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bigger brakes, tt discs, 750i calipers
Posted: Sun Feb 10, 2008 10:25 pm
by midnight
basically guys i hear u can use this combination to fit on an e30 but what about the mounting bracket i heard u have to get one made up, is this right, if so how would i go about getting it done.
and how good is this set up?
cheers
Re: bigger brakes, tt discs, 750i calipers
Posted: Sun Feb 10, 2008 10:54 pm
by siddiqi1
I wonder what the costs are too!
Will these fit under OE BBS alloys?
Posted: Mon Feb 11, 2008 12:00 am
by DRIFTBOY
I've got most of the parts to do this conversion now too, hopefully a few weeks and it'll be done.
You can either get the brackets made, here's a template: -
Or you can get them from
http://www.300mm.de/new/
Not cheap though.
I'm going to enquire at a local engineering company when I get the chance.
Re:
Posted: Tue Feb 12, 2008 5:58 pm
by midnight
are the brackets for salee on 30mm.de for the m5 brakes or the 750i ones? plus i cant understand a think on that site is there anyway of putting it into english?
Re:
Posted: Tue Feb 12, 2008 6:36 pm
by DaveD
Re:
Posted: Tue Feb 12, 2008 6:44 pm
by George_Of_The_Jungle
what material are you going to get the brackets made out of?
Re:
Posted: Tue Feb 12, 2008 7:29 pm
by Templ8e30
I made mine out of 15mm thick steel, no special grade.
Cheers,
Iain T
Re:
Posted: Tue Feb 12, 2008 8:02 pm
by pilt
So what discs are these for?
Re:
Posted: Tue Feb 12, 2008 8:05 pm
by ed325i
Audi TT discs modded to fit.
750/740/540 cailpers.
Brackets.
Re:
Posted: Tue Feb 12, 2008 8:06 pm
by ed325i
Will these fit under OE BBS alloys?
No they will not.
Re:
Posted: Tue Feb 12, 2008 8:08 pm
by pilt
ed325i wrote:Will these fit under OE BBS alloys?
No they will not.
Are 16" wheels ok?
How do the discs need to be modded?
Re:
Posted: Tue Feb 12, 2008 8:48 pm
by Martinaston
You need 1mm taken out the centre i think, so they fit over the hub.
Templ8e30, how have you treated the brackets to stop them rusting ?
Re:
Posted: Tue Feb 12, 2008 8:51 pm
by George_Of_The_Jungle
15mm steel? bit of overkill isnt it?
Re:
Posted: Tue Feb 12, 2008 8:52 pm
by Martinaston
oh, and drilled to the 4 bolt pattern

Re:
Posted: Tue Feb 12, 2008 8:56 pm
by pilt
Looking on the E30.de looks like these probably need 17" wheels for the 312mm TT discs?
ANyone running this with 16"?
Re:
Posted: Tue Feb 12, 2008 8:59 pm
by Martinaston
The Audi A4 1.8 turbo 280mm disc's fit under the 15" BBS (not the Quatro ones)
Re:
Posted: Tue Feb 12, 2008 9:48 pm
by Ant
the 312 and 750 caliper combo can be squeezed under a 16" Borbet B, you'll need to grind all the casting flash from the 750 caliper, no real issue
only leaves 3mm running clearance, so make sure the wheelbearings are good ( Kevin no worries there lol ! )
theses are all the brakes you'll need on an E30, tested in anger with 350+ HP , no issues
Make sure the ABS works, locked fronts @ 100+ is not good, and they will lock !!
Re:
Posted: Tue Feb 12, 2008 10:14 pm
by pilt
Ant wrote:the 312 and 750 caliper combo can be squeezed under a 16" Borbet B
What about Borbet C's? Are they a similar internal size?
Cheers
Dan
Re:
Posted: Tue Feb 12, 2008 11:00 pm
by maggspower
what about 16" alpinas any one tried them with the 750 calipers and 312 discs?
Re:
Posted: Tue Feb 12, 2008 11:06 pm
by benjy
What'll fit under 15" BBS then?
Re:
Posted: Wed Feb 13, 2008 1:50 am
by topspark
benjy wrote:What'll fit under 15" BBS then?
Yeh , same question from me .
What are the max size discs and calipers you can get under the BBS's??
lee
Re:
Posted: Wed Feb 13, 2008 6:46 am
by alexbaby88
topspark wrote:benjy wrote:What'll fit under 15" BBS then?
Yeh , same question from me .
What are the max size discs and calipers you can get under the BBS's??
lee
I'd like to know too...
Re:
Posted: Wed Feb 13, 2008 8:52 am
by DaveD
285mm
Re:
Posted: Wed Feb 13, 2008 11:23 am
by George_Of_The_Jungle
how much do the 750 calipers cost???
Re:
Posted: Wed Feb 13, 2008 4:57 pm
by Templ8e30
Martinaston wrote:Templ8e30, how have you treated the brackets to stop them rusting ?
I painted them with some stuff from work called Galvafroid, basicly a zinc paint. Works very well on the steel brackets I put outside 7 years ago, still look new.
I paid £100 from a BMW breaker for my E34 3.6l M5 single pot calipers (complete with cast in ///M logo's

), was disappointed when they turned up though as they were fooked, needed a complete rebuild.
Cheers,
Iain T
Re:
Posted: Wed Feb 13, 2008 5:01 pm
by agreen
as dave says 285mm is the very biggest that will fit under 15" bss wheels
other 15" wheels well thats a diffrent story
for 15" wheels maybe go for wms i think or do a proper job and go high spec big brake kit lol in red to

- - - -

Re:
Posted: Wed Feb 13, 2008 5:40 pm
by Aziz
I got a pair of E38 735i Brembo disc £54.00
A Pair of TT disc Cross Drilled disc £109.00 + £10 for increasing bore by 1mm and redrilling the wheel lug holes.
I need to design a bracket and get it fab'd in between doing the gearbox and selector shaft seals changing the ECU and running my own business.
Where does my time go!!!!!!
Re:
Posted: Wed Feb 13, 2008 5:54 pm
by midnight
ant have u got a bracket handy as a template to bring to a machine shop and say make this....
Re:
Posted: Wed Feb 13, 2008 5:57 pm
by agreen
I got a pair of E38 735i Brembo disc £54.00
A Pair of TT disc Cross Drilled disc £109.00
Great you have now four discs
should be inteteresting lol
Re:
Posted: Wed Feb 13, 2008 6:05 pm
by Aziz
Great you have now four discs
should be inteteresting lol
Cheers Mr Green can I interest you in a Pair or 2

Re:
Posted: Wed Feb 13, 2008 7:36 pm
by Andy335Touring
I'm going to try this soon with some 16"x7.5" Azev A's, fingers crossed !

Re:
Posted: Wed Feb 13, 2008 8:10 pm
by agreen
Cheers Mr Green can I interest you in a Pair or 2
im guesing by my avatar the answer will be no

Re:
Posted: Wed Feb 13, 2008 9:14 pm
by pilt
Guys,
Here is a good thread on the 750i brake conversion:
http://www.e30zone.net/modules.php?name ... ht=wilwood
Re:
Posted: Wed Apr 23, 2008 10:43 pm
by Juriic
Hello!
Does Alpina 7x16 rims fit with E38 Brembo 4-pot aluminium calipers with S3/TT rotors 312x25 mm or no way?
Tnx in advance!
Re:
Posted: Fri May 28, 2010 7:30 am
by alexbaby88
I decided to go with a BBK from Massivebrakes.com. Top notch stuff.