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Thread: E60 M5 front brakes

  1. #1
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    E60 M5 front brakes

    Since Tyler's S62 conversion is having some part delays I decided to tackle this project that has been laying here for a few weeks.
    ECS 2 piece E60 M5 rotors. I bought a pair of calipers on Fleabay for $250.

    Mock up....


    I used 1/16 bits of aluminum to space the bracket off the rotor, 1/16 was perfect to center the pads on the rotor face.



    The mounting face is in the correct spot it's just the holes that are in the wrong spot


    Luck would have it I had a center punch that was the perfect size


    E38 bolt center is 112mm


    All I have is a drill press. I checked the level and square of the table to the drill bit. A little shim and it was perfect. I used a couple of C-clamps to hold the bracket solid. I bought the drill bit and tap from a machine shop and tooling supplier here in town. Quality bits cut through this steel like butter.











    I bought new lines but ended up using the existing E38 lines. The E60 rotors have 2 retainer screws but the e38 hub only has one. Which is where the only issue comes in. I'm not sure if the E60 center bore is just slightly larger or the ECS hats are a bit large or what. The slop causes a small vibration since the rotor can shift a bit. I'll add the second screw or install a couple of hardened dowel pins.
    All in all I like it and massively cheaper than the Brembo GT set. Plus now I have one more genuine M part on my non-M car.
    Trevor
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    Nice Job, BTW did u fill in the OEM holes with oem bolts for rigidity?Here is Pkroton`s E60 write up back in 2007- - - Updated - - -http://www.bimmerboard.com/forums/posts/878049/
    2000 740i Sport

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    tmaxx445's Avatar
    tmaxx445 is offline E38 6 Speed Club Member! BMW CCA Member
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    E60 M5 front brakes

    Looks great Trevor!
    What is the piston bore diameter though; does it seem okay with the stock master?


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    Quote Originally Posted by cazal740i View Post
    Nice Job, BTW did u fill in the OEM holes with oem bolts for rigidity?Here is Pkroton`s E60 write up back in 2007- - - Updated - - -http://www.bimmerboard.com/forums/posts/878049/
    Not yet. Ran out of time this evening. I'll cut down some old VW lug bolts to fill the holes.

    - - - Updated - - -

    Quote Originally Posted by tmaxx445 View Post
    Looks great Trevor!
    What is the piston bore diameter though; does it seem okay with the stock master?


    Sent from my iPhone using Tapatalk
    I'm not sure yet. I only have 5 miles or so. I'm gonna bleed them again and see what happens once the pads fully seat.
    Trevor
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    Nice!

    Quote Originally Posted by 007008 View Post
    The E60 rotors have 2 retainer screws but the e38 hub only has one. Which is where the only issue comes in. I'm not sure if the E60 center bore is just slightly larger or the ECS hats are a bit large or what. The slop causes a small vibration since the rotor can shift a bit
    As a note, with the e60 Brembo hats I only run the one retainer screw. Once the lug nuts are in, rotor does not shift

    Craig

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    Quote Originally Posted by tmaxx445 View Post
    Looks great Trevor!
    What is the piston bore diameter though; does it seem okay with the stock master?


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    I don't see why not, my original MC works with 8pot front and 4pot rear BBK Setup
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    Quote Originally Posted by NordmanMg View Post
    I don't see why not, my original MC works with 8pot front and 4pot rear BBK Setup
    It's a great questions to ask none the less. The only thing I now wonder is if the OP plans on upgrading the rears as well otherwise, the whole brake bias will be thrown off. This is why it's important to upgrade with brakes that have been tested like the 750 upgrade, or Brembo, Stoptech, etc. you get the picture.

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    MAx , you have 8 pot front and 4 pot rears.. Sure it works fine for you, glad you don't have to upgrade the MC but have you taking the car on a windie mountain up or down? Im sure you`ll get some brake fade with OEM MC
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    Fabian - Two things cause brake fade, well maybe three - pads and rotors getting hot and the brake fluid itself getting hot and boiling. The master will cause a pressure problem if too small for the total piston sizes and amount of fluid pressure required to cause travel....
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  10. #10
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    Quote Originally Posted by cazal740i View Post
    MAx , you have 8 pot front and 4 pot rears.. Sure it works fine for you, glad you don't have to upgrade the MC but have you taking the car on a windie mountain up or down? Im sure you`ll get some brake fade with OEM MC
    Oh trust me, I drive the hell out of them week after I installed them, there is a lot of nice curvy roads up here in Colorado, and they work great,
    and I drove few long distance trips to Illinois and Texas and haven't had any issues
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    Quote Originally Posted by cdh View Post
    Nice!


    As a note, with the e60 Brembo hats I only run the one retainer screw. Once the lug nuts are in, rotor does not shift

    Craig
    I do have a wicked vibration from 40mph-50mph. I thought this was due to the rotor shifting on the center bore. I took the wheel off and Nope, still centered. I do however think I found the source of the vibration. I have spacers on the front which I always thought were 12mm. Turns out they are 10mm but have center bore lip. This rotor hat is fractionally thinner than the other rotor and the spacer, I think, is pressing on the center bore instead of laying flat.
    Trevor
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    Quote Originally Posted by 007008 View Post
    I do have a wicked vibration from 40mph-50mph. I thought this was due to the rotor shifting on the center bore. I took the wheel off and Nope, still centered. I do however think I found the source of the vibration. I have spacers on the front which I always thought were 12mm. Turns out they are 10mm but have center bore lip. This rotor hat is fractionally thinner than the other rotor and the spacer, I think, is pressing on the center bore instead of laying flat.
    I can tell you now that it's the 10mm spacer. Same thing happened when I tried 10mm ECS spacers on my e39. 12mm made it sit flush.

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    Quote Originally Posted by blackknight530i View Post
    I can tell you now that it's the 10mm spacer. Same thing happened when I tried 10mm ECS spacers on my e39. 12mm made it sit flush.

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    I had same thing with 13mm hubcentric spacers (74->72) it disappeared after I did E60 hubs and got wheels on directly
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  14. #14
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    I took the spacers off and the vibration is gone. While holding the spacer on I couldn't get a .002 shim in but putting a bolt in one hole I could see the spacer tilt.
    Pedal travel is no more than before, at least I can't tell a difference. I will bleed them again just to make sure. The car does shed speed awfully quick now and I still have to install the Hawk HPS pads on the rear. I do want to do the e60 rears but that will come later. Fitting those calipers require a machine shop.

    I believe the carriers are cast steel which means I can weld them. So the plan is to grind bolts into a cone shape, thread them in and fill the hole with weld making it solid. Then build up the surface around the bolts so the mount ears sit on solid flat surface.
    Other than that I'm happy with it and even with the higher priced ECS rotors I'm into this set from about $1300.
    Trevor
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    only need to make 2 new holes or did you mill down the bracket to get the correct offset?

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    Quote Originally Posted by Norwegian E38 View Post
    only need to make 2 new holes or did you mill down the bracket to get the correct offset?
    The offset is correct. Just need new holes but they are not on the same plane as the e60 ones.
    I'm in the process of fitting the rears. They are not as simple as the fronts. A couple of things I don't like in the write ups that exist.
    The rotor rubs the backing plate and once the carrier bracket is milled down it's only 9mm thick.


    The holes in the e38 knuckles need drilled out to fit the larger thread size in the brackets making the lugs even thinner, which I also don't like.
    Oh, and there is also the larger parking brake shoes to fit. And of course the cables have different style ends.

    The good news is I have a plan for all of these issues. The brackets are at the machine shop right now and I have a few bits on order to hopefully solve the issues.
    Trevor
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    Fantastic work trevor as usual!

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    very nice work. does anyone have any sort of adapter bracket or adapter parts to allow the M5 caliper to hang correctly? I would love this mod on my '00 750iL (I know the 750 brakes are already upgraded from the factory, but they still require a lot of leg force when stopping, since it's a heavy car - and that's with new pads, rotors, and brake fluid). Im hoping this mod would make a big difference in stopping power.
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    Wow.. nice work!

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    Great mod, Trevor!

  21. #21
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    thank you
    i dont look forward to mount rear brakes.
    i got mine m5 calipers yesterday, and OMG they are HUGE!!!
    getting some zimmerman discs, at aprox 350$ each...

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    Quote Originally Posted by serious7series View Post
    very nice work. does anyone have any sort of adapter bracket or adapter parts to allow the M5 caliper to hang correctly? I would love this mod on my '00 750iL (I know the 750 brakes are already upgraded from the factory, but they still require a lot of leg force when stopping, since it's a heavy car - and that's with new pads, rotors, and brake fluid). Im hoping this mod would make a big difference in stopping power.
    no there is nothing that I've seen. Very few have been done. In the last pic I posted is the caliper bracket sitting on top of the knuckle's mounting ears. The 2 need to occupy the same space, so something has to be cut away.
    Here is the size difference in the parking brake shoes


    Yes, I know the shoes look terrible. I have new ones. These are off my e39 m5 which happens to be the same as the e60 ones
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  24. #24
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    Quote Originally Posted by Norwegian E38 View Post
    a lot of bmw uses same shoes as m5
    http://bmwfans.info/parts-catalog/34416761293/
    Looks like the E38 was the last to use the older smaller style.
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    When I installed the m5 rear bbk on my e39 528 touring, the stock shoes worked fine inside the m5 rotors. The outside diameter was the same but the m5 shoe was wider. Just a little tidbit of info.

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