Brake Fluids for GT3 Track Use...
09-21-2020, 01:11 AM
#16
One thing I have learned in the past about SRF is firm pedal feel, as long as you bleed properly you can definitely count on it.
For reference, I participate 15-20 HPDEs annually on average, and I change my fluid once a year.
I have never had "mushy brake pedal feel" with SRF in my experience.
For reference, I participate 15-20 HPDEs annually on average, and I change my fluid once a year.
I have never had "mushy brake pedal feel" with SRF in my experience.
09-21-2020, 11:12 AM
#17
SRF states it should be flushed/replaced every 18 months whereas most other fluids state 2 years. That’s generally not too much of an issue in an often used track car though. I’ve used it for years but recently tried the Endless RF650 and liked it a lot also
09-21-2020, 05:55 PM
#20
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Tried SFR did not like the pedal feel. Now use endless feels like stock.
09-21-2020, 07:09 PM
#21
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Pretty much all brands of the "racing" brake fluids are good for track use. I'll add PFC 665 as one more option. PFC 665 is the factory brake fluid for 991 Cup, Cup M-R, and GT4 Clubsport. We use PFC fluid on street/track cars as well.
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TPC Racing stats:
2023 Porsche Sprint Challenge 992 Cup Am Champion
2023 Porsche Sprint Challenge GT4 Pro-Am Team Champion
2022 Porsche Sprint Challenge 992 Cup & 991 Cup Champion
2020 IMSA GT3 Cup Challenge 2nd Championship
2018 IMSA GT3 Cup Challenge 2nd Championship
2016 IMSA GT3 Cup Challenge Champion
2013 IMSA GT3 Cup Challenge Champion
2006 Rolex-24 @ Daytona GT Champion
2004 Grand-Am SGS Class Champion
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cox1974 (09-22-2020)
09-21-2020, 07:12 PM
#22
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09-21-2020, 07:22 PM
#23
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They started using PFC fluid on the 2014 991 Cup. They'll likely change fluid vendor again for the 992 Cup. All the different brands of racing brake fluid used by Porsche factory race cars has been good.
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GrantG (09-21-2020)
09-21-2020, 09:12 PM
#24
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Thread Starter
More questions...
--> Are there ANY downsides for using any kinds of "RBF" on the street?
--> Do they also need some kinds of temperature to work properly like racing brakes?
--> Winter is around the corner and I still drive my car on the streets as long as it's not snowing so I want to ensure safety for cold winter street use.
--> Are there ANY downsides for using any kinds of "RBF" on the street?
--> Do they also need some kinds of temperature to work properly like racing brakes?
--> Winter is around the corner and I still drive my car on the streets as long as it's not snowing so I want to ensure safety for cold winter street use.
09-21-2020, 09:32 PM
#25
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More questions...
--> Are there ANY downsides for using any kinds of "RBF" on the street?
--> Do they also need some kinds of temperature to work properly like racing brakes?
--> Winter is around the corner and I still drive my car on the streets as long as it's not snowing so I want to ensure safety for cold winter street use.
--> Are there ANY downsides for using any kinds of "RBF" on the street?
--> Do they also need some kinds of temperature to work properly like racing brakes?
--> Winter is around the corner and I still drive my car on the streets as long as it's not snowing so I want to ensure safety for cold winter street use.
-From my knowledge, I don't believe brake fluids have a minimum operating temp.
-I'm in SoCal, so I can't help with the snow bit. Sorry!
09-22-2020, 12:06 AM
#26
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More questions...
--> Are there ANY downsides for using any kinds of "RBF" on the street?
--> Do they also need some kinds of temperature to work properly like racing brakes?
--> Winter is around the corner and I still drive my car on the streets as long as it's not snowing so I want to ensure safety for cold winter street use.
--> Are there ANY downsides for using any kinds of "RBF" on the street?
--> Do they also need some kinds of temperature to work properly like racing brakes?
--> Winter is around the corner and I still drive my car on the streets as long as it's not snowing so I want to ensure safety for cold winter street use.
Last edited by GrantG; 09-22-2020 at 12:11 AM.
09-22-2020, 01:30 AM
#27
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Thread Starter
-I've use a minimum of Motul RBF600 on any car in my garage for at least the last decade, currently using Endless RF650 on any vehicle that's driven on track (due to the current scarcity of SRF). Never had any problems on the daily drivers using "RBF".
-From my knowledge, I don't believe brake fluids have a minimum operating temp.
-I'm in SoCal, so I can't help with the snow bit. Sorry!
-From my knowledge, I don't believe brake fluids have a minimum operating temp.
-I'm in SoCal, so I can't help with the snow bit. Sorry!
09-22-2020, 07:31 PM
#28
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I don't have many experiences with the Motul Fluids... however, I have driven my friend's GT3RS with the Motul 660, and feels a bit softer on the peddle... Not sure if the fluid does anything in the stiffness but definitely a difference from my car with the SRF... We have exact same cars, same brakes
I see that there are listings on amazon and eBay but both have different packaging from the ones I saw today... the sales at the shop told me it's a new product and a few guys have switched to it from the SRF... Not sure if he's speaking the truth or just trying to sell... Don't get me wrong! I am using the Pagid RSC pads with my PCCB and would love to try out this fluid for track use!
I see that there are listings on amazon and eBay but both have different packaging from the ones I saw today... the sales at the shop told me it's a new product and a few guys have switched to it from the SRF... Not sure if he's speaking the truth or just trying to sell... Don't get me wrong! I am using the Pagid RSC pads with my PCCB and would love to try out this fluid for track use!
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Parts | Tech-Session | Facebook | Youtube
Jason Burkett
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Tech Session - Porsche Tech & Info*- 361.289.8834
jason@paragon-products.com
09-23-2020, 10:09 AM
#30
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Re brake pedal "feel" often mentioned in discussions on brake fluid, is this imagined or real? since fluids are pretty incompressible at the pressures used in braking systems - how can one fluid give a different brake feel to the next?
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PiB993 (09-17-2023)