M5 brake upgrade

N

Nostromo

Member
Has anyone fitted m5 callipers to their e85?
Looking to change shells and brakes in the new year, looking at 18”, and I love the flat design of the m5 callipers.
 
I don't know if that'd work. I'd imagine you'd ruin the balance between front and rear brakes and find you suddenly have a load more pedal travel because of the bigger pistons.
 
Depends which year M5. Anything is possible, but it will all depend on disc offset and how you mount the calipers. Ultimately I doubt anyone will have done it before so if you can get a set of calipers cheap enough you could mount tjem on the hub and go from there.

In terms of balance I very much doubt you'd upset anything, the majority of the braking is done at the front anyway. Plenty of people do big ol ap racing front brakes and stock rears with no issues on track etc so I'm sure you'll be fine. Be an interesting project, pop some pics up if you do decide to give it a bash
 
As you have a 2.0 and are thinking of track days according to your intro post then maybe consider changing up to the brakes from a facelift 3.0si, front and rear.
With the lighter engine, set back behind the front axle, I think you'll find that a good balance.
150bhp may leave you a little light on the straights but the corners will surprise a few people.
 
Ed Doe said:
Depends which year M5. Anything is possible, but it will all depend on disc offset and how you mount the calipers. Ultimately I doubt anyone will have done it before so if you can get a set of calipers cheap enough you could mount tjem on the hub and go from there.

In terms of balance I very much doubt you'd upset anything, the majority of the braking is done at the front anyway. Plenty of people do big ol ap racing front brakes and stock rears with no issues on track etc so I'm sure you'll be fine. Be an interesting project, pop some pics up if you do decide to give it a bash
Click to expand...

Thanks for the input, I will try and get abit of advice from a local bmw specialist and see if they have done anything similar , as it’s going to be abit expensive. Cheapest front callipers I’ve seen are 700, then I will need some rotors and 19” wheels to sit over them.
 
enuff_zed said:
As you have a 2.0 and are thinking of track days according to your intro post then maybe consider changing up to the brakes from a facelift 3.0si, front and rear.
With the lighter engine, set back behind the front axle, I think you'll find that a good balance.
150bhp may leave you a little light on the straights but the corners will surprise a few people.
Click to expand...

Leaning towards the m5 ones due to the aesthetics, don’t mind spending extra as the car didn’t cost much, as for the track not too fussed about the straights, happy with a nice handling manageable machine. My first track bike was a rc8r, 170ish bhp with no traction control :cry: i had a couple of expensive offs on that bike! Had a more powerful bike on the road after that, kept it for six months then decided I could not get the most out of it, my current track bike build is based on a 749cc engine, super light and only 110hp. Enough to have fun and not end up with a big bill. :D
 
Nostromo said:
enuff_zed said:
As you have a 2.0 and are thinking of track days according to your intro post then maybe consider changing up to the brakes from a facelift 3.0si, front and rear.
With the lighter engine, set back behind the front axle, I think you'll find that a good balance.
150bhp may leave you a little light on the straights but the corners will surprise a few people.
Click to expand...

Leaning towards the m5 ones due to the aesthetics, don’t mind spending extra as the car didn’t cost much, as for the track not too fussed about the straights, happy with a nice handling manageable machine. My first track bike was a rc8r, 170ish bhp with no traction control :cry: i had a couple of expensive offs on that bike! Had a more powerful bike on the road after that, kept it for six months then decided I could not get the most out of it, my current track bike build is based on a 749cc engine, super light and only 110hp. Enough to have fun and not end up with a big bill. :D
Click to expand...
I was just thinking that my solution would not cause you balance problems front to rear. You go with what suits you. It will definitely look the part.
 
enuff_zed said:
Nostromo said:
enuff_zed said:
As you have a 2.0 and are thinking of track days according to your intro post then maybe consider changing up to the brakes from a facelift 3.0si, front and rear.
With the lighter engine, set back behind the front axle, I think you'll find that a good balance.
150bhp may leave you a little light on the straights but the corners will surprise a few people.
Click to expand...

Leaning towards the m5 ones due to the aesthetics, don’t mind spending extra as the car didn’t cost much, as for the track not too fussed about the straights, happy with a nice handling manageable machine. My first track bike was a rc8r, 170ish bhp with no traction control :cry: i had a couple of expensive offs on that bike! Had a more powerful bike on the road after that, kept it for six months then decided I could not get the most out of it, my current track bike build is based on a 749cc engine, super light and only 110hp. Enough to have fun and not end up with a big bill. :D
Click to expand...
I was just thinking that my solution would not cause you balance problems front to rear. You go with what suits you. It will definitely look the part.
Click to expand...
Thanks for the input, I will have to do abit more research, your solution may be best for the balance, maybe I can find a compromise, I am partial to the m callipers on the x range of cars and they look to be 4 piston.
 
Looks like it is possible, brief view of the on a roadster in the first part of this video.
[youtube] https://youtu.be/49d_GpOoqBg[/youtube]
 
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