205 Master cylinders
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Thread: 205 Master cylinders

  1. #1
    Fellow Frogger! flock's Avatar
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    Default 205 Master cylinders

    G'day

    I've been looking at many threads however they all concern big brake upgrades.

    Looking to replace my leaky and corroded master cylinder in my phase 1.5 205 (1.6 fronts, drum rears). I am going to upgrade to 306 247mm front calipers and S3 disc rears.

    Looks like my options are 20.6mm and 22mm. 23.8 is out of the question I like progressive brakes. Seems like there are 2 systems: ATE and Bendix although I can't see anything stamped on my MC.

    From your experiences, will 22mm be too much for this new setup or should I stick with the original 20mm?

    Cheers,
    Lach



    Sent from my E6653 using aussiefrogs mobile app

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  2. #2
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    Would the m/cyl likely be the same as the calipers ?

  3. #3
    1000+ Posts PugMonkey's Avatar
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    I have 23.8 master cylinder on my 205 with the 283mm disks as the larger calliper pistons need more fluid to operate. If you like a progressive pedal with a 247 disk, I would stay with the 20mm MC. The pedal will travel a bit further toward the floor but there will also be more progression.

    In opposite - putting a 24mm MC on standard size disk will give virtually no progression and instant nose removal when the brake pedal is depressed.
    ....now watch a Peugeot turn into a corner!

  4. #4
    1000+ Posts PeterT's Avatar
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    22mm works well on 266mm brakes. I'd also stay with 20.6 for 247mm.

    '92 205 Mi16
    '90 Mi16x4

  5. #5
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    Good advice all round, I put the 306 master (23.8mm) with the 306 front pots and rear 205 discs and there is almost instant firm pedal feedback, looking forward to the first road run!
    87 S1 205 GTI / GTI6 powered a project underway
    306 convertible (gti6 candidate)
    307 HDi wagon
    407 HDi wagon

  6. #6
    Fellow Frogger! flock's Avatar
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    Did you put the 266mm in or 283mm matt?

    I'm wondering if I should get a 22mm cylinder so If I want to upgrade to 266mm in the future it will be adequate, but not too hardcore for my current setup with 243mm

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  7. #7
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    I used 306 rotors at 266mm and calipers to suite on S3 hubs with a 306 23.8mm master cyiinder to suite pots. Otherwise you have pressure differences which either means long peddle travel for small master and large caliper pot or very little to no travel for a larger mater on a smaller pot, eg 306 master on 205 caliper.

    Lets discuss tonight?
    87 S1 205 GTI / GTI6 powered a project underway
    306 convertible (gti6 candidate)
    307 HDi wagon
    407 HDi wagon

  8. #8
    Fellow Frogger! flock's Avatar
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    Well I ordered a bosch cylinder from an eBay seller and they sent a SASIC brand. I know SASIC make a lot of suspension and cooling components but don't know about brakes. Do you think I should return it and demand a bosch part?

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