[neonovvy]

Originally Posted by johnung

My understanding has always been that there are two brake bias settings. It’s like a front and rear braking ratio. In practice it’s when a front brake caliper is upgraded from a Bosch 312x24 or Bosch 330x24, to either of the Brembo front 340x30 or 370x30. No one would upgrade a rear to the Brembo 345x24 without upgrading the front to a Brembo caliper.

I got this from an experienced BMW dealer tech who installed my first brake upgrade (on the side) from F340/R330 to F340/R345. He told me that my car came with the S2NH code from the factory because I already had the Brembo 340’s on the front. Later when I upgraded my front calipers from 340’s to 370’s, I didn’t have to code either because again my car already had the S2NH brake bias code.

And that is clear answer I was looking for. Thank you very much. Probably I will sit on coding tommorow

[johnung]

Originally Posted by irfant24

Wow! the level of detail you provide is out of this world. I cant thank you enough for this - this really helps me.

my VIN is k431310.

With the two options I'm guessing the first option is significantly cheaper.
Could you provide rough total price points for each option.

Also for the 2nd option I would need to purchase the blue calipers but just wondering if there is an OEM caliper so I don't need to buy 2nd hand ones for nearly £800.
https://www.autodoc.co.uk/abs/138666...BoC84UQAvD_BwE

The link above is something I've seen online which looks like the blue brakes but unsure if they are good at all or I should definitely go for 2nd hand BMW ones.
Ofcourse I want it to be cost effective but also I don't want to compromise on my brakes at the same time.


thanks for your help again.
Irfan

Glad that I could help. I just began hearing of these Brembo knock off calipers a few months ago. Looks like they have proliferated much faster in the UK. The specs look identical to me. I would give them a shot.

Do you have BMW 17” or BMW 18” wheels? BMW 18” can fit any F3x brakes. BMW 17” will fit Front 340’s but not 370’s. I cannot recall off the top of my head if Rear 345’s just fit under BMW 17” wheels or not.

Don’t listen to anyone who badmouths Hawk 5.0 brake pads. I have used them on all my cars for years and recommended them to many people who have all had great experiences. IMO They are by far the best street performance pads with great bite, instant warmup and low light dust.

Several years ago one of my buddies was badmouthing Hawk, thinking he had installed 5.0. When I asked him to show me, it turned out that he had incorrectly installed an older model Hawk pad that didn’t meet his requirements.

IMO avoid ceramic pads like Akebono. It seems like every brake pad brand has a ceramic model. People buy them solely on the promise of low dust. Their performance is no better than average. It’s much better to clean wheels well and apply a ceramic coating to prevent dust and dirt from sticking. Then stuff washes right off.

[johnung]

So if you buy those new calipers and wish to change the color, I highly recommend G2USA Caliper Paint. They ship internationally. It’s a two part epoxy paint that doesn’t fade of chip. You brush it on and it flattens out as it dries to a smooth sprayed on looking finish. It comes in standard and custom colors

Note: Very important to only paint when air temp is within their specified range or it can get clumpy on the brush. Follow instructions carefully

See photo of my buddy’s blue calipers that he painted in G2USA custom Ferrari Red.

[casualDIYer]

Originally Posted by neonovvy

Hi guys. Yesterday I successfully changed my brakes. From 312/300 to 340/330 (Brembo 4 pistons and bosch 1 piston). I have bleeded my brakes 2 times and my pedal is very spongy. I didnt code anything, is there something I can do to fix this? Thanks

Is there a reason you stopped at 2 times? Seems you know what the goal is so bleed again. While you can use BMW's magic bleed procedure, after talking to a few BMW techs, they say even they don't use the procedure. Brake fluid is relatively cheap and you really can't store it for long without it absorbing too much water making it useless.

Too bad you didn't go with the 2-piston rear Brembos. You missed an opportunity to suffer immensely trying to change pads on those calipers. It's a huge contrast compared to the fronts where you could assign an 8-year old to do the job. The fronts are ridiculously easy.

[casualDIYer]

Originally Posted by johnung

So if you buy those new calipers and wish to change the color, I highly recommend G2USA Caliper Paint. They ship internationally. It’s a two part epoxy paint that doesn’t fade of chip. You brush it on and it flattens out as it dries to a smooth sprayed on looking finish. It comes in standard and custom colors

Note: Very important to only paint when air temp is within their specified range or it can get clumpy on the brush. Follow instructions carefully

See photo of my buddy’s blue calipers that he painted in G2USA custom Ferrari Red.

I've used this paint as well. I picked silver and while my results were not as good as johnung (the paint was a bit streaky) the job appeared more than half-a$$ (maybe 3/4-a$$). But what I really liked was the paint resists brake dust well and it does not melt. Having painted a number of calipers with different variants of 'ceramic' paint, some are quite good and some are pretty much piss water, either melting, or attracting dirt from brake dust, the road, other cars, other planets, you name it, it's stuck on there. But the G2USA, price is a premium and streaky brush depends on colour, but I recommend it. It keeps a clean look.

[johnung]

Originally Posted by casualDIYer

I've used this paint as well. I picked silver and while my results were not as good as johnung (the paint was a bit streaky) the job appeared more than half-a$$ (maybe 3/4-a$$). But what I really liked was the paint resists brake dust well and it does not melt. Having painted a number of calipers with different variants of 'ceramic' paint, some are quite good and some are pretty much piss water, either melting, or attracting dirt from brake dust, the road, other cars, other planets, you name it, it's stuck on there. But the G2USA, price is a premium and streaky brush depends on colour, but I recommend it.

G2USA has specific instructions about the range of air temperature for painting. Since it was summer, I did all of my prep work of cleaning the calipers and sanding any rough spots the day before. I left the car on jack stands overnight. I painted in the morning when temperatures were cooler and in the prescribed range.

I was able to get several coats on. That paint goes a long way. As I was finishing up I noticed that the paint was getting clumpy on my brush. Sure enough the temperature had risen a few degrees above the allowable range.

Only one brush is included in the kit. I found the same acid type brush with the aluminum handle at Harbor Freight. They were something like $3 for a pack of 36 brushes. They are great for applying glue, small paint jobs, etc. Great throw away brush

[neonovvy]

Originally Posted by casualDIYer

Is there a reason you stopped at 2 times? Seems you know what the goal is so bleed again. While you can use BMW's magic bleed procedure, after talking to a few BMW techs, they say even they don't use the procedure. Brake fluid is relatively cheap and you really can't store it for long without it absorbing too much water making it useless.

Too bad you didn't go with the 2-piston rear Brembos. You missed an opportunity to suffer immensely trying to change pads on those calipers. It's a huge contrast compared to the fronts where you could assign an 8-year old to do the job. The fronts are ridiculously easy.

I've done it just to make sure that I don't have any air in the system.
I bought this set for about 500E total with almost new OEM discs, for that price I can live with 1 piston at rear

[kepmic]

Originally Posted by casualDIYer

You missed an opportunity to suffer immensely trying to change pads on those calipers. It's a huge contrast compared to the fronts where you could assign an 8-year old to do the job. The fronts are ridiculously easy.

Yes, its such a pain trying to find a right spot on the rear to hit a hammer without damaging caliper paint.

[mica69]

good day guys, i have F22 M240i 2017, i want to downgrade and install 300x20 instead of 345, will i have problem on something? ( reason is remove unsprung weight ) as i know brake shoe should be D=160MM and 300x20 all is 160mm ( who have 185mm they cant install it, for example some of f30 and f32 b58, all f22-f22 b58 there is 160mm)

[co_440i]

Originally Posted by mica69

good day guys, i have F22 M240i 2017, i want to downgrade and install 300x20 instead of 345, will i have problem on something? ( reason is remove unsprung weight ) as i know brake shoe should be D=160MM and 300x20 all is 160mm ( who have 185mm they cant install it, for example some of f30 and f32 b58, all f22-f22 b58 there is 160mm)

You want to downsize your rotors to remove unsprung mass? Why not just get higher quality lighter rotors? Even the larger 370 M Performance front rotors are significantly lighter than the stock 340 front rotors

[cfm56d7b]

Originally Posted by mica69

good day guys, i have F22 M240i 2017, i want to downgrade and install 300x20 instead of 345, will i have problem on something? ( reason is remove unsprung weight ) as i know brake shoe should be D=160MM and 300x20 all is 160mm ( who have 185mm they cant install it, for example some of f30 and f32 b58, all f22-f22 b58 there is 160mm)

It's a good idea to create a new thread with a new topic. You will get more meaningful comments.

[Ennoch]

Originally Posted by danb1979

The Brembo HP2000s do get good reviews; not run them myself but know a few folk that have and they're a good fast road pad, but typical Brembo and very dusty!

I'd say they are one of the least dusty pads I've used, more so if you just look at performance ones. Even with hard (and I mean to the point of straw/purple discs and the pads going off) the dust is light coloured and washes off with soap only. Very different to pretty much every other pad I've used, apart from ceramic, and my experience of them is that they're shit.

[Ennoch]

Originally Posted by johnung

Glad that I could help. I just began hearing of these Brembo knock off calipers a few months ago. Looks like they have proliferated much faster in the UK. The specs look identical to me. I would give them a shot.

If it was a chinesium copy of an AP race caliper or an Alcon I'd say you aren't getting like for like (although unless it was very heavily machined for weight loss I'd still not be concerned about it being dangerous). Brembo OEM however are utter garbage and always have been, and likely are made in china from the same quality of material as these replacement ones. There are a few sources of these now for Subarus and Evos which came with Brembos and aside from the lack of paint are absolutely equal of the original from a finishing perspective. Is there a chance they may have issues in them? Possibly. Is the line pressure of the brake likely to blow even a substandard caliper apart if it isn't leaking? Definitely not. A brand new copy caliper vs a knackered 10-20 year old one with galvanic corrosion? It isn't even a contest, it would be the new copy every time for me.

[mica69]

Originally Posted by co_440i

You want to downsize your rotors to remove unsprung mass? Why not just get higher quality lighter rotors? Even the larger 370 M Performance front rotors are significantly lighter than the stock 340 front rotors

its not important front disc how much will be, i said unsprung, car is RWD, 300mm disc costs 30$ second hand, and aftermarket performance 700$+

as i looked it will work, only handbrake size should be 160mm there is 2 type of it F30 F32 is 180mm and F20 F22 and some F30 (320i-328i) is 160mm

rear brake pad height is 90mm, if we install 300mm rear disc, pad will work only 70mm wich i think it wont problem and remove 3KG per axle will noticeable, its only good on drag racing, not for track for sure

[Ennoch]

You could also try drilling holes in your driveshafts and suspension arms, that'll help both rotational and unsprung weight too...

[mica69]

Originally Posted by Ennoch

You could also try drilling holes in your driveshafts and suspension arms, that'll help both rotational and unsprung weight too...

[astrapower]

Hello, I have a 328i xDrive with stock 312 mm front brake discs. Can I change only the front ones to 340 mm and leave the rear ones at 300 mm? Is it good upgrade?
Thank's in advance!

[1qwer1]

I have a BMW F31N 318d and I need to buy a front and tire brake discs and brake pads. What company do you recommend buying brake pads and brake discs ?

[astrapower]

Hi, you can buy or OEM ones or Zimermann. May be the best option is OEM front pads+rotors and aftermerket for the rear ones (ATE or Zimermann).