Brake booster & master cylinder - what are they from?

Discussion in 'The whoa and the sway.' started by Utah455, Sep 21, 2024.

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  1. Utah455

    Utah455 Platinum Level Contributor

    Typo, meant EA. The correct for 70 Stage 1

    Good idea, I'll have to check. Yeah I was thinking of trying the hold off myself. And already was looking at whitepost for the master. Mike did mention he sends them out and prefers stainless. I'll have to take a picture of the master when I get home, not sure if it needs rebuilding or not.
     
    Utah455, Sep 30, 2024
    #21
  2. john.schaefer77

    john.schaefer77 Well-Known Member

    Early 70 Framingham car. Hard to get a pic of the upside Delco but here it is:
    20240930_172614.jpg
     

    Attached Files:

    john.schaefer77, Sep 30, 2024
    #22
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  3. Utah455

    Utah455 Platinum Level Contributor

    Took some pictures of the EA master cylinder I have and guess it probably needs to be sent out just in case. Bought from a reputable source but don’t have any history on it as whether it worked/not worked.
     

    Attached Files:

    Utah455, Oct 1, 2024
    #23
  4. BuickV8Mike

    BuickV8Mike SD Buick Fan

    . 20240930_181512.jpg 20240930_181512.jpg 20240930_181428.jpg
     
    BuickV8Mike, Oct 1, 2024
    #24
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  5. BuickV8Mike

    BuickV8Mike SD Buick Fan

    003 and...
     
    BuickV8Mike, Oct 1, 2024
    #25
  6. Brett Slater

    Brett Slater Super Moderator Staff Member

    Well, I did and still wouldn't hesitate to use or recommend them.

    I sent my original CT master cylinder late in 2022. Got it back within a week but it wasn't car season yet, so it went on the shelf.

    A couple months later, I installed it - and was excited to have a refurbished, original component back in the engine bay.

    However, it wouldn't bleed - or something was messed up, I forget exactly what. Nonetheless, after 2 hours of messing with it, I put the aftermarket one back one and the original back in the box White Post shipped it to me in.

    That evening, I sent them an email explaining what was happening. The next morning, they replied with a FedEx shipping label. 5 days later, I had it back and installed that same weekend. It's been fine since.

    Customer service goes a long way with me and theirs is top notch.
     
    Brett Slater, Oct 2, 2024
    #26
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  7. bignastyGS

    bignastyGS Maggot pilot

    After reading through this thread,the master cylinder and booster from my GSX has 97 stamped on the tab and Delco upside down too. That should be April 7 1970?? I don't know how to decipher the master cylinder though. 20241003_181052.jpg 20241003_181212.jpg
     
    bignastyGS, Oct 3, 2024
    #27
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  8. Utah455

    Utah455 Platinum Level Contributor

    @bignastyGS what number do you have on the other side of the tab on the booster? Opposite of 97?

    there is a two letter code on that front tab on the master. Top side. Tried to draw blue arrow. I’ll look for the thread with the codes.

    upload_2024-10-3_18-56-53.png
     
    Last edited: Oct 3, 2024
    Utah455, Oct 3, 2024
    #28
  9. bignastyGS

    bignastyGS Maggot pilot

    looks like the back side of the tab hs 1076 on it and the code on the master cylinder is EA
     
    bignastyGS, Oct 3, 2024
    #29
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  10. Utah455

    Utah455 Platinum Level Contributor

    Thanks! Awesome 1076. Just no delco stamp for me. EA is for power disc. and found the picture in the other thread I was looking for.

    upload_2024-10-3_19-24-6.png
     
    Utah455, Oct 3, 2024
    #30
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  11. Redmanf1

    Redmanf1 Gold Level Contributor

    Good info
     
    Redmanf1, Oct 6, 2024
    #31
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