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Thread: Any good aftermarket rotors on ebay for my 84 733i?

  1. #1
    Join Date
    Dec 2011
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    San Francisco, CA
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    My Cars
    1984 733i 1991 318is

    Moon Any good aftermarket rotors on ebay for my 84 733i?

    hi since my car was sitting for 6 yrs but is now running great (just passed smog) i would definitely like to improve the braking. any product recommendations on rotors and brake pads and product part number and what site or ebay site you got them off?? thanks guys.
    Last edited by makuso; 02-05-2013 at 07:32 PM.

  2. #2
    Join Date
    Jun 2010
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    TX
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    4,487
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    1983/84/85 745i

    Thumbs up

    Stock brakes are pretty good, there are some pad upgrades around from places like EBC. Otherwise, normal street pads are probably fine...even stuff from your auto store would work fine.

    I would stick to well known euro rotor brands like Bale, ATE, Brembo, etc. My luck has been hit and miss with cheap aftermarket.

    Also a great upgrade for low money is a set of stainless brake hoses. There are six, so you know. Buy yourself an 11mm line wrench to help change them. Trying without is a waste of time.

    Oh, apparently some set of E34 rear rotors bolt up and are an upgrade since they are vented. E32 I suppose could too for V8 and V12 cars.
    I make E23 parts.
    09/1983 745i (stolen spring '13 around Houston, TX Achatgruen on nutria buffalo. 8481080)
    10/1984 745i
    11/1984 745i
    11/1984 735i (10:1-265/6)
    Ford, MB, and GM round out the pack.



  3. #3
    Join Date
    Mar 2006
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    87 535i/84 €735i/8
    The rear vented rotors from e32 740/750 do bolt up but wouldnt do much good without the asociated caliper from the same car... ;-)

    Considering the E23 front rotor has the same swept area as the 540i, I think doing the big rear brakes is a worthwhile upgrade.

    I know I love them in my E28. No more nose dive.
    --Jay3->Sic gorgiamus allos subjectatos nunc
    84 €735i manual, 88 528e/i
    Motronic 1 and 1.3 wiring
    Transmission & Diff gearing sheet

  4. #4
    Join Date
    Jun 2009
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    e23 e36 e46
    I'm pretty sure the pads are the same for e23 and e28, so there are plenty of options for performance pads.

    Someone correct me if I'm worng

  5. #5
    Join Date
    Mar 2006
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    87 535i/84 €735i/8
    Front pads?
    The M5/M3 pads can be interchanged, but the normal 528/533/535 calipers are single piston and shaped completely different.
    --Jay3->Sic gorgiamus allos subjectatos nunc
    84 €735i manual, 88 528e/i
    Motronic 1 and 1.3 wiring
    Transmission & Diff gearing sheet

  6. #6
    Join Date
    Dec 2012
    Location
    topanga CA
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    84 728i,325Ci, 77 R100RS
    Just FYI, Porterfield Brakes will put any lining known to man on existing worn out pads. Not cost effective compared to Pep Boys, but for oddball stuff that's NLA (like old Maserati E brake pads) or fancy racing specs, another way to go if you're in search of max brakes. Lots of interchange and pix too. (Did you know our front pads interchange with Maserati BiTurbo?)

  7. #7
    Join Date
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    Quote Originally Posted by Jay535is View Post
    Front pads?
    The M5/M3 pads can be interchanged, but the normal 528/533/535 calipers are single piston and shaped completely different.
    Yes, the fronts. I didn't do the rears yet. Here is everything the fronts interchange with.

    Front for BMW: 77-84 733I, 84-86 735i, 87-88 M5, 87-88 M6, 79-81 528i, 9/76-79 530i // MASERATI: 82-88 Biturbo, 83-88 Zagato Spider, 82-88 425, 82-88 428, 86-88 430

    Quote Originally Posted by andyleonard View Post
    Just FYI, Porterfield Brakes will put any lining known to man on existing worn out pads. Not cost effective compared to Pep Boys, but for oddball stuff that's NLA (like old Maserati E brake pads) or fancy racing specs, another way to go if you're in search of max brakes. Lots of interchange and pix too. (Did you know our front pads interchange with Maserati BiTurbo?)
    I'm running porterfield front pads. AP163 is the part number

  8. #8
    Join Date
    Dec 2011
    Location
    San Francisco, CA
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    My Cars
    1984 733i 1991 318is
    Quote Originally Posted by Jay535is View Post
    The rear vented rotors from e32 740/750 do bolt up but wouldnt do much good without the asociated caliper from the same car... ;-)

    Considering the E23 front rotor has the same swept area as the 540i, I think doing the big rear brakes is a worthwhile upgrade.

    I know I love them in my E28. No more nose dive.
    Hey el guapo, finally planning to do the rotors this summer so i can make midtown euro meetup so...Just wanted to ask you, so if I buy a rear and front rotor break kit off ebay for e39 540i it will be direct fit and I won't have to change calipers etc??

  9. #9
    Join Date
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    87 535i/84 €735i/8
    NOOOOO!
    I used rear 740 rotors WITH the 540/740 calipers and trailing arms/axles. Just remember that the 540/740 calipers are the same, but the rotors have different interior hat offset. Since I changed my entire trailing arm assembly to the 740 pieces, I used those rotors. But the 540 rotor might work better with the original trailing arms/hubs.
    Remember that the 540/740 rear rotors are vented, so almost twice the thickness of the original solid rotors. The stock calipers wouldn't be able to fit around them.
    Front brakes do NOT need to be 'upgraded', they are perfectly fine, just use better pads. The rotors and calipers are plenty capable.
    --Jay3->Sic gorgiamus allos subjectatos nunc
    84 €735i manual, 88 528e/i
    Motronic 1 and 1.3 wiring
    Transmission & Diff gearing sheet

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