Midwest Classic Insurance

Visit our community sponsor

Thanks Thanks:  0
Likes Likes:  0
Results 1 to 8 of 8

Thread: Both brake & clutch master cylinders are 0.75"

  1. #1
    Junior Member
    Join Date
    Oct 2024
    Posts
    5
    Post Thanks / Like

    Both brake & clutch master cylinders are 0.75"

    All,

    All 3 master cylinders are 0.75" bore, manual has 3/4" (0.75) Front and 5/8" Rear

    Third one for clutch

    Anyone got the same ? Will get with FFR but putting it out there.

    Thanks
    Attached Images Attached Images

  2. #2
    Senior Member
    Join Date
    Oct 2022
    Posts
    240
    Post Thanks / Like
    All three with my Speedstar were .75"

  3. #3
    Senior Member dstelter's Avatar
    Join Date
    Jan 2019
    Location
    Paige TX
    Posts
    107
    Post Thanks / Like
    Quote Originally Posted by Mark B View Post
    All,

    All 3 master cylinders are 0.75" bore, manual has 3/4" (0.75) Front and 5/8" Rear

    Third one for clutch

    Anyone got the same ? Will get with FFR but putting it out there.

    Thanks
    Yep mine were the same size as well (front and back brakes)

  4. #4
    Senior Member lewma's Avatar
    Join Date
    Jan 2018
    Location
    San Diego, CA
    Posts
    517
    Post Thanks / Like
    Blog Entries
    1
    mine all the same
    Build 1: Mk4 Complete Kit #9312 Ordered 1/27/18, Delivered 3/24/18, CA SB100 Registered 9/11/19 - Gen 2 Coyote TKO600, IRS, Power Steering, Wilwood Brakes, 17" Halibrand.
    Build 2: Gen3 Coupe Complete Kit #309 Ordered 1/25/21, Delivered 6/9/21, CA SB100 Registered 8/27/24 - BluePrint GM 427 LS T56, IRS, AC, Power Steering. Album Here

  5. #5
    Senior Member FF33rod's Avatar
    Join Date
    Jun 2018
    Location
    North Vancouver, BC, Canada
    Posts
    1,589
    Post Thanks / Like
    They seemed to have been using 5/8 on the rear for all the kit models until sometime in the last couple of years and then quietly changed to all 3/4.... Presumably the change can be compensated for with the bias bar to still achieve the same results...

    Steve
    Gen 1 '33 Hot Rod #1104
    347 with Holley Sniper & Hyperspark, TKO600, IRS, 245/40R18 & 315/30R18, DRL, Digital Guard Dog keyless Ignition

  6. #6
    Senior Member
    Join Date
    Mar 2021
    Posts
    171
    Post Thanks / Like
    Yes, that is the same setup they've been using for a while now. Nothing wrong with what you have, and yes, it will work.

    That being said, I would encourage you to do a few hours of homework here (and via google) on changing the sizes of the MC's for either function. (brakes and clutch)

    I swapped to a larger MC for the clutch (very happy I did). Makes the clutch engage much closer to the floor with my setup (T56 and Forte's slave cyl.)

    and I have 2 smaller MC's for the brakes too that I have not yet swapped out. Goal there is to get a more "progressive" feel to the pedal. There's some good discussion out there related to making this change along with more aggressive pads (depending on what setup you have).

    Just food for thought - I sure wish I had set things up this way BEFORE the car was finished. Changing the MC's a pain in the *** at this point. (Which might be why I haven't done it yet!)

    Rian

  7. #7
    Junior Member
    Join Date
    Oct 2024
    Posts
    5
    Post Thanks / Like
    appreciate the input

  8. #8
    Junior Member
    Join Date
    Sep 2018
    Posts
    14
    Post Thanks / Like
    Quote Originally Posted by Rian_Colorado View Post

    Just food for thought - I sure wish I had set things up this way BEFORE the car was finished. Changing the MC's a pain in the *** at this point. (Which might be why I haven't done it yet!)

    Rian
    Along those lines you might want to look into the threads on changing out the wilwood MCs before the body's. I had 3 Wilwood MCs leak before 250 miles and am glad I didnt have the footbox panels and body on before I changed. Wilwood said it was lateral load that caused the leak and sent me a rebuild kit for the first leak. After the next 2 leaks I changed to Tilton MCs.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Stewart Transport

Visit our community sponsor