Hi everyone, my S2000 is a 2005 AP2 with stock calipers and slotted rotors in front, stock rear rotor. I run Carbotech XP10 front and XP8 in the rear. I have stainless steel lines. I use Motul RBF600 fluid. My front brakes have air ducting. Hankook Ventus RS3 255 square setup.

My car's brakes seem to grab late (moderate pedal track and not super firm) and as the track day goes on it seems the brakes are fading or take longer to warm up during the session for full bite (like last 2 sessions).

I always thought maybe I have air in my ABS system which is hard to bleed out. But I also thought maybe the S2000 has a "soft pedal" stock compared to when I use my dads Porsche 911 carrera brakes which are rock solid (very little pedal travel for full bite). I would like my s2000 brakes to be like that since it inspires a lot of confidence but never had that feeling and I replace the brakes every year and flush prior to events.

I have been thinking is it my brake fluid (Motul RBF600) that is heating up with each session. I wanted to try using the Castrol SRF racing brake fluid since it is the best and has very high dry/wet boiling temps. Even though my rotors cool down after the session I do not know if it is the fluid that is getting very hot and absorbing water or something. Anyone in a similar situation try the Castrol SRF fluid and the brake fade was no longer present at end of day track?

Any thoughts on fluid or should I try to bleed the system in a different way. I have done both gravity and pedal bleeding. Or is the brake pads. Trying to get my brakes more solid so I have more confidence on track.

Thanks.

 

better pad

 

Agree - that sounds like pads. fluid fade usually means mushy pedal but still good stopping distance. pad fade usually means longer stopping distance.

 

What kind of tires are you on?

 

I have Hankook Ventus RS3 255 square setup.

 

Should I upgrade to Carbotech XP12 in the front or go with different company? I was seeing the Hawk DTC70 or PFC08/11 may be a good choice as well.

 

I am approaching a similar point running gloc 10/8. The reading I've been doing suggests it's time for a pad upgrade and was looking to go the route of PFC. Of course it's only reading and I broke down and bought another set of r10s cause they were in stock and needed to be ready for next weekend. Maybe next year....

 

I've run the RBF600 and RBF660 fluids. I've run those Carbotech pads and Project Mu.

I've bled my brakes many times. I've never had what I would call a rock solid pedal like in a Porsche or similar sports car. I think it's just out car.

 

Change pad and fluid. PM me with your setup and what course you're running.

 

I like all your plans. I'd switch to the Castrol SRF. There are guys racing on that fluid and never even bleeding it. I would also switch to the PFC pads and I do prefer the endurance 08s when they are an option.