M3 CSL to 328i Sport (New Steed)

[mattCSLnut]

Hi,

The standard M3 CSL Disc are more than up
to the job, and at just 28mm thick you save
some weight as opposed PF, AP or Brembo at
32/35/36mm thick, about a kg a disc.

What you require is some 'Radial' Mount Calipers
either 4 pot or 6 pot that take a 28mm x 345/350
disc.

Porsche Brembos, 996,997 rears, BMW 850,
or something like a pair of Compbrake 6 pots
or Hi Spec 4-6 pots.

http://www.compbrake.co.uk/CALIPERS/CALIPERS_COMPB6_PRORACE6.html

http://www.hispecbrake.co.uk/calipers/M6%20Rad%20360.htm

Brackets would be around 80-100 each so for
under a 7/800 you can have a 4 or 6 pot set up
running your standard CSL Discs.

I am surprised that nobody ever did just a
Radial caliper kit for the E46 M3/CSL as
by spacing a radial caliper off the mounting
brackets you could have coverd
both disc sizes on both models etc
and retained standard front discs.

As 70/75 % braking effeciency is front
bias, then std rears with s/s lines good
pads and a rear balance valve mounted
in the cockpit for wet days etc, would
give all the brakes you would ever need
for a Trackday car.

Regards,

The Gorilla.

Top man... THANX for your insight. This is something I'm seriously considering as I've had GREAT! experience with BREMBO callipers in the past.
I think the reason no one did the Radial calliper kit for the E46 M3 /CSL is there's probably not enough money to be made out of it over , lets say AP Racing or Alcon BIG brake kits.

Any tips on who would be the best supplier of the before mentioned brackets ?

[phat///M3]

Congrats on the new car Craig, I love e36s and this one looks like a great example.

[The Gorilla]

Hi,

MattCSLnut- www.BGdevelopments.co.uk
can make up Brake Caliper Brackets, or
Try www.Movit.de as they use to offer
Brackets for fitting Brembos to many
applications.

www.300mm.de also offer differing
BMW Brake combination applications.

Compbrake make Caliper Brackets, as
will your local CNC Shop with a sketch.

Its quite easy to work out once you
have the Calipers, and final disc size.

Surprised that somebody does not manufacture
a Standard caliper bracket with the holes drilled
for the hub centres, but left blank for the
caliper radial centres.

This would be for the std 28mm thick discs.

You then have brackets drilled and tapped
to suit your Caliper spacing etc.

Would allow several 4/6 pot 28/32mm radial mount
calipers to be fitted, while allowing them
to be quickly removed and removed to stock
for selling the car.

Regards,

The Gorilla.

[alexk]

The car is very nice Craig :beer:

[mattCSLnut]

Hi,

MattCSLnut- www.BGdevelopments.co.uk
can make up Brake Caliper Brackets, or
Try www.Movit.de as they use to offer
Brackets for fitting Brembos to many
applications.

www.300mm.de also offer differing
BMW Brake combination applications.

Compbrake make Caliper Brackets, as
will your local CNC Shop with a sketch.

Its quite easy to work out once you
have the Calipers, and final disc size.

Surprised that somebody does not manufacture
a Standard caliper bracket with the holes drilled
for the hub centres, but left blank for the
caliper radial centres.

This would be for the std 28mm thick discs.

You then have brackets drilled and tapped
to suit your Caliper spacing etc.

Would allow several 4/6 pot 28/32mm radial mount
calipers to be fitted, while allowing them
to be quickly removed and removed to stock
for selling the car.

Regards,

The Gorilla.

Craig, SORRY for hijacking your post m8 but I have a further question for Mr Gorilla ( I'll start a fresh thread after this )

I have these "BREMBO" 4 pot callipers to fit onto my CSL. They are Porsche 928 S4, 968 CS, 911 (993 & 996 non Turbo) + Boxter 3.2 fronts. These are 25% bigger in overall size then the previously mentioned rear "BREMBO" callipers. The disc width spacing is 35 mm (as per pic 2) between the pad retaining clips... is that too much or is that OK ? Do U know if (with an appropriate custom brackets) these will fit over the CSL standard front discs ? THANX in advance :beer:

[Craig]

If the width is too much you can just split the calliper and machine it down. e46 discs are 28mm wide I think, or is it 30mm so it shouldn't be too bad but if it is, things can be altered.

[phat///M3]

If the width is too much you can just split the calliper and machine it down. e46 discs are 28mm wide I think, or is it 30mm so it shouldn't be too bad but if it is, things can be altered.

Either that or there are small plugs made by Brembo that fit inside the pistons that compensate for a thinner disc.

[mattCSLnut]

If the width is too much you can just split the calliper and machine it down. e46 discs are 28mm wide I think, or is it 30mm so it shouldn't be too bad but if it is, things can be altered.

Hi m8.
Apparently, splitting these calipers into the two halves that they are made of, renders them useless :whistle:

[mattCSLnut]

Either that or there are small plugs made by Brembo that fit inside the pistons that compensate for a thinner disc.

That sounds interesting :whistle: Any web linx ?

[phat///M3]

That sounds interesting :whistle: Any web linx ?

Nope sorry, I just know they make them as they come with their 4 piston rear caliper kit as that uses the orignal BMW disc (which I believe is 28mm) and the same caliper is used on their rear 345mm discs kit without the little spacers.

[The Gorilla]

Hi,

MattCSLNut- if your going to use those
Brembo Calipers, on your CSL, then you will need
to locate some 'thicker' pads which is
sometimes an option, or if the tolerances
allow, some 'Pad Spacers'.

Thin metal plates that fit between the
caliper pistons and the back of the
Brake pad, usually the same shape
so they work same as the pad does on
the lugs or pins.

If they are for a 30mm disc then you can
run them on a 28mm disc as the caliper pistons will
not 1mm per side critical when fully extended.

If there for a 32mm disc then check the
piston length.

A lot of Brembos are Cast, so you are
not able to split them.

What sizes are the pistons in those calipers ?

And do they mount as a Leading or Trailing
Caliper, as you require the smaller piston
before the larger, when mounted as the CSL runs trailing
calipers.

Regards,

The Gorilla.

[Craig]

Wonder why you can't split them, I did notice the bolts were very small compared to the likes of the 840ci callipers which can be split. Also learn something new every day, didn't know Brembo made piston plugs for spacing issues.

[cslgirl]

Very nice :thumbs:

Useless information of the day - (I think) cars ending in a DL were registered here on the isle of wight (before 2001)!

[mattCSLnut]

THANX for the ever useful info Gorilla :thumbs: ... I'll measure the pistons and let U know :beer: BTW, I've started a fresh thread about this so for the benefit of others, maybe we should continue with this topic, on there. :thumbs: Link below

https://nam3forum.com/forums/forum/csl-register/general/csl-technical-area/510628-porsche-brembo-4-pots-for-the-csl

Hi,
MattCSLNut- if your going to use those
Brembo Calipers, on your CSL, then you will need
to locate some 'thicker' pads which is
sometimes an option, or if the tolerances
allow, some 'Pad Spacers'.

Thin metal plates that fit between the
caliper pistons and the back of the
Brake pad, usually the same shape
so they work same as the pad does on
the lugs or pins.

If they are for a 30mm disc then you can
run them on a 28mm disc as the caliper pistons will
not 1mm per side critical when fully extended.

If there for a 32mm disc then check the
piston length.

A lot of Brembos are Cast, so you are
not able to split them.



What sizes are the pistons in those calipers ?

And do they mount as a Leading or Trailing
Caliper, as you require the smaller piston
before the larger, when mounted as the CSL runs trailing
calipers.

Regards,

The Gorilla.

[Rags]

Yep, good to meet U too m8 and put a face to a name :thumbs: U bird killer Shame U didn't bring your CSL with Ya :whistle: No m8, not pissed off at all as the brakes were fine. Before U arrived I had a 20 minute non stop, flat out, Instructor laps and they were working great, without fade, if anything the brakes needed a lap to warm up :hahaha: (the pads however, as great as they are, are at the end of their life now) They were 30% worn when I bought the car in October and have since done two TDs and over 2000 miles. I've ordered another set of the same, Performance Friction "Z" rated TD pads front & rear, all for a grand total of £140 delivered :thumbs: That's what I call a bargain.

http://www.part-box.com/performance-friction-pads-discs-bmw-m3-c-968_1058_1059.html

They are really superb, in conjunction with the braided houses and Racing Blue brake fluid. I'm just a little concern that as I build up speed & confidence in my CSL and as the ambient temperatures rise, I may need extra braking power come May/June time. I'm just thinking ahead and out loud about a simple solution that doesn't cost thousands £££ or require heavy modifications. I personally think the OE CSL discs can take the heat, however the OE callipers will start to complain, even with the PF pads, so a BREMBO four pot callipers, like the ones from the Porker 928 I think might do the job. :whistle: Over to Mr Gorilla

That was a some blood, sweat and tears fitting those genuine discs, PF pads, Superblue and braided hoses:hahaha::hahaha::hahaha::hahaha: