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Brake Fluid

Malz34
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/2on Proficient

/2on

Posted
Posted

What are you using the car for? track or street? if track my pick would be Motul RBF 600 if your cars a streeter then any dot 4 or super 4 fluid will be fine :) personally id go the motul for that too cause they make quality sh## you will also need two 600ml bottles to flush all your brakes and you might have enough to do you clutch if you wanted to do that to :)

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gslrallysport Experienced

gslrallysport

Posted
Posted

The best stuff that we've used in both the rally car and road car is the Lucas RBF600. I went away with the Motul because, its not compatible with other grades of brake fluid, so if you use the Motul, you have to keep using it. This might be ok in a road car, but at a rally, when service park is miles from your nearest autobahn, it was a problem if you expectingly had to play with the brakes, and didn't have spare fluid.

The performance is easily as good as either the Motul or Castrol, and so we've stopped stocking the Motul, and now only keep the Lucas. $55 for a 1L bottle puts it pretty much on part with the Motul for price too. Its also fine just for a street car, so we now sell very little Dot 4 or 5.1 now... Its brakes, its a fraction of what a car or brake upgrade costs, so we've talked most people into using it, and all have been appreciative...

Had a little bit of a discussion on it here:

http://www.astinagt.com/forums/showthread.php?t=8264

Cheers,

Greg

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weeman1 Collaborator

weeman1

Posted
Posted

what temperature is the 5.1 stuff usually rated at on average, thats what i have in my car, i took it down to wakefield on the weekend and once i got used to the track i started really using the brakes. after about 3-5 laps, cant remember, my brake pedel started going right to the floor cause i over heated the brake fluid. now im after a higher boiling point fluid so might try that lucas stuff.

just wondering cause i must have heated the fluid up heaps for that to happen with that grade fluid

would love to hear what you guys have to say

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/2on Proficient

/2on

Posted
Posted (edited)

When was the last time you changed your fluid? im pretty sure if my memory serves me correctly the higher the DOT rating the faster the fluid will absorb moisture therefore needing to be flushed more regularly because 5.1 has a higher boiling point then your standard 4 or or super dot 4 i think the dry boiling point for it is around 270C so it might have just been old fluid

Edited by /2on
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R.C Enthusiast

R.C

Posted
Posted

I used Nulon "Xtreme" super dot 4. Wet boiling point 184 deg C, Dry boiling point 286 deg C. The specs were nearly identical to Castrol Edge

bled the whole system dry, replaced and bled with one 500ml bottle which was suprising - now I have 2 spare bottles! Have not faded street or track (very cheap too only about $7 a bottle).

Wouldn't bother paying for racing fluid for street use, but feel free if you need something to spend your money on.

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