SRF.

What these GT3 Cup car teams have been telling me is that they’d put the fluid in the system, bleed it, and then go out on track. 5 or 10 minutes into the session the drivers would report the brake pedal feeling soft. So, they’d bring the cars in and check for air only to find none in the system. The actual issue ended up being compressibility. In short, different brake fluids compress more than others which accounted for the drivers reporting a soft pedal.

The teams tried a bunch of different fluids before realizing they should try ours (reason being they had never heard of Endless and they didn’t know where to get it). The teams tried AP, Motul, and others even I had never heard of, all still ending up with the same issue. Finally, when the GT3 Cup cars ran at the Formula 1 Grand Prix in Canada, they talked to the F1 teams. What they found out is that there are only two brake fluids used in Formula 1; one being Endless. Turns out the Brembo fluid and ours are the only ones without severe compressibility issues.


So.. if F1 and Cup cars aren't "boiling" RF650 but are SRF, that should give you the broader picture of what really goes on with hydraulic fluids in motorsports. When we say boiling, what they really mean is compromising the fluid. Water is to brake fluid what gas/eth is to motor oil. The more resistant it is to the inevitable outside influence, the more stable it is, = win.
Well then, looks like I'll be switching from the Project Mu I've been using...lol. My pedal still gets somewhat soft with the Project Mu fluid. And the Endless is $25 less per liter. Win.
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Old May 4, 2016 | 12:10 PM
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some good specs between the top brake fluids.

http://torquebrakefluid.com/compare_...ke_fluids.html

the Torque RT700 seem to test even better than the Endless. higher boiling point and lower compressibility in all temp range. im going to give RT700 a try.

Last edited by honda-guy; May 4, 2016 at 12:22 PM.
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