KLR CLS

...That they are actually 380mm!!


I am in desperate need of front rotors for my CLS55 with P030 performance package brakes, but I cannot justify the cost of the OEM replacements( @ over $1300 a rotor at local mb dealership!!). It also makes no sense to replace a 2 peice composite brake rotor with both hat and disc, when the hat is perfectly fine, and the whole point of 2 peice rotors is that you can replace the discs seperate. So I have been searching everywhere for someone that makes a 390mm x 36mm Disc under the assumption that MB clearly did not cast their own and must have come from traditional suppliers like Brembo.

I tried everyone, Alcon, Brembo, Stoptech,Performance friction, Gyro Disc. Nobody makes a replacement 390mm disc. That got me thinking that maybe it's cause it doesn;t exist! Sure enough my assumption is correct. I measured the following

Diameter: 380mm
Thickness: 36mm( to outer lip, but a 35mm will do)
Bolt Circle: 258mm
Flange inner Diameter:234mm
Flang Thickness 8mm

All these specs perfectly match Both Brembo an Stoptech Aero Rotors. I will be orering a set or Stoptech rAero otor discs( @ $350 a peice, but waaaaaay better than OEM cost) to replace these and do a write up for DIY types. This is in addition to confirming the pads are standard style 983 pads that you can get from many manufacturers for cheap.

I wanted to post up so any others with P030 Performance brakes know that there are other options because a factory Brake job would be close to 3K for these which is insane. I post up the DIY as soon as I get the new discs..

Pushing_Tin

Good to know, have you tried http://brakeperformance.com/ I've had good luck with them in the past.

guysandiego

that is great news -- too bad it doesnt help me get 2 piece rotors for my E55 for a reasonable price

Good Job

tbal

$1300 a rotor!????? WOW. $350 definitely sounds reasonable compared to that lol

£ C43 £ AMG £

Very comon practice on brake components, the old w210 e55 and c43 AMG shared brakes with BMW 750i




what do you think for less than 200 of your dollars..............for a pair?


http://www.ebay.co.uk/itm/MINTEX-FRO...item4cfa03e563

Yacht Master

Brembo is OEM

shardul

iTrader: (1)

are the calipers on the p030 the same as the e55?
If yes then we can run 380mm?
Stock e55 fronts are 360 and rears 330.

Benz-O-Rama

So, whacha gonna do with all those savings, hmmmmm? Hmmmmm?


https://mbworld.org/forums/wheels-ti...s-fitment.html

KLR CLS

No e55 to compare to but since the pads are the same style as a e55 I beleive they must be the same. The main difference I can see, is the caliper bracket boltiing to the suspension upright is offset more for these rotors. I assume with the right bracket and the 380mm rotors it would bolt on right on.

KLR CLS

The problem their is your car looks so sick with the concaves, I think thats what I need to do aswell.

keith954

I don't think they look as good on our cars as they do on the E's
http://www.vossenwheels.com/CarGalle...VSCV3-552.aspx

pearlpower

Great minds think alike.

320 dreamer

if the hat height is the same for the e55 then a 20mm spacer between the caliper and the bracket to raise the caliper up is all thats needed. prolly need bigger rims, doubt the 18's would clear a 380mm rotor

AMGPilot

Now how are you going to reprogram the SBC for the change? Increasing the rotor diameter is going to change the brake torque values...

komp55

I have Brembo GT BBKs on my car, front and rear. The 380mm rotors clear the 18 rims fine; it's the GT BBK aluminum calipers that don't clear. They're slightly larger than the factory 8 pot Brembo calipers. I've tried fitting the stock E55 rims, the E63 rims, and even the SL55 18 rims. None clear the Brembo GT calipers. If you can fit a 380 disc to the stock caliper, it will definitely clear the stock 18" rims.

Totally unnecessary. A larger disc doesn't impact the operation of the calipers.

AMGPilot

No but it does affect brake balance and brake torque. It has to do with the greater radius.

pearlpower

I have installed big brake kits on well over 20 cars/trucks. Never had an issue and at times it was even better as most factory cars come from the factory with too much understeer for my driving style. Hard cornering with larger brakes tends to counter that a bit-at least for me. AKA Angeles Forest , I'm sure you know it.

320 dreamer

if you had a 360mm rotor which would drop the caliper lower on the spokes would it clear? i wasnt sure and know for my slk32 if i stay with the 340mm rotor my slk55 6 piston calipers can fit inside a 17" rim, but if i went to a 360mm i have to go to a 18" rim

AMGPilot

uh-huh....... big brakes don't change handling

pearlpower

You don't brake when entering a turn at high speed? Balance is everything. More bite on the front allows for more oversteer which allows me to toss the rear end more than stock as the E55 has too much understeer IMO. Your correct that it does affect braking, but for me, it is a positive.

KLR CLS

No changes are required to SBC. Disc annulus is the same, as is contact patch for pads on the 360mm. The increased diameter allows for additional dispersion of heat. No more or less torque is required. The big benefit of these is the reduced unsprung weight from the aluminum hat.

320 dreamer

completely disagree!! i upgraded from 2 piston front/rear 330mm/300mm ate setup to a slk55 6 piston/4 piston 340mm/330mm brembo setup and dropped almost 30 lbs off each side. the difference in handling was easily noticeable

Sher Judge

Yes this is correct

benz_addict

Hey Pete let me know if you need a helping hand with the install I'm in Toronto for the next few weeks

stevebez

P030 were always 380mm's no ? The SL65 is the only one which has 390's as far as I know.

For the 380 brembo GT setup (which is effectiely the 030 package) you need 19" rims.. 18's wont clear the calipers.