no, it was on the evo 9 brakes. the evo x was less. since i needed less braking force for the same stopping power.

 

Yea, I don't see any taper on my pads on my X. They seem to wear pretty flat. Current setup for track is ST47f / ST43r with Torque RT700. Brake pedal was always firm unless I started getting sloppy and lazy on track but even then, next session pedal would be solid again.

Now moving to Prospeed RS683 since Torque didn't know how to run a business. Everybody says the Prospeed stuff is exactly the same, we will see.

 

what was the problem with castrol srf again? good boil resistance, but meh compressability/feel?

 

yeah, srf has high compressibility compare to other top fluid.

http://www.torquebrakefluid.com/comp...ke_fluids.html

I'll give Prospeed RS683 a try once I use up the Torque

 

The higher the compression at high temps the more the pedal compress's, aka mushy pedal, aka bad.

 

http://rs683.com/

the wet temp of the prospeed is much lower than the claimed wet temp of the torque rt700? it's "as bad" as redline as far as boiling temp. i guess if boiling isn't an issue you want to be looking at least compressible though.

http://www.torquebrakefluid.com/comp...ke_fluids.html

^ does it make any difference that the endless fluid in this comparison had 15x more water than the torque or the castrol, or are those numbers still so small that the difference is miniscule

 

Is this even significant? What is the unit of measure here, is this even noticeable in pedal?

Compressibility


Torque RT700 5.19E-05 @ 212 °F @ 5800 psi (400 bar)

SRF 6.487E-05 @ 212 °F @ 5800 psi (400 bar)

 

I would look at the compressibility numbers relatively. They're both the same exponent so SRF is 20% more compressible than Torque. Not sure if that's the right way to evaluate it but that's my thought.

I run RBF600 which according to Torque is a pile of poo, but I also have yet to have boiling issues. I'm sure I'll run int it sometime this coming season though.

 

The source is also a piece of marketing material. The only benefit in my mind over SRF would be if the price were less. But I've only ever heard good things about SRF in my researching.

 

yea would be curious to see if anyone has experienced the difference in compressibility on track, as close to a 1 to 1 comparison as possible

 

Since we're onto a brake fluid discussion I'll jump in....

Ate Type 200 is my go-to. Feels like a really good $/performance ratio. It hasn't let me down on track yet. Bleeding and flushing frequently is much less painful due to cost.

 

i run rbf600 and 660 and it is real good for the price. It does tend to get soft after you overcook it on the track with some hot pads such as carbotech xp12, but then I just bleed a bit of fluid from the calipers and it is great again... cheap too.


I just installed a new set of dba5000 discs and carbotech xp12 pads on a friends e9 and the combo is great.. it is really too much for the winter tires we have on..

 

Yea I've been flushing fluid before every track day. $10 for a pint of 600 definitely makes things easier on the wallet. And I finally got a Motiv power bleeder so bleeding brakes is going to be so painless now.

I'm eventually going to buy some new rings for the pair of fried 5000s I have laying around but I have a couple sets of blanks I need to go through first. Almost $300 per ring isn't the most exciting thought. Earlier this week I was scrubbing the inside of the hats with some scotchbrite since there was some corrosion from the hubs on the mounting surface. Looks like they got chewed up a bit from the corrosion. Has anyone ever run a corroded rotor hat like this? I'm debating having them skimmed with a lathe to make it a true surface again.

 

^ i've never seen that. buy my dba5000s instead!

 

Tempting but money's not in the cards for it right now. GLWS dude