Tuesday, January 17, 2012

323i Rear Disk Brake [upgrade]



e21 323i trailing arms fitted with e30 disc brakes





15 comments:

  1. Guillermo HernándezJanuary 17, 2012 at 8:24 AM

    Why not use 323 disc brake?
    E30 are bigger?

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  2. it is argued that the surface area is larger, the number of pistons are increased from 2 to 4, but some modifications for fastener is required...this is NOT my choice...this is just something i posted from another site because it is discussed frequently...i have e21 323i trailing arms and 323i disc brakes...

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  3. E21 Rear Brake disk + E30 Brake Support with little modification - best variant IMHO if you want to use stok brake dist
    http://i019.radikal.ru/0803/3d/f466ed23a0b7.jpg
    http://i045.radikal.ru/0803/20/3129837ae045.jpg
    Pictures are not mine, they are from a user of our forum, Stig82

    http://s3.images.drive2.ru/car.journal.photos/x6/4400/000/000/347/022/88ce7288acb6a142-main.jpg this from another user (Stereo-e21)
    280mm disk from e36 and support from E23 (before Rebranding)

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  4. Guillermo HernándezJanuary 18, 2012 at 5:43 AM

    For normal use, do you think upgrade from rear drum to rear disc is a good choise or it is a bad spend of money?

    Regards,

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  5. Good choise i think, but at a regular driving hard to feel the difference.

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  6. vic...that 280mm disc you are showing is interesting to me because there is a lot of discussion over here regarding the installation of mini cooper discs which are the same size...that installation is rumored to require some minimal modifications giving the car an increased braking surface...i think this is a great idea...i am slowly working on the rear end of my car...the sub-frame is only installed with a little more than finger tight bolts...i need 1 more disc brake rebuild kit installed and a set of rear shocks and the bbs lowering springs i bought about a year ago...then the drive shaft/propeller from the freshly rebuilt transmission and engines...this summer i plan on driving...and i can't hardly wait...

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  7. btw...i almost forgot to mention that a lot of guy here are using the volvo 240 front brakes instead of the 323i front brakes which my '77 came with stock...the reason is the 240 brakes have 4 cylinders instead of 2 per caliper...but this application requires splitting the brake lines...no big deal but still needs done if you go in that direction...if you search this blog you will find pics i posted...i think i'm doing it later and using a e12 master cylinder instead of the e21...the e12 master cylinder has the 2 extra ports which eliminates the need of splitting the brake line...either way its seems like the right thing to do at some point...thanks for the comment...

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  8. Oh btw Dave, Hub is a hybrid hub E23 and E21, 5x120.
    http://s41.radikal.ru/i094/0903/a4/655fcb8085a2.jpg

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  9. I think Volvo is not such a good idea, because we make a brakes which will be blocked (small car weight, small disc radius, and big surface area) not good. I think the good front brakes upgrade is Brake Caliper from E36\46 (1 Piston) 280 mm disk from E34 (but need instal 5x120 hub from e12) - it's similar an M3 E30 (chek the M3 ETK ;))

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  10. the volvo upgrade isn't about the disc brake radius but rather it is about increasing the cylinder numbers from 2 pistons to 4 pistons...it is the same brake configuration as hartge utilized...that's why i've considered it and am planning for it...

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  11. vic...take a look at this...i found it interesting...

    http://the320i.blogspot.com/2011/03/volvogirling-front-brake-upgrade-is.html

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  12. About Front brakes with E36\46 caliper, I was wrong a little
    Е34 disk brake 300x22, E36 286x25, because of varying thickness, we need caliper from e34. srry, i forget this)

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  13. vic...what did you think of the discussion i linked...utilizing the mini cooper front discs...obviously, this would depend on availability of parts...but the opinion of many here in the states the 5 lug upgrade from the 4 lug stock hubs is not worth it...i had the opportunity to go to a 5 lug but the costs were too much on something that is only optional...

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  14. Mini coper rotors + Volvo Calipers - awesome, the question is what to do with the ET of the rotor? ET of rotor "mini" is the same as the E21?

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  15. i understand a little more than a 'rimming' or elongating the mounting is required...the girling upgrade is cheaper than stock, better performing than stock, a hartge featured option...not bad for a day's work...

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