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Nark
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Brake fluid recommendations Thu, 25 August 2005 04:01 Go to next message
Hey all,
After a spirited drive in the mountains around Canberra, I've managed to boil the brake fluid in the Liberty*.

Any recommendations on a brake fluid? I'm prolly gonna go for Dot 4 stuff. Maybe Dot 5, who knows.





* Well I think I've boiled it. Pedal has gone long and braking is very inconsistant. Sometimes it's good, other times bad.

[Updated on: Thu, 25 August 2005 04:02]

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4agte
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Re: Brake fluid recommendations Thu, 25 August 2005 04:21 Go to previous messageGo to next message
dot 5 is corrosive to rubber if i remember correctly so i would steer clear of it unless you have steel brake lines..

Dot 4 is fine i brake pretty hard and on the track with dot 4 ive never had any troubles whatsoever
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justcallmefrank
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Re: Brake fluid recommendations Thu, 25 August 2005 05:10 Go to previous messageGo to next message
Dot 5.1 is fine as it's not silicon based. That said, the Castrol Super Response Dot 4 seems highly recommended and beats most of the ones I compared it to on specs by a lot.
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Youngy
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Re: Brake fluid recommendations Thu, 25 August 2005 05:11 Go to previous messageGo to next message
Motul RBF 600 hands down.
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Nark
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Re: Brake fluid recommendations Thu, 25 August 2005 05:15 Go to previous messageGo to next message
justcallmefrank wrote on Thu, 25 August 2005 15:10

Dot 5.1 is fine as it's not silicon based. That said, the Castrol Super Response Dot 4 seems highly recommended and beats most of the ones I compared it to on specs by a lot.


Yeah, I've used this for years in the Celica and would be my choice.

Just thought I'd ask and see other peoples' opinions.
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justcallmefrank
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Re: Brake fluid recommendations Thu, 25 August 2005 05:19 Go to previous messageGo to next message
Youngy wrote on Thu, 25 August 2005 13:11

Motul RBF 600 hands down.

...although this looks pretty damn good.
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Toobs
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Re: Brake fluid recommendations Thu, 25 August 2005 05:23 Go to previous messageGo to next message
DOT 5 is silicon based and has different properties to the glycol based dot 3 / 4 fluids.
DOT 5.1 however is glycol based but has the boiling point of DOT 5 fluids... i.e. its just a DOT 4 fluid with boiling point of DOT 5.

Find out what DOT 5.1 fluids you can get your hands on and then check their wet / dry boiling points.
Motul is one of the best DOT 5.1 fluids that is commonly available IIRC.
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Nark
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Re: Brake fluid recommendations Thu, 25 August 2005 06:12 Go to previous messageGo to next message
Alright. Some numbers would be good to look at.

Name           Dry BP  Wet BP  Vis -40  Vis 100
Dot 3:           205    140      1500     1.5
Dot 4:           230    155      1800     1.5
Dot 5:           260    180      
Motul RBF600:    312    216      1720     2.5
Motul 5.1:       270    185       820     2.1
Castrol S.R.:    286    184      1250     2.5
Castrol SRF:     310    270       130     3.5
Nulon Xtreme:    286    184      1231     2.5
Wilwood 570:     299    140
Wilwood 600:     330    214
Spec sheets:
Motul RBF600
Motul 5.1
Castrol Response Super Dot 4
Castrol SRF
Nulon Xtreme

[Updated on: Thu, 08 September 2005 06:20]

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monkeymajik
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Re: Brake fluid recommendations Fri, 26 August 2005 15:59 Go to previous messageGo to next message
Nulon Xtreme is supposed to be good without costing the earth (for brake fluid)
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kingmick
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Re: Brake fluid recommendations Sat, 27 August 2005 01:30 Go to previous messageGo to next message
just get same wilwood brake fluid nark!$15 a bottle and works very well in the race cars.or AP at $90 which isnt really needed on the street.
mick
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Nark
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Re: Brake fluid recommendations Thu, 08 September 2005 04:50 Go to previous messageGo to next message
Mick, where can I get that Wilwood stuff?

Castrol Response Super is ~$10/500mL from Supercheap.
The RBF 600 is ~$25/500mL from Shift Motorsport in Lansvale.

I can't see the RBF 600 being 2.5 times better than the Response Super (which already exceeds Dot 5 standards), so I think I'll be sticking with the Castrol.
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ke382TG
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Re: Brake fluid recommendations Thu, 08 September 2005 04:58 Go to previous messageGo to next message
Quote:

Castrol Response Super is ~$10/500mL from Supercheap.



Thats what I have been running, I had no problems at the last track day using this (my car is pretty light though so doesn't work the brakes too hard).

Gave it a good workout a few weeks back and it was fine then too (hills and motorkhana stuff).

Actually it's been the same fluid in the system for just over 12 months now Embarassed I'm a lazy turd.
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kingmick
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Re: Brake fluid recommendations Thu, 08 September 2005 05:02 Go to previous messageGo to next message
austrack motorsport at 109 airds rd minto!i dont know who else carries it. 98204255
mick
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Nark
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Re: Brake fluid recommendations Thu, 08 September 2005 06:23 Go to previous messageGo to next message
Updated the table with the Nulon and Wilwood stats that I could find.

Nulon Xtreme is $8/500mL from Supercheap.

Called up Austrack and these are the prices:
Wilwood 570 is $15/375mL (which works out to be $20/500mL)
Wilwood 600 is $66/500mL

The Castrol and the Nulon are very close in numbers and the Nulon is even cheaper than the Castrol!
I think either one of those two would be my choice. Probably the Castrol for me since I've been using it for years in the Celica anyway.
The rest are a lot more expensive and I doubt I'd need that sort of performance. I'm sure I'll find out if I do though! Very Happy

[Updated on: Thu, 08 September 2005 06:33]

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kingmick
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Re: Brake fluid recommendations Thu, 08 September 2005 07:35 Go to previous messageGo to next message
the wil570 is fine.i have sold cases of it,if it does the job in a state level sportsedans etc etc.the 600 is for stuff like our cars that brake from 300km\h with brembo 12 spotters and soft pads that last a weekend.
mick
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Joshstix
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Re: Brake fluid recommendations Thu, 08 September 2005 08:24 Go to previous messageGo to next message
kingmick wrote on Thu, 08 September 2005 17:35

the wil570 is fine.i have sold cases of it,if it does the job in a state level sportsedans etc etc.the 600 is for stuff like our cars that brake from 300km\h with brembo 12 spotters and soft pads that last a weekend.
mick


I dunno.

Sure I can see that stuff being fine in a race car that gets all the fluids changed religiously but with a wet boiling point of 140 degrees I think it could have issues in a road car. Most road cars don't tend to have the brake fluid changed as often as they should so, I'd suggest something with a higher wet boiling point or a really strict maintainance schedule.

[Updated on: Thu, 08 September 2005 08:24]

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kingmick
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Re: Brake fluid recommendations Thu, 08 September 2005 09:04 Go to previous message
i use ap600
‘Typical’ New Dry Boiling Point in excess of - 300°C (572°F)
‘Wet’ E.R. (Equilibrium Reflux) Boiling Point - 210°C (410°F)

i use the ap600 becuase i have a case of it(it costs between $90-$120 for 500mls from memory),but ive used the wil570 with no problem.change it every 6 months or so.
mick
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