Request for discussion: 500E brakes and brake upgrades - Page 3 - PeachParts Mercedes-Benz Forum

Michael · #31 03-23-2002, 10:17 PM

Guido/Al:

I prefer slotted vs drilled, unless the drilled holes are cast in. And regardless, I think it's worth cryo-treating your rotors as it will improve durability.

I've attached a picture of an E500/SL600 320 mm caliper next to a 500E/500SL 300mm caliper (in black)

I hope these things work well-as I understand, they can offer about 20% more braking force (although both setups can exceed the grip of street tires) so maybe I'll benefit on the track with slicks; I do like the notion of increased mass (rotor) for heat dissipation

ke6dcj · #32 03-23-2002, 10:22 PM

Michael- can you post the pads of the 600SL calipers vs. the 500E's ?

I heard they have the same surface area.

BTW- someone mentioned running some cooling ducts to the 500E iron calipers for better fade resistance. . .

Michael · #33 03-23-2002, 10:27 PM

Neil-

I have both-same pad shape, same OE MBZ composition (textar somethingorother), but different shims and less braking material on the later E500/SL600 pads, which run quieter

And I'm among those trying to figure out how to run cooling ducts-will keep you and all apprised

#34 03-24-2002, 02:09 PM

Here you go Neil,

E500/500E brake cooling idea
Before you race your 500E...
Woohoo! bought "trick" 500e yesterday...............

Boy, I wish I was in a position to mod the 500E!

Michael · #35 03-24-2002, 02:09 PM

And for the record, here's what a 500E/500SL iron caliper 300mm setup looks like:

mbsteve · #36 03-24-2002, 02:27 PM

Michael,

Sounds like a winner - I'll follow your progress closely. My 94 has the SL600 set up front and a ventend solution on the rears (are these fronm a 600 as well?).

Are the front rotors your having slotted and cryoed OE parts?
How about the rears, are they vented like mine?
Lastly, how did you decide on the slotting solution? (I know cross drilling is bad but how do you locate the slot and what shape?)

My plan is to follow your lead with the appropriate modidfications. Start with cryoed rotors front and rear, update pads to either EBC or Textar (I like the idea of the Textar), add the SS lines and see what happens.

Michael · #37 03-24-2002, 02:48 PM

All 500s had internally vented rears of the same diameter. They are up to the task of any road driving, and just about anything short of endurance racing. I've chosen to slot and cryotreat mine-slotting mostly to match the front, and cryotreating 'cuz I'm convinced it increases longevity and durability. Alcon thinks so too, and they do some pretty nice brake setups

For track use I plan to run Porterfield pads at the rear; nobody else appears to make a composition for the rear brakes that exceeds 450C except for Porterfield and maybe Carbotech-the Mintex C-tech pads don't come in their highest heat range, which we require with such heavy cars.

mbsteve · #38 03-24-2002, 03:01 PM

Thanks for the inputs. Hopefully when I'm ready to ge for this I can get your machinist to consider doing mine the same as yours.

Michael · #39 03-24-2002, 03:10 PM

BTW, I'm trying Zimmerman German-made rotors supplied by the guy doing the slotting-saved $25/rotor going this way. Seem very nicely made, and have fairly intricate cooling webbing cast in-they look really strong.

If they hold up poorly, however, I'll slot and cryotreat MBZ rotors next time.

And FYI he saved the program on the CNC machine, so can do a set anytime

and can ship them

www.eurobraketech.com

However, based upon how mine look you may want a different design-the alternating half-length slots look funkily non-centered, which is an optical illusion I'm not certain I'm married to

http://www.eurobraketech.com/rotor.html

mine look like the one in the center. I'll post a picture in situe as soon as I get the rotors back from cryotreating, maybe Wed.

ItalianBenz · #40 03-25-2002, 11:06 PM

Hey Mike. How much does Cryotreating cost,who does it. Anyone local here in southern you can refer me too?

Guido

Michael · #41 03-26-2002, 06:32 AM

Guido,

Cryo-treating typically costs $30-$35 per rotor. I don't know anyone on the west coast, so perhaps try a search on an engine like Google?

run.exe · #42 03-26-2002, 02:01 PM

http://www.frozenrotors.com

Michael · #43 03-26-2002, 04:22 PM

BTW, I weighed the calipers-the 500SL weighed in at 10 lbs 3 oz, the 600SL were exactly 3 lbs more each. So, not a huge weight gain there, but we'll compare rotors when I get them back

ke6dcj · #44 04-02-2002, 07:20 PM

Here's some pics of the WilWood rotors vs. the stock 500E rotors (not 600SL rotors). I have not installed them, yet . . . I'm developing the adapter plate.

The WilWood rotors are directionally vented.
The calipers (Dynalite III's)are only 4.4-lbs each vs. 10.3-lbs for 500SL and 13.3-lbs for 600SL calipers.

I haven't weighed the rotors, but they MUST weigh more. They are cast-iron with an aluminum hat.

These came off the C36 donor car for the wagon.
FWIW, the C36 came with 600SL calipers & rotors, but MBUSA thought they needed something with more fade resistance for the FIA Medical car.

BTW- anyone have a used 400E/500E front hub so I can do some testing & measurements (currently using a production car)?

:-) neil
1988 360TE AMG
1993 500E

Glen · #45 04-02-2002, 08:57 PM

Neil:
That's a BIG rotor!

Is it 14"?

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