Steve Richo

Just fitted a set of Giro disc rotors, F&R to the 63, courtesy of Tal at ACG.

Read all of the hype but.........the car really does feel better, turn in, acceleration off the line not to mention braking performance with the Endless MX 72 pads!

I honestly took any improvements with a pinch of salt but no more, it is measurable from the drivers seat.......I am really impressed! Richo

James@ACG

Thank you for the great words, glad to hear you enjoying them

jrcart

I assume you are talking about 2-peice rotors? They are significantly lighter than a solid 1-peice rotor. Any time you can reduce rotating mass the gains are big, sometimes significant. So significant that very lightweight rotors will usually show a couple HP gain on a dyno as well. Obviously they are not making more hp, they are simply freeing up hp tied up in driveline loss.

Enjoy your new rotors!

ParkerK

Any more details on this mod? Along the lines of the actual weights of the rotors etc compared to stock? Reducing unsprung weight is one of the best mods you can make...

Are these 2 piece, floating?

Any noise increase? Not in brake application but the rotors themselves - floating rotors are usually a little on the noisy side.

Thanks -

charliekay

Girodisc were the manufacturers of the Evosport Rotors, just had them branded Evosport.

All the info is here - https://mbworld.org/forums/c63-amg-w...otors-c63.html

If you have the P31 (OEM 2 piece) rotors the weight saving is a little less than the standand 1 piece rotors. 26lbs vs 40lbs.

They are a direct replacement and a great piece of kit. No noise and great stopping power.

They come in 2 options, drilled, and drilled and slotted. Not sure which one the OP got.

Charlie

Steve Richo

The discs are 2 piece, alloy hats, I went for slotted only I thought deleting the cross drilling did not have a great negative impact but removed the potential cracking around the holes.

Yes, this is not about additional horsepower but a reduction of rotational inertia and unsprung weight, to be honest I was really surprised at the improvement. The whole set up is OEM quality, zero noise, I mean zero! Brake dust seems non existent at the moment (obviously it is there as the pads wear but is not evident). The difference in weight is about 14 pounds per side (front axle) can't give exact figures but it is about that.

James and Tal were great help putting up with all my queries, I can't thank them enough.

aussie e55

hi steve what pads are u using thanks

Steve Richo

They are Endless pads MX72 (EIP190MX72), I don't think you would be disappointed using these. Steve

aussie e55

thanks steve have been looking for low dust pads that stop & do not squeak yours may do the job ? regards.

ivelina_87

http://mercedescls63amg.com/mercedes...mg-ecological/

Merc63

Will the giro discs bolt to OEM hats?