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Old 09-27-2011, 01:50 AM   #1
RCV7
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Arrow Rear caliper upgrade question

Hello, everyone
I’m doing the e46 330i calipers, carriers and rotors for the front brakes of my 2.8 swapped ti and found a thread here about using either an e34 M5 or e32 735i calipers for the rear to balance out the car’s bias: http://www.318ti.org/forum/showthread.php?p=245846
Our ti rear rotors are 272x10mm, the e32 735i rear rotors are 300x12mm and the e34 M5 rear rotors are 300x20mm.
1. Will I have any problems fitting the 735i’s rear calipers on the ti rotors because of the different sizes?
2. Must I use OEM rear calipers or can I use aftermarket ones like ATE or Centric? Aftermarket seem to be plentiful. Thanks in advance
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Old 09-26-2014, 02:51 AM   #2
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Default ti rear caliper upgrades

Sure has been nice of people to respond so quickly. I am in the middle of this myself and am likely to use the E34 525i rear calipers since they use 38mm pistons over the 34mm of the ti. I will be breaking down everything I've personally done in a different thread and give a report on it when finished, along with the link posted here. In the meantime, what were your results over these past years?

Last edited by Hotredti; 09-26-2014 at 02:16 PM. Reason: Wrong Piston Diameter (was 36).
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Old 09-26-2014, 04:30 AM   #3
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I have been running the e46 front & e34 rear setup for over a year and have been very happy... It is a very good setup and maintains the front/rear bias nicely while upping the brake power.
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Old 09-26-2014, 10:18 AM   #4
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Hmm I've been running the e36 m3 brakes up in front and the rear. ☺ custom adapter made out of space grade aluminum. Using 1 series rotors for the rear (fit like a glove, same dimensions and ebrake is fully functional). Unfortunately I don't have the files for them or the means to duplicate them. It's do-able tho.
It's been about a year or a little more than a year with this setup.
Front
Click image for larger version Name:	uploadfromtaptalk1411723042818.jpg Views:	323 Size:	31.8 KB ID:	15259
Rear
Click image for larger version Name:	uploadfromtaptalk1411723084510.jpg Views:	332 Size:	19.6 KB ID:	15260
Click image for larger version Name:	uploadfromtaptalk1411723106159.jpg Views:	325 Size:	30.1 KB ID:	15261
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Old 09-26-2014, 02:29 PM   #5
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Very nice setup; sharp. I am going for a BMW Lego assembly only, using factory parts. Everything up front is factory M3 with the M3 master cylinder and non-traction control '95 318i M12-M10 hard brake line to adapt the master cylinder to the stock '98 ABS pump. Had to curl the line in a loop to install since the M10 fitting is on the top at MC and M12 is at the ABS pump. I am getting the rear E34 Calipers after work and installing this weekend. I think that is going to be a fairly painless setup.
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Old 10-26-2014, 11:52 PM   #6
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I have also upgraded my front brakes to e46 330 ones (325x25). Bolton solutin and works very well. But in the rear i have still drum brake. I want to change drum brakes out since i visit track sometimes and i have already 323ti trailing arms with hubs.

I need carriers, caliber housings, rotors, pads.

Do i understand right: If i take original TI carrier and put there e32 735i or e34 M5 caliber housing then its all bolton and i can use original TI rotor 272x10mm? Or i can use e34 m5 300X10mm rotor? Or some another model rotor?

Or are theres some other cheap solutions like mixing up another models carriers and caliber housings?

In my country, m3 and z models are rare and expensives.
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Old 10-27-2014, 08:02 PM   #7
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From my understanding, the rotors from the ti must be used. However the caliper from the early American m5s which had 10 mm thick rear rotors, or 735i calipers will fit in the carrier, as well as connect to the lines.
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