I'll start by saying I know this is not a straight swap and this will be on a F31. However, as we all know, if it can be done on F3x then by default it would also work with E8x, E9x, F2x etc too.
I have a pair of F8x CCB gold 6 pots. No pads & no discs.
It seems that the incoming M2 competition will be using the identical front calipers for the 2NH braking upgrade - albeit with more realistically priced iron discs & conventional pads.
My thoughts are to obtain the M2 competition 400mm rotors & pads and find somewhere to machine some new radial mounts for the 6 pots to suit F3x hubs.
Should be much easier with radial mounted calipers rather than axial mounted to obtain the correct spacing with a new custom bracket.
Would be interested to hear people's thoughts on this?
When ordered with the grey 6 pots from factory, you get the stock pads. When buying the 6 pots from the dealer accessory catalogue, you get the 'Sport' pads.
I've now bought the stock pads, at a much more reasonable £190. Just the discs left to source now once they are available in mid August.
With regards to brake pedal, the info from Racing Brake has covered that off - it will be the same as stock.
racingbrake said:
You are basically swapping the original blue 4/2 pot to gold 6/4 pot calipers just like upgrading to other aftermarket brake kits. In other words, it shall not relate to CCB system.
For your information, here is the piston size and front/rear area ratio:
Front 4 pistons: 40/40mm = 50.3 cm^2 (67%)
Rear 2 pisotns: 40mm cm = 25.1 cm^2 (33%)
Total: 75.4 cm^2
Total piston area and F/R ratio are almost identical on both set up, so we see no reason to be even concerned on brake bias due to this upgrade, while it might be worthwhile for you to check aftermarket brake kits that you are considering before you purchase.
I have also sourced a set of F10 M5 6 pots too - which has a 5mm shorter mounting point, plus the removal of titanium pistons, which the CCB calipers have:
I will be getting brackets made for both sets of calipers so that it leaves options open for people wishing to follow suit as F10 M5 calipers are far easier to source on the used market than F8x CCB's!
I will also be working with the company doing the work to engineer a radial bracket for the F10 M5 calipers which is identical to the radial bracket on the CCB caliper (+5mm) so that the F10 M5 caliper can become P&P for the F8x chassis with the use of the M2 Comp 400mm discs...
The blue M5 / M6 6 pots turned up today - couple of comparison shots - the gold definitely makes these calipers stand out / look bigger compared to the blue!
Some shots showing the 5mm mounting point difference, as detailed previously, again a stock 4 pot for size comparison:
Also a couple of shots showing differences between OEM F10 M5 brake hoses and OEM F30 hoses - I need to check out the F3x / F8x hoses that are fitted from factory on cars optioned with CCB's. If its the same as the F10 ones with the small metal input section then I will factor those into the conversion too.
Sub'd as am curious about a set of the m5 blue calipers fitting front of m2 with thicker 370-380 discs.
Looking at yr photo above - the oem adaptor bracket looks like it has enough meat on the mount flanges to reduce its height (similar to mount lugs between blue and gold calipers) TP suit a smaller disc diameter
Sub'd as am curious about a set of the m5 blue calipers fitting front of m2 with thicker 370-380 discs.
Looking at yr photo above - the oem adaptor bracket looks like it has enough meat on the mount flanges to reduce its height (similar to mount lugs between blue and gold calipers) TP suit a smaller disc diameter
I'm fairly confident it will work without issues as I have a F30 hub to mount it all up on & the measurements & brackets will be done by a professional outfit that only does this exact work.
I'm not quite sure I know what you mean about the mount flanges? Are you talking about machining material off the calipers?
My reference to mount flanges was on silver adapter bracket where it meets gold caliper in photo above. You could perhaps remove 5mm thickness of each silver mount flange provides adapter doesn't foul on the caliper
My reference to mount flanges was on silver adapter bracket where it meets gold caliper in photo above. You could perhaps remove 5mm thickness of each silver mount flange provides adapter doesn't foul on the caliper
The 5mm doesn't affect me for F3x use, as custom radial brackets are going to be built for each caliper version.
Then for M2 / M3 & M4 owners, a copy of the silver bracket will be made (+the extra 5mm) so that the blue F10 M5 calipers can be made to work on F8x chassis with the 400mm discs.
My reference to mount flanges was on silver adapter bracket where it meets gold caliper in photo above. You could perhaps remove 5mm thickness of each silver mount flange provides adapter doesn't foul on the caliper
The 5mm doesn't affect me for F3x use, as custom radial brackets are going to be built for each caliper version.
Then for M2 / M3 & M4 owners, a copy of the silver bracket will be made (+the extra 5mm) so that the blue F10 M5 calipers can be made to work on F8x chassis with the 400mm discs.
My reference to mount flanges was on silver adapter bracket where it meets gold caliper in photo above. You could perhaps remove 5mm thickness of each silver mount flange provides adapter doesn't foul on the caliper
The 5mm doesn't affect me for F3x use, as custom radial brackets are going to be built for each caliper version.
Then for M2 / M3 & M4 owners, a copy of the silver bracket will be made (+the extra 5mm) so that the blue F10 M5 calipers can be made to work on F8x chassis with the 400mm discs.
A further update, my spare hub arrived & curiosity got the better of me, so I mounted a 370mm 4 pot caliper on vs a 400mm 6 pot CCB caliper:
Kind of irrelevant until I see the hat height / offset of the M2 competition 400mm rotors.
However, the caliper position seems pretty similar.
I did encounter the first issue though, and that is that the OEM CCB radial bracket does not bolt flush into a F3x hub. This will be replaced anyway via a custom radial mount...
OK, so finally I can update this..... with the results of my ongoing brake project in conjunction with Vagbremtechnic
To confirm, this is a pair of F10 M5 6 pot calipers fitted onto F3x chassis with a custom radial bracket. Pads are genuine BMW M5 items, and the discs are M2 Competition 400mm.
Pedal feel is fine, and the brakes have only done 150 miles so far, so are still being bedded in, but initial feel is very good.
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Related Threads
?
?
?
?
?
Baby BMW Forum
1.3M posts
45K members
Since 2004
A forum community dedicated to all 1 and 2 series BMW owners and enthusiasts. Come join the discussion about performance, modifications, classifieds, troubleshooting, maintenance, and more!