Big BREMBOs ?

[mattCSLnut]

Are these the Worlds largest BREMBO callipers ever ? :119:
Spotted these while visiting my local L.R. Dealer recently, attached to the brand New R.R. Sport with 21" wheels. The callipers themselves looked like they were in excess of 30 cm in height (12 inches for you Imperialists) ;) They looked positively Mahoosive !!!

[shane@mbtech]

Look similar size to gran turismo kit

They look like 380mm

Not povo efforts like some put on their csl from gay boxsters:gayfight:

[AlexGTT]

Look similar size to gran turismo kit

Not povo efforts like some put on their csl from gay boxsters:gayfight:

:smt064:smt073:smt031

[mattCSLnut]

Look similar size to gran turismo kit

They look like 380mm

Not povo efforts like some put on their csl from gay boxsters :gayfight:


Nowhere near similar ... I've seen that 380 mm GT kit and these look so much bigger, there's no way a 19" wheel would go over these & spin freely.

BTW I like my povo boxter BBK sweety :gayfight: it works :finga:

[sjb]

I saw those Brembo's too the other day in our local Land Rover garage whilst the wife's Evoke was being seen to..... those Range Rovers weigh near as dammit 2 tons don't they? Not surprised they need calipers that big :wink:

And I'm another lover of these gay Boxster calipers :finga: :-D


http://img.photobucket.com/albums/v709/shawn63deluxe/photo313.jpg

Plenty big enough for a 1400 kg car :wink:

[alexk]

They are very big.

Also the bespoke brembo calipers for the m5/m6 are massive (if not bigger).
My m5 has the "stock" 400x36mm brake discs :)
Aprox. 13.5kgs each disc.
The braking power is fantastic.

[mattCSLnut]

They are very big.

Also the bespoke brembo calipers for the m5/m6 are massive (if not bigger).
My m5 has the "stock" 400x36mm brake discs :)
Aprox. 13.5kgs each disc.
The braking power is fantastic.

I bet :smokin: 400 mm front discs !!! :supz: That's bigger than my MK2 Golf GTi BBS RA 15" wheels :119: :notworthy:

[shane@mbtech]

Nowhere near similar ... I've seen that 380 mm GT kit and these look so much bigger, there's no way a 19" wheel would go over these & spin freely.

BTW I like my povo boxter BBK sweety :gayfight: it works :finga:

9549

[shane@mbtech]

They are 380mm on the new rr sport supercharged beastie

[mattCSLnut]

9549
Naaa... there's only a rusty shopping trolly at the end of that line :wink: you can't get me that easily :smokin: I know what Yer like :hahaha:

[shane@mbtech]

They're 380mm discs though Matt :supz:

[mattCSLnut]

They're 380mm discs though Matt :supz:

That may be so... but I'm talking about the BREMBO calipers being Mahoosive in size, not the size of the discs ;)

[shane@mbtech]

Looks like more than 1" gap between caliper and the 21" wheel which means a 19" wheel would fit if so.

[shane@mbtech]

Looks like more caliper clearance to wheel on rr than on gt kit with same size 380mm disc

9552

[The Gorilla]

Hi,

Now these are ''Proper Brembos''.

ttp://www.racecarsdirect.com/listing/51750/set_of_4_brand_new_brembo_calipers_xa8j101_xa8j102 .html

Regards,

The Gorilla.

[shane@mbtech]

Hi,

Now these are ''Proper Brembos''.

http://www.racecarsdirect.com/listing/51750/set_of_4_brand_new_brembo_calipers_xa8j101_xa8j102 .html

Regards,

The Gorilla.

If you did "proper link" we might have a chance to view :supz:

[sjb]

http://img.photobucket.com/albums/v709/shawn63deluxe/6pots.jpg

And now for my next project :smokin:

Front GT3 CUP calipers, 28/32/38mm pistons
360mm E9x front discs


And for the rear

Rear brembo GT3 calipers 28/30mm pistons
350mm E9x rear discs

Refurb (with brembo decals), Rs-29's and a full rebuild kit, time to re-mortgage the house :whistle:

Original parts to be kept in a box for the future when the CSL's are worth £60k+ for nice original examples.....

[Equinox]

Ill be very interested in seeing those 6 pots when they have had a re-furb, they look a bit battered now. Whats the project ?

[sjb]

Ill be very interested in seeing those 6 pots when they have had a re-furb, they look a bit battered now. Whats the project ?

They only have surface battle scars to be honest and split dust seals, they look worse than they actually are. I refurbished my current 4 pot brembos and it's not too much hassle doing it yourself.

http://img.photobucket.com/albums/v709/shawn63deluxe/photo58-2.jpg

http://img.photobucket.com/albums/v709/shawn63deluxe/photo57-1.jpg



The project is to get the f*ckers fitted and working on my CSL :thumbs:
If the Yanks can do it.....although they machine down lug fitment Cayenne 6 pots due to the GT3 6 pots rarity.

[Equinox]

They look like brand new calipers, look amazing youve done a top job there. So if a Cayenne 6 pot is machined down I guess they dont need a bracket to fit with a CSL disc ? Any further info that you know. I know 2 People that have retro fitted Lamborghini Gallardo Yellow calipers to a CSL with Performance friction rotors which look stunning although i guess with that conversion you have to forget cost and just go with the fact it looks amazing.

[sjb]

Cheers. The machined Cayenne calipers still need a bracket to be made up when they are converted from a 'lug' mount to radial. Even though they are originally lug mounted like our standard CSL calipers they are miles off and impossible to fit in that way, it's got to have the 'lugs' or 'ears' machined off and brackets used to fit them, it's just that the GT3 ones are already radial mount and don't need the expensive and potentially risky machining work to convert them.
Here's the main thread on there concerning this particular set up (from page 7).


http://www.m3forum.net/m3forum/showthread.php?t=420496&page=7


The guy p0lar is the man when it comes to machining (he supplied his rear brackets for a big boxster caliper group buy on cutters). He has worked out a massive amount of different set ups to take into account keeping the brake bias correct with these 'DIY' redneck conversions :-D

[mattCSLnut]

The guy p0lar is the man when it comes to machining (he supplied his rear brackets for a big boxster caliper group buy on cutters). He has worked out a massive amount of different set ups to take into account keeping the brake bias correct with these 'DIY' redneck conversions :-D

:hahaha: Let me hear Ya say... Hell Yeah an'a Yeeeee Haa :-D

[shane@mbtech]

The gt3 6 pots are only about £300 per caliper. Factor in discs, pads and brackets and I reckon it's doable for cheaper than the AP kit.

[sjb]

How about £460 per pair ? :beer:
Of course it does help that the dopey eBay seller spelt 'Porsche' 'Porche' so he limited his audience a little there :clown:

The only other gt3 calipers about are on eBay.de for €900 and they also need refurbing. There's a joker from Hungary trying to get £1100 for a set of front and rear gt3's.
Eurocarparts are doing German E9x M3 discs for £532 for 4. RS-29's are £340. A friend of a friend will media blast and powdercoat them for peanuts and an old machinist guy friend will do the brackets for £20 (everything he does for me is £20!!!)
Something a little different from the usual AP kits if you like a bit of tinkering in the man cave. Which I do !

[shane@mbtech]

How about £460 per pair ? :beer:
Of course it does help that the dopey eBay seller spelt 'Porsche' 'Porche' so he limited his audience a little there :clown:

The only other gt3 calipers about are on eBay.de for €900 and they also need refurbing. There's a joker from Hungary trying to get £1100 for a set of front and rear gt3's.
Eurocarparts are doing German E9x M3 discs for £532 for 4. RS-29's are £340. A friend of a friend will media blast and powdercoat them for peanuts and an old machinist guy friend will do the brackets for £20 (everything he does for me is £20!!!)
Something a little different from the usual AP kits if you like a bit of tinkering in the man cave. Which I do !

I meant brand new. ;)

But if you refurb them for less than £140 you are quids in.

[sjb]

I meant brand new. ;)

But if you refurb them for less than £140 you are quids in.

£300:drool: Care to share where that price comes from??? I will buy a few pairs if that's the real price to the average man on the street. If they are available new for £300ea I will buy a pair or two and get these back on ebay for an easy profit :wink:

To purchase one new 996.2 GT3 caliper with the ceramic pistons from Mid Sussex Porsche is £867.02 inc vat. The Porsche part number is 996.351.431.30. The Brembo part number is 20.7907.03/04.

Let me say I will be VERY surprised if I can buy them new for £300 per caliper but if I can......:drool:

Let me know :wink:

[shane@mbtech]

£300:drool: Care to share where that price comes from??? I will buy a few pairs if that's the real price to the average man on the street. If they are available new for £300ea I will buy a pair or two and get these back on ebay for an easy profit :wink:

To purchase one new 996.2 GT3 caliper with the ceramic pistons from Mid Sussex Porsche is £867.02 inc vat. The Porsche part number is 996.351.431.30. The Brembo part number is 20.7907.03/04.

Let me say I will be VERY surprised if I can buy them new for £300 per caliper but if I can......:drool:

Let me know :wink:

That's exactly how much I paid, iirc I bought them through parr,

It was about £640 inc delivery for the pair.

[sjb]

That's exactly how much I paid, iirc I bought them through parr,

It was about £640 inc delivery for the pair.

You jammy git :hahaha:

I've just spoke to them, they are only up the road in Crawley. They can get them for £725ea +vat (£870inc - same as Porsche main dealer). They said they have NEVER been sold that cheap ^ (not even as a bare body with no pistons or seals) so however you got them at that price then well done :beer::hahaha: You must have got one helluva trade discount, I got all excited for a while ;)

Mine seem like a bargain again unless anyone knows different ;)

[shane@mbtech]

You jammy git :hahaha:

I've just spoke to them, they are only up the road in Crawley. They can get them for £725ea +vat (£870inc - same as Porsche main dealer). They said they have NEVER been sold that cheap ^ (not even as a bare body with no pistons or seals) so however you got them at that price then well done :beer::hahaha: You must have got one helluva trade discount, I got all excited for a while ;)

Mine seem like a bargain again unless anyone knows different ;)

I'll get a price for you

[73CSL]

why the move from 4pots to 6 pots ?

They only have surface battle scars to be honest and split dust seals, they look worse than they actually are. I refurbished my current 4 pot brembos and it's not too much hassle doing it yourself.

http://img.photobucket.com/albums/v709/shawn63deluxe/photo58-2.jpg

http://img.photobucket.com/albums/v709/shawn63deluxe/photo57-1.jpg



The project is to get the f*ckers fitted and working on my CSL :thumbs:
If the Yanks can do it.....although they machine down lug fitment Cayenne 6 pots due to the GT3 6 pots rarity.

[sjb]

I'll get a price for you

Cheers :beer:

[Neil M]

For sale down on the farm:
http://www.pistonheads.com/classifieds/parts-and-plates/parts-and-accessories/bmw/brembo-csl-brakes-upgrade/1895325?isexperiment=true
If you like Brembos, or that way inclined?:thumbs:

[sjb]

why the move from 4pots to 6 pots ?

My reasons,

90% for the extra bling
10% for the extra performance :hahaha:

Seriously, the extra area of the larger discs, also the 6 pot pads are 50% (ish without working it out again) bigger than the 4 pot pads all add up to in theory on paper etc etc a more powerful set up. There's no reason why this shouldn't compare to an AP 6&4 pot set up, the AP front 6 pots have 27/32/38mm pistons compared to my 28/32/38mm for example. Also I just love tinkering with things like this and it would bug me to know this is possible but I hadn't bothered to try it out. My present 4 pot set up will be easy to move on over on the cutters for good money, I paid peanuts for them before the easy refurb.
I'll be getting all OE is best in a few months :clown:

[The Gorilla]

Hi,

Not sure I follow this ?

The 6 Pot Brembos as posted etc
are approx 1 kg heavier a piece than
the AP's due to being a Monoblock
caliper and with lugs.
[Shaving the lugs saves a little]

BMW E9X M3 Front discs are approx 1.2
KG,s each heavier than the std CSL front
disc

On the Priomates Calculator thats a gain
of approx 2.2 kg/s plus of unsprung weight
per side, which in real terms is a 1-5 ratio for
roll centre and weight transfer.

Thus the slide rule calculates that the marginal
improvement on braking over say 4 pot Brembos
on the std CSL discs [which are very good]
has added 10ks of weight each side [20kgs]
overall.

I know which I would prefer.

Therefore struggling with the ethos of the gain, although
the yanks have this misconception that if
its bigger then it sure must be better attitude
to most things, of which motorsport is included.
Porn may be the exception to the rule.

Regards,

The Gorilla.

[sjb]

For sale down on the farm:
http://www.pistonheads.com/classifieds/parts-and-plates/parts-and-accessories/bmw/brembo-csl-brakes-upgrade/1895325?isexperiment=true
If you like Brembos, or that way inclined?:thumbs:

Seen those a few weeks ago, 4 pots though and although a straight bolt on not exactly great value for money and then you'd have to get the rear discs to match and check whether the piston size would effect bias if sticking with OG rear calipers (although if it's a bespoke CSL front set up you'd hope that would be ok) etc etc
Oh, and they aren't bling enough for me :whistle:

[sjb]

Hi,

Not sure I follow this ?

The 6 Pot Brembos as posted etc
are approx 1 kg heavier a piece than
the AP's due to being a Monoblock
caliper and with lugs.
[Shaving the lugs saves a little]

BMW E9X M3 Front discs are approx 1.2
KG,s each heavier than the std CSL front
disc

On the Priomates Calculator thats a gain
of approx 2.2 kg/s plus of unsprung weight
per side, which in real terms is a 1-5 ratio for
roll centre and weight transfer.

Thus the slide rule calculates that the marginal
improvement on braking over say 4 pot Brembos
on the std CSL discs [which are very good]
has added 10ks of weight each side [20kgs]
overall.

I know which I would prefer.

Therefore struggling with the ethos of the gain, although
the yanks have this misconception that if
its bigger then it sure must be better attitude
to most things, of which motorsport is included.
Porn may be the exception to the rule.

Regards,

The Gorilla.

An AP 6 pot caliper weighs 3000grms (internet search) and my GT3 cup 6 pots weigh 3496grms dead. I don't know which brembo 6 pot you are thinking of but these aren't 1000grms heavier.

I'm very interested to weigh the E9X M3 front discs later tonight/tomorrow to check the weight of those but 1.2kg a piece heavier than CSL ones?????Interesting.

For the record my CSL iron front caliper weighs 5800grms !

20kgs extra weight is simply not the case (in my case).

I'm more interested in the performance difference between std CSL > 6&4 pot brembo set ups. The marginal difference between 4 pot fronts and 6 pots fronts isn't too much of a concern. The 6 pots look much better :gayfight:

And not that it really matters but I'm saving myself a shedload on buying an AP front kit new, £2.5k+??? and having something a bit different.

[sjb]

Hi,

Not sure I follow this ?

The 6 Pot Brembos as posted etc
are approx 1 kg heavier a piece than
the AP's due to being a Monoblock
caliper and with lugs.
[Shaving the lugs saves a little]

BMW E9X M3 Front discs are approx 1.2
KG,s each heavier than the std CSL front
disc

On the Priomates Calculator thats a gain
of approx 2.2 kg/s plus of unsprung weight
per side, which in real terms is a 1-5 ratio for
roll centre and weight transfer.

Thus the slide rule calculates that the marginal
improvement on braking over say 4 pot Brembos
on the std CSL discs [which are very good]
has added 10ks of weight each side [20kgs]
overall.

I know which I would prefer.

Therefore struggling with the ethos of the gain, although
the yanks have this misconception that if
its bigger then it sure must be better attitude
to most things, of which motorsport is included.
Porn may be the exception to the rule.

Regards,

The Gorilla.

Ok the E9X M3 discs are heavier on the front compared to the OE CSL disc, slightly less so on the rear. For a non full time racecar I COULD live with this because the other improvements outweigh the weight, here's what I know already....

Both caliper and disc are unsprung weight.
(every 1 unsprung lb. is equal to aprox 3 sprung lbs of weight savings)

The disc is also a rotational weight savings which is the most beneficial.
(every 1 rotational lb. is equal to aprox 6-7 lbs. of actual weight savings) :119:

The Benefits

Increasing heat capacity at the same time, NO more fade.

For the caliper I save weight by eliminating a big heavy sliding caliper and gaining an aluminum opposed piston caliper. Precise response, improved pedal feel, more control, and overall confidence.

HOWEVER I am sticking with the calipers but will be looking into a change of disc as rotating weight is far more important...
Fronts..
345MM CSL 8.95KG OE
360MM E9XM3 10.2KG OE
355MM BREMBO 2-PC 7.3KG ;)
356MM Performance friction 9.2kg
Others to be investigated....

All interesting stuff :thumbs:

[The Gorilla]

Hi,

What fluid Transfer do the Brembos
have in relation to say the std Calipers
or say the AP's which were both designed
with the E46 Pedal ratio /fluid transfer ?.

The E46 M3 master cylinder has a restrictor
in the rear system so when AP designed
the Fronts they retained the front to rear
ratio split v pedal ratio v fluid transfer
which is approx 70/30..

Alcon never got this right hence why you
have a different pedal feel etc.

As regards the weight of the calipers
check them weight differnce wet not
dry I think its more than your saying.

Rotational mass is irrelevent on the twisties
where cross plane weight transfer occurs
its down to unsprung weigh etc, so less
is better, and its in the twisties where
you sort the wheat from the chaff.

But hey just trying to understand.

Std CSL disc with a 4 Pot brembo would
stop justy as well, not sure wht you feel
the need to lug [no pun] those E9X M3
discs around ?.

As a tailnote on my E30 M3 with the CSL
engine reducing unsprung weigh was
important so much so that I ran 24
vane not 48 vane 28mm discs at 353mm diam
and saved over a kilo aside just on the
discs.

It all adds up.

Regards,

The Gorilla.

[sjb]

I'm getting what you're saying, the performance friction discs are the discs of choice now as they appear to be near as dammit the same weight as the CSL OE ones.
My calipers are bone dry as I have already blown them through with an air line, the AP's (CL5555) were weighed dry right out of the box, hotwheels was the site I think. A guy bought together lots of new calipers, new brembo 4&6 pots, AP 6 pots, tarox etc to weigh for an alfa comparison test.
I have no real knowledge of the influence of the fluid transfer issue but the brembo (4 & 6 pot (cayenne)) conversion is very common on the E46, my present set up certainly has a lovely pedal (monkey @ ML got them bled up nice and firm) and a known good bias as does this new conversion, as long as I don't end up with a solid wooden pedal I can live with (and get used to) any pedal feel that I end up with. There's plenty of positive reviews out there in internet land worldwide.

I will end up with PF discs that weigh as good as the same as OE CSL even though they are bigger.

Brembo 6 pot calipers are 500grms heavier than AP's , but 2200grms lighter than OE CSL on the front per caliper.

As for the rear, Brembo GT3 4 pot 2397grms, AP 4 pot 2200grms, OE CSL 3426grms per caliper.

Piston sizes between AP & Brembo 6 & 4 pots appear VERY close.

I can see where you are coming from regarding considering the weights to the extreme but my car is not a full on race car, what I will end up with will be more than adequate for my needs and a fair bit better than OE, which is my only concern. Even with the added cost of PF discs over OE I'm still doing fine cost wise over AP and having something a little different.



Oh and they look better :clown: