[ThomasR]

Originally Posted by E90705

If you were to do the pads over again would you go with the Akebono pads again? If no which ones?

Let me also add what I've found. The F30 guys swear by Centric Posi-Quiet 104 series Semi-Metallic pads. They are the only pad they've found that has a good initial bite along with very low dust. I believe these are produced by their StopTech division. If I were to do it over I do these both front and rear.

Here are the part numbers:

104.15610
https://www.rockauto.com/en/moreinfo...sn=428&jsn=428

104.14730
https://www.rockauto.com/en/moreinfo...sn=426&jsn=426

Both of these are also found at Tire Rack, Amazon, and lots of other places.


They also make these for the X5 50i and when I upgrade to those calipers and rotors I'm going with the Posi-Quiet's Front & Rear.

[hardparker]

Originally Posted by ThomasR

Ok guys it looks like there's a little more to the G30/M5 retrofit than an adapter ring. I wrote Tro-Nik yesterday and asked if we could buy the ring from him and also what its size is.

This is what he wrote back:
You need a washer to install caliper
And need to cut the pads by the internal radius. So you need cnc
We have 2 kit
- 2 washers
- 2 adapters
- all bolts

And second
- first kit
- modified pads

I'm not sure what cutting the pads means but I don't like that we can't just buy off the shelf pads. I asked for more information along with prices.

Ah, they have to mill the pads to clear that rotor hat after all. That sucks. Thanks for looking into it.

Originally Posted by x3sm

Will you be able to get a few sets produced?

Thanks

Yes, I'm getting a small batch of spacers made and proper bolts to accompany. I'll do a write up for the install in a new thread.

Originally Posted by ThomasR

So when the F30 and F15/F16 guys upgrade their brakes they say coding makes a huge difference:

https://f15.bimmerpost.com/forums/sh....php?t=1178827

https://f30.bimmerpost.com/forums/sh....php?t=1146622

The coding procedure on an F30:

https://f30.bimmerpost.com/forums/sh...d.php?t=929406

Do we have the option to code for this SPBR, SPBR_18_ZOLL_SPORTBRAKE?

I haven't done a coding session in forever and didn't check for it. I've put questions out before after doing research on this. I'll check it the next time I have time to do a little coding, since there's a few other things I want to code, like launch control (pft!) and sailing on the trans.

[E90705]

Originally Posted by ThomasR

Let me also add what I've found. The F30 guys swear by Centric Posi-Quiet 104 series Semi-Metallic pads. They are the only pad they've found that has a good initial bite along with very low dust. I believe these are produced by their StopTech division. If I were to do it over I do these both front and rear.

Here are the part numbers:

104.15610
https://www.rockauto.com/en/moreinfo...sn=428&jsn=428

104.14730
https://www.rockauto.com/en/moreinfo...sn=426&jsn=426

Both of these are also found at Tire Rack, Amazon, and lots of other places.


They also make these for the X5 50i and when I upgrade to those calipers and rotors I'm going with the Posi-Quiet's Front & Rear.

thoughts on EBC yellow or red stuff pads matched with their rotors? i tend to prefer solid OE blanks but these EBC slotted USR rotors caught my attention.

https://ebcbrakes.com/product/usr-slotted-rotors/

https://www.amazon.com/EBC-Brakes-S9...ebc+brake+pads

Most likely will just get Zimmerman OE blank solid rotors with Centric Posi-Quiet 104 series Semi-Metallic pads or something OE.

[ThomasR]

Originally Posted by E90705

thoughts on EBC yellow or red stuff pads matched with their rotors? i tend to prefer solid OE blanks but these EBC slotted USR rotors caught my attention.

https://ebcbrakes.com/product/usr-slotted-rotors/

https://www.amazon.com/EBC-Brakes-S9...ebc+brake+pads

Most likely will just get Zimmerman OE blank solid rotors with Centric Posi-Quiet 104 series Semi-Metallic pads or something OE.

The consensus I see is EBC rotors are not generally liked, even using their pads with them. People are reporting warping and other issues.

What they say on the pads is:
Yellowstuff = a lot of dust, don't work well until hot
Redstuff = low dust, work well cold even better when hot. I can't find much anything on initial bite but no one has said they are bad so they should be a safe bet.

I don't think there nearly as many running Redstuff's than there are the Posi-Quiet so there's not much 'data' to know for sure.

[hardparker]

Originally Posted by ThomasR

The consensus I see is EBC rotors are not generally liked, even using their pads with them. People are reporting warping and other issues.

What they say on the pads is:
Yellowstuff = a lot of dust, don't work well until hot
Redstuff = low dust, work well cold even better when hot. I can't find much anything on initial bite but no one has said they are bad so they should be a safe bet.

I don't think there nearly as many running Redstuff's than there are the Posi-Quiet so there's not much 'data' to know for sure.

I've run nothing but EBC pads and lately their rotors, on numerous cars over the past couple of decades. I've stuck with YellowStuff even though they dust the wheels to shit. They bite better than the reds, in my experience, and are far more fade free when pushed. They use to publish the friction coefficient versus temperature graphs of all of their pads and the yellow was superior across the board to the red. Some folks in sub-freezing temperatures have had issues while the yellows are icy cold during the first couple of mornings stops. In normal temps, or once thawed from sub-freezing temps, they're initial bite at first pedal pressure is great.

I haven't had any issues of any kind with four pairs of their rotors. Although, I'll say I dislike the black geomet coating they come with now. In the past, they were zinc coated, which was far superior. I use a wire brush and brake cleaner to remove the geomet and then I repaint the rotor hub with silver high temp spray paint.

I'll add that if you're looking for good braking performance on a budget, you can't beat the pricing combo of their pad and rotor bundled kits. You can typically get a pair of rotors with pads for $20-$60 more than just the pads themselves. You won't get rotors anywhere else for that inexpensive.

[x3sm]

Originally Posted by ThomasR

Let me also add what I've found. The F30 guys swear by Centric Posi-Quiet 104 series Semi-Metallic pads. They are the only pad they've found that has a good initial bite along with very low dust. I believe these are produced by their StopTech division. If I were to do it over I do these both front and rear.

Here are the part numbers:

104.15610
https://www.rockauto.com/en/moreinfo...sn=428&jsn=428

104.14730
https://www.rockauto.com/en/moreinfo...sn=426&jsn=426

Both of these are also found at Tire Rack, Amazon, and lots of other places.


They also make these for the X5 50i and when I upgrade to those calipers and rotors I'm going with the Posi-Quiet's Front & Rear.

Those pads are mega cheap on RockAuto... I might give them a try. Can you link review by F30 people? I'd like to read more about them from a user.

[ThomasR]

Hardparker,

I didn't realize the 2017- M40i G01 Front Calipers were different and look the same as the G30's. They are a different part number than the G30. So will the G01 caliper and disc bolt right up to the F25???

[hardparker]

Originally Posted by ThomasR

Hardparker,

I didn't realize the 2017- M40i G01 Front Calipers were different and look the same as the G30's. They are a different part number than the G30. So will the G01 caliper and disc bolt right up to the F25???

The caliper will, but the rotor won't because it's the new, smaller wheel bolt pattern.

[ThomasR]

Originally Posted by hardparker

The caliper will, but the rotor won't because it's the new, smaller wheel bolt pattern.

Well that's dumb. Thanks BMW.

[ThomasR]

1. I wonder if the different G01 calipers will work without spacers.
2. Are the G01 rotor hats shaped where we can't have them redrilled for our bolt pattern?

[hardparker]

Originally Posted by ThomasR

1. I wonder if the different G01 calipers will work without spacers.
2. Are the G01 rotor hats shaped where we can't have them redrilled for our bolt pattern?

I don't know about the caliper fitment and spacers without test fitting, and I don't have any of the new style calipers to test with. I'll hazard a guess and say that the caliper would not require a spacer with the new rotor. Just a guess, though.

The hats could be re-drilled, I think. What would matter would be the hub flange's diameter fitting within the rotor hat dimensions. That would require test fitting as well. Looking at the hub flanges on realoem, I'd say it looks kind of iffy.

[Victoracer]

Maybe we can change over to the x4 m40i spindle and hub?

[hardparker]

Here's a little teaser pic for the X5 50i 365x36mm two-piston caliper setup on my X3. More to come in the days ahead.

[E90705]

Originally Posted by hardparker

Here's a little teaser pic for the X5 50i 365x36mm two-piston caliper setup on my X3. More to come in the days ahead.

Damn you're good

[Victoracer]

So wouldn’t the e70 x5m 4 pots bolt up with the same spacing?

[hardparker]

Originally Posted by Victoracer

So wouldn’t the e70 x5m 4 pots bolt up with the same spacing?

Yeah, I just sold the sweet set of those that I had to one of the F10 5-series guys because they didn't clear my 19" wheels. Cheaper to recoup the cash from those than pony up a few thousand bucks for a new set of wheels and tires.

But, yes, with the spacers you can run any E70, E71, E72, F15, F16, F85, F86 front brake setup that you want on the front of your F25 or F26! The debris/heat shield will require a little trimming, but nothing major. Optionally, you could just bend back the interfering portions of the shield.

The setup I'm ending up with, the X5 50i brakes, are by far the best bang for the buck if you source the calipers used and price shop new rotors and pads. I spent nearly $900 on those remanufactured, like new, E70 X5M calipers, which I thought was pretty cheap, but still expensive. That setup would have been closer to $1500, than the $500 that I'll spend on the 50i setup.

[FranzX3M]

I just upgraded my brakes using EBC Red Stuff pads all around, braided brake lines, new drilled rotors and full brake bleed. I am very satisfied the with improvement. Firmer pedal and a lot more bite but not touchy at all. Now I can brake with confidence and not pucker up in an emergency brake situation and I don't have to press the pedal as hard. The pads are much better than stock. There is a bit more brake dust but its not too bad and washes off easy enough.

[hardparker]

Got the brakes finished today. No major issues. They stop harder. Still need to bed them in better. I'll have spacer kits available in about three weeks and I'll do a write up about the install later this week.

[pokerface]

Very nice. Do you still expect them to be able to fit behind standard 18" wheel?

[Victoracer]

Do you have springs installed? I’m curious how much dive the car will have with an increased bite up front. Im convinces with a stiffer front end and larger brakes or better clamp force, braking should be hugely improved. And there is lots of room for improvement. Congrats and thanks for all your effort.

[hardparker]

Originally Posted by pokerface

Very nice. Do you still expect them to be able to fit behind standard 18" wheel?

I'm not sure if they'll fit under 18s or not. Someone will have to try. Just eyeballing it, I'd say there's maybe 5/8" clearance from the caliper body to wheel, so it might work, depending on the wheels.

Originally Posted by Victoracer

Do you have springs installed? I’m curious how much dive the car will have with an increased bite up front. Im convinces with a stiffer front end and larger brakes or better clamp force, braking should be hugely improved. And there is lots of room for improvement. Congrats and thanks for all your effort.

I've got sport EDC suspension. There's still plenty of dive, but stopping power is significantly increased, I'd say. I wish I'd done some Dragy stop testing with the stock brakes. I didn't, but I will with the new ones at some point. Anyone with a Dragy and stock X3 brakes willing to get some baseline numbers for us?

[hardparker]

A box of spacers showed up today! Spacers are 304 stainless steel. Hardware includes grade 10.9 OEM equivalent bolts and Nord-Lock safety washers, both zinc geomet coated. Who's ready to rock some bigger brakes?

X5 brake upgrade for X3 or X4

X3/X4 to X5/X6 brake upgrade adapter kit