I just installed motul RBF600 and SS braided brake lines, and i already have Ferodo DS2500s on stock rotors. This system is meant to have MUCH better feel/pedal response/early bite, etc ? It feels no better than the stock setup

 

Changing the fluid and lines will not have a noticable change until things get really hot. So if you're comparing before the fluid / lines change to after the fluid / lines change, you probably won't notice anything.

Compared to stock... I'm not too up to date in my info about the Ferodo 2500 pads, but they might be getting into the performance range where they need some heat to really work. If that's the case, they very well may be worse than stock when completely cold.

 

well basically, when i changed my rear pads (before i did the lines and fluid), i cracked open the bleeder screws to allow the piston to retract easily. And i must have let some air into the system, cos the pedal was soooo spongy it was dangerous. Then i got the fluid and lines done, and it wasn't that much better.

Do you think i need to bleed the clutch slave res, maybe some air was let into it either when i did the rear brakes, or when i boiled my fluid some time ago....

 

I'm assuming that when you say you had RBF600 installed, you mean the brake fluid system was flushed / bled. If so, there's no way you should have a soft / spongey pedal. Unless you boiled the fluid after it was bled, then you'll need to at least bleed the brakes again, if not re-flush the fluid.

Something isn't adding up.

I'm pretty sure most people aren't bothering with bleeding the clutch. I know I haven't done that on my car. As long as you keep the master cylinder full enough when bleeding / flushing, you shouldn't have problems from the clutch part of the system.

 

Yes.

I didn't boil it since. it was spongy when i drove it away from the brake place.

But i have boiled my fluid before (i'm pretty sure), and i have let air into the system myself by accident (before the RBF600 went in). Maybe there is some air in the clutch slave res. I got a reputable place to flush the system and put my lines in, why the hell is my pedal so spongy?