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c63 amg going on a sl60 amg

Upgrading just the calipers, discs & pads will have very little effect. If you want the brakes to feel better you will need a bigger master cylinder and also some upgraded hoses to allow more brake fluid volume.
You will be trying to apply a larger surface area of friction with the same amount of fluid pressure...

If you come back and say these brakes have transformed the stopping power of my car then its pure proof of the placebo effect. (or you have inadvertently fixed whatever issue you have at the moment)

p.s. My 500E has R129 brakes as standard from factory and I also think the feel isnt really that great...
 
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well ive got braided hoses that i ordered but they were for the sl60 amg wont they be just as good its only a pipe. Also what master brake cylinder will i need to upgrade to? Anyone know, as i might aswell go the whole hogg.
 
Well ill see if it all fits together, if so ill have sl60 amg full brake set for sale soon.
 
biturbo said:
well ive got braided hoses that i ordered but they were for the sl60 amg wont they be just as good its only a pipe. Also what master brake cylinder will i need to upgrade to? Anyone know, as i might aswell go the whole hogg.
Click to expand...

See what amount of pedal travel you get with the existing master cylinder. It may do the job




 
With so many conflicting opinions ill just suck it and see. I have specialist indi and he can advise me. Thanks all.
 
Howard said:
Oh go on ...... please .....
Click to expand...

Ok, if you insist...

The brake only needs to serve one function, to apply enough retarding force to the disk to lock the wheel. Once the point of locking is reached there is no advantage applying further force. It also needs to do this a number of times before brake fade sets in.

All cars built in the last ...umm 70 years or so have been able to lock the wheels, so that isn't an issue, brake fade can be, but shouldn't be a problem on the road.

Why do some cars have bigger disks and greater friction material area?

High performance cars, used aggressively may suffer brake fade so have larger disks to accept greater heat soak, however this comes at a cost to overall performance because the mass of the disk is greater. In addition larger wheels then may be required to clear the calliper.

Now remember the Kid's gyroscope.
Greater unsprung mass will negatively affect ride, handling and steering ability due the mass not being able to change direction or rotational velocity as readily as a lighter unsprung mass.

As all cars have the ability to lock the wheels then there is no greater braking force available, but by fitting callipers with greater piston area one could cause the master cylinder to run out of travel and if upgrading front brakes only, will definitely affect brake balance, which could lead to more braking effort being on the front wheels and less than normal on the rears. This could actually reduce overall braking force.

If one is suffering brake fade then the brakes aren't being adequately cooled, so add cooling ductwork to overcome this.

Large brakes slow cars down...period. Ye canna ignore the laws of physics Captain...

These Guys seem to explain it rather well.

TOPGEAR Desafio Renault AVANTIME vs Mitsubishi EVOLUTION by javierel22 on Vimeo

Big brakes do look good though...
 
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well its not about the looks. They are behind AMG alloys from the 90s you cant see the calipers or discs.
I only bought them sat. Might ring them up and cancel it spend the money on another upgrade. Might get the sl320 discs fitted as this might improve performance and handling and all brakes lock.
 
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If the brakes aren't locking the wheels they are faulty so get them stripped and fixed first and check the servo vacuum.
Next do all the suspension bushes and fit new springs and dampers to give the car back the balance it had from new, or upgrade the suspension for overall better handling.

I suspect after that you won't need better stopping ability.
 
Calipers for high performance cars are nowadays made of aluminium and weigh about the same, if not less, than those from the 90's. Times moves on, so does technology.

To see if the master cylinder is going to handle new brakes, one can measure up the piston area of both calipers. If the numbers are not much different, all should be OK.
 
Alx said:
Calipers for high performance cars are nowadays made of aluminium and weigh about the same, if not less, than those from the 90's. Times moves on, so does technology.
Click to expand...

and the iron disks?
Technology may move on...if making things from aluminium is considered a new thing...but physics laws are pretty fixed...
 
Dieselman said:
and the iron disks?
Technology may move on...if making things from aluminium is considered a new thing...but physics laws are pretty fixed...
Click to expand...

Two piece brake discs are lighter than their cast iron counterparts. Disc hat is almost always made of aluminium too.
 
I doubt there will be a real-world difference at anything less than 70 mph.

You can get better track-day cars than your SL.
 
Its not a track day car. When did i say it was that? Never realised a normal car could lock its wheels at 70 mph though.
 
biturbo said:
With so many conflicting opinions ill just suck it and see. I have specialist indi and he can advise me. Thanks all.
Click to expand...


Thats the spirit!! sounds like the perfect plan!

you might have a problem with the brake discs off set. I think the R129 sl60 AMG has an offset of 50.5mm and the C63 has an off set of 64.5mm, so thats a fair bit of inward movement.

The C63 brake set up will actually be lighter than the OEM SL60 set up.

330x32 vented steel disc weighs 11 kgs approx and a 2 piece disc with aluminium hat will weight approx 7-8kgs.

4 pot steel calipers from the SL/W124/EVO2 weighs 7kgs, again! you should see a decrease in component weight.

I think some one brought up the "handling" issues..and its good that they did. You might find that the extra braking can mess up the front/rear and corner/corner suspension balance.

you wont know any of this till you have tryed it...SO go for it, give it a go.

good luck

mazza
 
Unless there is a room for caliper, brackets may have to be made from the scratch. Any competent shop will be able to answer all the questions and do the conversion. I can recommend shop in West Midlands that did mine. OP, pm me if you need help.
 
I'll have to agree with most people here... an SL60 should have plenty of stopping power, although the brakes may not 'feel' as great (most old mercs had that soft braking feel), I noticed this when I changed to a BMW, much sharper braking feel but overall I doubt it stops much more than a merc of equivalent spec, there might be a few feet in it, from 100mph in total.

If you want to measure gains, just emergency brake (on a clear open road of course) from a high speed and see approximately how long it takes to stop, then try again when you've upgraded, the difference will be almost negligible, especially when u consider how much it cost you to do it
 
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