anas halouz

hii all i have a mercedes s55 amg fully weistec built the car is 680 hp i need a good front rotor to my car hf anyone can help me

Yuille36

Try RockAuto they should have the rotors that you seek. If not then try AutohausAZ.

cm60k

Do you mean, you want new stock Rotors..?, or something more stronger..??

;-ZAYED;-

anas halouz

No i need something stronger

Yuille36

Well consider this.......https://www.autohausaz.com/pn/219421...SADEgI8_vD_BwE

cm60k

Yeah, "Yuille" is correct, you can go with (OEM/Brembo) 2-piece Rotors, or "RB" Rotors as well..

-;ZAYED;-

Yuille36

The enemy of any braking system is heat, and this especially true on the S55. Now the S55 came with big beefy 8 piston front calipers with solid crossed/vented front rotors.
One would think that these brakes are more than sufficient. But as you brake the weight shifts from the rear to the front, and typically the front brakes apply 70% of the total braking force.
So installing two-piece rotors may solve the situation, as the heat is retained in the friction rings, and not transferred into the hat. So theoretically you should have better braking performance, with less fade.

tw2

Retaining heat (in the ring) does not lessen brake fade which is due to pads operating outside their specified design temperature. 2 piece rotors reduce weight and stop you cooking your wheel bearings. To reduce fade you need more thermal mass, better dissipation or a material that won't fade when very hot like carbon fibre which just accelerates wear rather than reduce braking performance.

PieRat

Im working on this problem too...i was gonna try put an air intake at the front bumper and run a duct back to the rotor, cut and weld a metal intake to the metal rotor shield cover thing to try apply air to the rear ams create a sprinkler affect..

Yuille36

I was under the assumption, that he might be suffering from brake fade, and the two piece rotors are better at dissipating heat then the S55 original rotors.

tw2

How is that? - I mean that in a sincere way. The two piece probably have better airflow through the inside of the rotor but otherwise I'm not sure how they would make a significant difference without altering the factors I mentioned above.

Yuille36

The original post stated that he needed a good front rotors, and the two piece is better than one. Is has better thermal dynamics then the one piece, less weight, and dissipates heat better. What else do you want me to say.

tw2

I'm not attacking you. I have a fairly rudimentary understanding of braking physics and I was interested to learn more as I wasn't aware changing from one to two piece rotors had any significant impact on brake fade or braking performance. If the mass and design of the outer ring is the same then not too much will change. You will however get better handling, accelerating and braking from the unsprung weight reduction. The improved airflow through the bottom of the rotor may make a slight difference in heat loss. You are less likely to warp rotors as they are free to expand separately from the aluminum hat. It is definitely a good upgrade regardless.

Again only for the sake of discussion I believe you either need a large rotor mass, better cooling design or higher temperature rated pads to counter fade. If the fluid is boiling then higher temperature rated fluid also. If there is a 390mm setup available that could help. I will leave it be. And you are correct, the OP has not stated the actual brake performance issues they are facing.

StarvingArtist

I have 280mm P030 two piece front brakes. With EBC redstuff pads they would overheat in cruise control from the computer programming. Even without cruise I think they drag often enough to stay hot and dry. Stock pads stopped the overheating problem, but I can see it in the gas mileage that they are still active without cruise. There is more to these brakes than physics. When they tested a new CLS (2006) on top gear they overheated the brakes from the traction control, with it turned off!

lseguy

ItalianJoe1

SBC does funny things, like constantly applying the brakes a little to be sure the pads are touching and ready to respond.

StarvingArtist

Yes it does! I'm pretty sure the programming is different for the performance package. I wish I could get the programming for a regular one.