[hamadyr]

Note to feuer:

Been quite busy with no time to take the rear apart and validate measurements before cutting ...
Calipers will go out for modification based purely on your numbers :-)

The big question for you:

The mounting holes on the hub can be enlarged with a drill / reamer or do they need to be enlarged sideways for the caliper to clear the disc ?

I recall a sketch in of your posts showing that they needed to be enlarged outwards (vs concentric) but cannot seem to find it any more.

[LMB335IS]

Originally Posted by hamadyr

Note to feuer:

Been quite busy with no time to take the rear apart and validate measurements before cutting ...
Calipers will go out for modification based purely on your numbers :-)

The big question for you:

The mounting holes on the hub can be enlarged with a drill / reamer or do they need to be enlarged sideways for the caliper to clear the disc ?

I recall a sketch in of your posts showing that they needed to be enlarged outwards (vs concentric) but cannot seem to find it any more.

Both. F30 caliper bracket bolt is a larger diameter and the hole needs to be elongated outwards a couple mm's for the caliper to clear the rotor.

[feuer]

Originally Posted by hamadyr

Note to feuer:

Been quite busy with no time to take the rear apart and validate measurements before cutting ...
Calipers will go out for modification based purely on your numbers :-)

The big question for you:

The mounting holes on the hub can be enlarged with a drill / reamer or do they need to be enlarged sideways for the caliper to clear the disc ?

I recall a sketch in of your posts showing that they needed to be enlarged outwards (vs concentric) but cannot seem to find it any more.

The bolt on F30 is larger so you can re-drill it, make it wider, moving away from the hub. I pretty straight forward.

[feuer]

Per Turkish Mafia request here is a photo of OEM style 359 19" over 370/380mm calipers:

[Turkish Mafia]

Originally Posted by feuer

Per Turkish Mafia request here is a photo of OEM style 359 19" over 370/380mm calipers:

This looks really great! Thank you for posting this.

[Turkish Mafia]

I've been reading this thread in detail.

If using F30 rear m performance calipers, my understanding of the best way to do this is to take 3.5 mm from the caliper and 3.5 mm from the knuckle.

Is this how it's being mostly done? I'm a little wary of taking 7 mm from just the caliper alone.

[feuer]

Originally Posted by Turkish Mafia

I've been reading this thread in detail.

If using F30 rear m performance calipers, my understanding of the best way to do this is to take 3.5 mm from the caliper and 3.5 mm from the knuckle.

Is this how it's being mostly done? I'm a little wary of taking 7 mm from just the caliper alone.

Best way is to use 535i rear rotor and shave the caliper 4mm. Anyhow, I was the first who mount the rear, with shaved 7mm calipers, and 3 years later, probably 20 track days, still holding up just fine.

[LMB335IS]

Originally Posted by Turkish Mafia

I've been reading this thread in detail.

If using F30 rear m performance calipers, my understanding of the best way to do this is to take 3.5 mm from the caliper and 3.5 mm from the knuckle.

Is this how it's being mostly done? I'm a little wary of taking 7 mm from just the caliper alone.

In a perfect world that would be the best solution but it triples the amount of labor and time by having to remove the rear knuckles and having them machined as well. If it's not your daily, no big deal. In my case I can't really have my car on jackstands for a few days while I get it sorted. With just machining the calipers it's a afternoon job.

[Turkish Mafia]

Originally Posted by LMB335IS

In a perfect world that would be the best solution but it triples the amount of labor and time by having to remove the rear knuckles and having them machined as well. If it's not your daily, no big deal. In my case I can't really have my car on jackstands for a few days while I get it sorted. With just machining the calipers it's a afternoon job.

Machining solely the caliper to 12 mm sounds ideal. However, there was some concern brought up earlier in the thread that the inner pad may drag on the rotor because the caliper isn't completely centered on the rotor if solely the caliper is machined (and not the knuckle).

Any further discussion regarding this?

Thanks.

[feuer]

Originally Posted by Turkish Mafia

Machining solely the caliper to 12 mm sounds ideal. However, there was some concern brought up earlier in the thread that the inner pad may drag on the rotor because the caliper isn't completely centered on the rotor if solely the caliper is machined (and not the knuckle).

Any further discussion regarding this?

Thanks.

I'm on my second rear set and have not experienced any pad drag with neither OEM BMW nor TRW pads.

[Turkish Mafia]

Originally Posted by feuer

I'm on my second rear set and have not experienced any pad drag with neither OEM BMW nor TRW pads.

Excellent! That's all I needed to know. Thank you.

[Turkish Mafia]

Originally Posted by LMB335IS

My guy in Tampa FL charged me $200 or so to do it. He has a custom machine shop specializing in BMW's and does custom machine work, i.e. manifolds, intercoolers, etc. He made a custom fitting for mine since it was the first one he had done. You'd need to cover the shipping though.

Just wanted to clarify something. What do you mean by "custom fitting?" Like a jig to make sure it fits?

[Turkish Mafia]

What numbers exactly did you end up going with?

Originally Posted by hamadyr

Note to feuer:

Been quite busy with no time to take the rear apart and validate measurements before cutting ...
Calipers will go out for modification based purely on your numbers :-)

The big question for you:

The mounting holes on the hub can be enlarged with a drill / reamer or do they need to be enlarged sideways for the caliper to clear the disc ?

I recall a sketch in of your posts showing that they needed to be enlarged outwards (vs concentric) but cannot seem to find it any more.

[LMB335IS]

Originally Posted by Turkish Mafia

Just wanted to clarify something. What do you mean by "custom fitting?" Like a jig to make sure it fits?

Yes. They made a custom fixture for their CNC machine to machine the caliper perfectly.

[Turkish Mafia]

Originally Posted by LMB335IS

Yes. They made a custom fixture for their CNC machine to machine the caliper perfectly.

I have to say... That's really freakin' cool. I'm away from FL for the next 2 mo, but will get this done with them when I'm back. Thanks everyone.

[LMB335IS]

Originally Posted by Turkish Mafia

I have to say... That's really freakin' cool. I'm away from FL for the next 2 mo, but will get this done with them when I'm back. Thanks everyone.

They know their s*#t. Look them up on FB. Fab Factory.

[feuer]

I did mine on bench top drill press 🙈

[Turkish Mafia]

Originally Posted by feuer

I did mine on bench top drill press 🙈

[saddart]

Thought I share this here since someone might be wondering if it will fit. Had it test fitted today s9meone bought it for his 116i also using 18inch OZ rims. 18inch M3 Rims not sure what style.

[Turkish Mafia]

Originally Posted by saddart

Thought I share this here since someone might be wondering if it will fit. Had it test fitted today. 18inch M3 Rims not sure what style.

Looks very nice.

Which method did you go for? Just machining the calipers down to 12 mm?

[saddart]

Originally Posted by Turkish Mafia

Looks very nice.

Which method did you go for? Just machining the calipers down to 12 mm?

Fronts were a direct bolt no modification needed. Haven't considered the rear yet

[Turkish Mafia]

Originally Posted by saddart

Fronts were a direct bolt no modification needed. Haven't considered the rear yet

Oh okay.