Castrol React SRF racing brake fluid DOT 4
#1
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is this brake fluid compatible with the 993 system or not? I read that it based on silicone ester technology. However, I have heard that a silicone based brake fluid should not be used in the 993 system.
True or False ?
I have heard read that some people are using it. Any issues with swelling rubber? Leaks?
True or False ?
I have heard read that some people are using it. Any issues with swelling rubber? Leaks?
#2
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is this brake fluid compatible with the 993 system or not? I read that it based on silicone ester technology. However, I have heard that a silicone based brake fluid should not be used in the 993 system.
True or False ?
I have heard read that some people are using it. Any issues with swelling rubber? Leaks?
True or False ?
I have heard read that some people are using it. Any issues with swelling rubber? Leaks?
silicon based fluid is DoT 5 and is not recommended for normal use
While SRF is one of the best fluids available(It's wet boiling point is over 100F higher than the next best fluid) it is also expensive and not usually necessary unless the brakes are thermally overstressed. 993 brakes are generally not particularly stressed. All the other DoT 4s cluster around the low 400 to high 300F range. Including ATE 200
oe fill is ATE 200 which is also a DoT 4 fluid
.
#4
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The compressibility of Castrol React SRF Racing is very similar to that of current DOT 3 and DOT 4 fluids.
It can therefore be filled into any braking system used in motor sport with the exception of those for which a mineral oil is prescribed.
It gives a “hard pedal” feel.
https://www.castrol.com/en_au/austra...rf-racing.html
no issues, but I feel silly when I spend that much on brake fluid.
motul rbf is half the price.
https://www.pegasusautoracing.com/gr...pID=BRAKEFLUID
It can therefore be filled into any braking system used in motor sport with the exception of those for which a mineral oil is prescribed.
It gives a “hard pedal” feel.
https://www.castrol.com/en_au/austra...rf-racing.html
no issues, but I feel silly when I spend that much on brake fluid.
motul rbf is half the price.
https://www.pegasusautoracing.com/gr...pID=BRAKEFLUID
#6
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The compressibility of Castrol React SRF Racing is very similar to that of current DOT 3 and DOT 4 fluids.
It can therefore be filled into any braking system used in motor sport with the exception of those for which a mineral oil is prescribed.
It gives a “hard pedal” feel.
https://www.castrol.com/en_au/austra...rf-racing.html
no issues, but I feel silly when I spend that much on brake fluid.
motul rbf is half the price.
https://www.pegasusautoracing.com/gr...pID=BRAKEFLUID
It can therefore be filled into any braking system used in motor sport with the exception of those for which a mineral oil is prescribed.
It gives a “hard pedal” feel.
https://www.castrol.com/en_au/austra...rf-racing.html
no issues, but I feel silly when I spend that much on brake fluid.
motul rbf is half the price.
https://www.pegasusautoracing.com/gr...pID=BRAKEFLUID
The highest wet boiling points which is the main thing to look for after DoT 4 are all DoT 4 or 5.1(note Dot 5.1 is still a polyglycol-ether based fluid unlike DoT 5 which is silicon based and dyed purple)
For my street cars I use ATE200(or ATE bue which is 200 dyed blue)(388) for the track car Motul(though 200 worked fine there too until the pads get a bit thin)(400)
after SRF(518) the best is Torque RT700(439) then Project Mu(430) and Endless(424)
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#9
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FWIW, I did notice a positive difference in feel (firmness) between endless and the brembo race fluid. I prefer the brembo fluid and gave a case of endless away when I changed. I have never had either fluid boil over or lose brake feel. I use ATE200 on street cars. Unfortunately brembo doesn't publish the wet spec, the dry is one of highest. I've asked my shop to call their contact to see if it's available.
#10
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FWIW, I did notice a positive difference in feel (firmness) between endless and the brembo race fluid. I prefer the brembo fluid and gave a case of endless away when I changed. I have never had either fluid boil over or lose brake feel. I use ATE200 on street cars. Unfortunately brembo doesn't publish the wet spec, the dry is one of highest. I've asked my shop to call their contact to see if it's available.