Z4M - Best brake upgrades 2023

InterlagosMC · Post by **InterlagosMC** » Fri Dec 01, 2023 10:29 am

I’m in Surrey/ south west london. Would be good if you don’t mind depending if that’s near to you

barryb97 · Post by **barryb97** » Sat Dec 02, 2023 12:59 am

PB Brakes

gr3mlin · Post by **gr3mlin** » Sun Dec 03, 2023 9:28 pm

Thanks for all the suggestions

Now just need to make a decision

gr3mlin · Post by **gr3mlin** » Wed Dec 06, 2023 4:40 pm

Anyone know how much extra a brake disc would need to be offset vs. E46 M3?

maupineda · Post by **maupineda** » Thu Dec 07, 2023 2:59 am

They shared brakes.

InterlagosMC · Post by **InterlagosMC** » Thu Dec 07, 2023 8:55 am

gr3mlin wrote: ↑Wed Dec 06, 2023 4:40 pm Anyone know how much extra a brake disc would need to be offset vs. E46 M3?

As above the brakes on both m cars were the same however the steering knuckle is different meaning that some brake options for the e46 m3 don’t work on our m cars the same. I’m unsure of exact differences as I can’t find any dimension drawings of the parts

gr3mlin · Post by **gr3mlin** » Thu Dec 07, 2023 10:05 am

I like the idea of trying to fit the f8x CCB but needs to be shimmed 3mm for E46 . . So would need more for Z4 - Expensive to try and find out if it’s possible!

I’ve got some second hand parts to fit to keep me going until I see a decent deal on an upgrade.

InterlagosMC · Post by **InterlagosMC** » Thu Dec 07, 2023 11:38 am

gr3mlin wrote: ↑Thu Dec 07, 2023 10:05 am I like the idea of trying to fit the f8x CCB but needs to be shimmed 3mm for E46 . . So would need more for Z4 - Expensive to try and find out if it’s possible!

I’ve got some second hand parts to fit to keep me going until I see a decent deal on an upgrade.

I’ll put it this way, I believe the Z4M need about 5-6mm shim to run the e92 m3 front discs while the e46 m3 can bolt them straight on so based off that logic you would need around 8-10mm of shims to work which is probably too much

gr3mlin · Post by **gr3mlin** » Thu Dec 07, 2023 2:22 pm

Yeah think you are right - on the plus side that will save me a lot of money

wspohn · Post by **wspohn** » Tue Feb 13, 2024 10:48 pm

gr3mlin wrote: ↑Tue Nov 28, 2023 5:27 pm I need new front discs/pads and probably a caliper refurb/replacement. . . So I might as well go for an upgrade

I don't get this. There are many cars with substandard brakes that cry out for an upgrade and in those cases the need to refresh what is there is a good excuse for an upgrade, but the stock brakes on the Z4M are excellent and the only change that might be arguably worthwhile is a switch to a different pad compound to suit whatever use you are making of the car.

Given the various fiddles and machining operations needed to fit different calipers that may be of questionable virtue as far as actual performance improvement goes, I question whether the urge to modify just for the sake of it is sensible. Are you planning to track the car or are you just after bragging rights? Have you found the braking performance to fall short of what you wanted for street use?

gr3mlin · Post by **gr3mlin** » Wed Feb 14, 2024 2:29 pm

If I need to spend some money on replacing/fixing anything always look at the upgrade options vs. OEM, don’t get why you wouldn’t - it’s a 18 year old car, technology has moved on etc, so always worth a look.

Not had a problem with the standard brakes, however I think a BBK looks better, I’ve supercharged the car so any additional braking ability can’t hurt & main reason is I enjoy modifying cars

3gGT01 · Post by **3gGT01** » Sat Feb 17, 2024 5:32 pm

: Trying to match up paint color.; IMG_3547.jpeg (152.91 KiB) Viewed 241 times

I went the Freakyparts route for front 4 pot calipers using stock rotors. Now adding Porsche 911/Boxster/Cayman rear calipers. Style won't match rear ones, hopefully will still look okay.

Thought I would source rears from Rockauto as remans, but after receiving 4 driver's side calipers instead of passenger side will just keep one of the the drivers side and sourcing used off of eBay.

: So got this one one...; IMG_3599.jpeg (186.83 KiB) Viewed 241 times

: Got it all cleaned up and noticed one side is snobbed off compared to the other one from Rockauto. So now I have purchased yet another eBay caliper to match. Interesting the P/N's match between snobbed one and non-snobbed one. Lesson learned!; IMG_3603.jpeg (197.06 KiB) Viewed 241 times

: Rockauto 421; IMG_3604.jpeg (135.72 KiB) Viewed 241 times

All this shipping time has really drawn out this whole upgrade!

Beedub · Post by **Beedub** » Sun Feb 18, 2024 4:38 pm

Here's a pic of my setup .... Again amazing brakes truly amazing but the replacement parts just seems way way way over priced.

3gGT01 · Post by **3gGT01** » Sun Feb 18, 2024 4:57 pm

Beedub wrote: ↑Sun Feb 18, 2024 4:38 pm Here's a pic of my setup .... Again amazing brakes truly amazing but the replacement parts just seems way way way over priced.

That's a beast! Looks good though! Any proportioning valve additions/changes to make that 6 piston work?

Beedub · Post by **Beedub** » Sun Feb 18, 2024 5:37 pm

3gGT01 wrote: ↑Sun Feb 18, 2024 4:57 pm
Beedub wrote: ↑Sun Feb 18, 2024 4:38 pm Here's a pic of my setup .... Again amazing brakes truly amazing but the replacement parts just seems way way way over priced.
That's a beast! Looks good though! Any proportioning valve additions/changes to make that 6 piston work?

its all properly piston sized for the master cylinder etc.... the 4pot rear can feel abit aggressive with a less sticky tyre but outside of that its absolutely unreal... Had these fronts glowing red a few times!

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