big red/black rotors?
08-21-2012, 03:42 PM
#16
Rennlist Junkie Forever
well, its for the car in my avatar. say 2600 lbs with me in it. call it 350hp, have not dynoed it, but im running a k27/8 at 14psi (23 when I go e85). I plan on getting into club racing, so I have been working on my threshold braking. Although truth be told, im sure compared to someone who actually knows what they are doing, im quite slow.
The main issue im trying to solve is that my brakes seem to have "pad knockback". i.e sometimes I get a soft pedal and catches very late. seems to do it after hard corners. I've bleed and re-bleed the brakes. Replacing the rotors/pads was the next step to diagnosing the cause. Any my rotors are getting pretty worn, so it lead to all these questions. If im going to buy new parts, I might as well know what im buying.
The main issue im trying to solve is that my brakes seem to have "pad knockback". i.e sometimes I get a soft pedal and catches very late. seems to do it after hard corners. I've bleed and re-bleed the brakes. Replacing the rotors/pads was the next step to diagnosing the cause. Any my rotors are getting pretty worn, so it lead to all these questions. If im going to buy new parts, I might as well know what im buying.
TonyG
08-21-2012, 05:45 PM
#17
Rennlist Member
Avoid the X drilled ones for your application. They will crack too easily. The best I've found so far are floating slotteds. Not the cheapest option but you could possibly get some solids and have slots made. That would be the cheaper option.
08-21-2012, 05:55 PM
#18
I have a new set of cross drilled rotors (front and rear) for the turbo S "big black" brakes. I also have a new set of Pagid orange front/Performance Friction rear that works well for track/occasional street use. If interested, PM me.
08-21-2012, 06:39 PM
#19
Rennlist Member
Thread Starter
the pedal never gets soft sitting still, its has to be moving. I dont notice any warping of the roters, or vibration while driving, but the are the rotors and pads that were on the car when I bought it.
I use motul 600 fluid.
08-21-2012, 06:57 PM
#20
Rennlist Member
Thread Starter
what floating slotted do you use?
08-21-2012, 07:23 PM
#21
Rennlist Junkie Forever
I bleed via the brake pedal and a helper. I go back right (outside, inside), back left(outside, inside), front right (outside, inside), front left(outisde, insdie). The process for each valve is "3 pumps and hold brake...open valve, close valve, let off brake" repeat ~3 times per or till no air bubbles are seen.
the pedal never gets soft sitting still, its has to be moving. I dont notice any warping of the roters, or vibration while driving, but the are the rotors and pads that were on the car when I bought it.
I use motul 600 fluid.
the pedal never gets soft sitting still, its has to be moving. I dont notice any warping of the roters, or vibration while driving, but the are the rotors and pads that were on the car when I bought it.
I use motul 600 fluid.
TonyG
08-21-2012, 09:02 PM
#22
Rennlist Member
08-22-2012, 11:24 PM
#23
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The main issue im trying to solve is that my brakes seem to have "pad knockback". i.e sometimes I get a soft pedal and catches very late. seems to do it after hard corners. I've bleed and re-bleed the brakes. Replacing the rotors/pads was the next step to diagnosing the cause. Any my rotors are getting pretty worn, so it lead to all these questions. If im going to buy new parts, I might as well know what im buying.
Taylor
08-23-2012, 12:57 AM
#24
Rennlist Member
Thread Starter
got one on order. been meaning too anyways. What about cycling the ABS, I've heard its possible to get air in those lines. I cant seem to find any info on how to cycle the the pump tho.
