Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

Rear Disk break question

Discussion in 'The Garage' started by AnthonyG, May 14, 2003.

  1. AnthonyG

    AnthonyG 1/2 ton status

    Joined:
    Jan 26, 2003
    Posts:
    339
    Likes Received:
    0
    Location:
    Gillette Wyoming
    I know there was a post asking this same question A while back bus i couldn't find it in the search.
    I just got my disk breaks on the rear tonight and bled them all realy good. Now when i drive it, The pedel goes realy far down and the breaks realy suck. My question is Do i just have to gut the porprotioning valve to make the rears work better or what. I was under the impression that the reason for gutting the valve was because the rears were locking up but I don't even have enough stopping power in the back to stop the wheels with the back end off the ground. I know that this has been ansered a million times but if you could anser it one more time or gimmy a link to the answer I would be happy
     
  2. white-rhyno

    white-rhyno 1/2 ton status

    Joined:
    Jan 27, 2002
    Posts:
    942
    Likes Received:
    0
    Location:
    Ellensburg Washington
    Your asking the very same question i did about a month ago. I had the same problem. I used a master cyclinder off a 78 vette with four wheel disc. Hugh differnce. Bolted on with no adapters for lines. Did however cost 80 bucks for a new one. I think you can get a rebuilt for like 30. Try that then get them powerbled. Im much more impressed now. If you have any more questions PM me.
     
  3. dyeager535

    dyeager535 1 ton status Premium Member

    Joined:
    Dec 13, 2000
    Posts:
    26,979
    Likes Received:
    189
    Location:
    Roy WA
    How did the '78 one bolt up with no mods? The 4 wheel disc 'vette masters I've seen (like '68) use the same size fitting front and rear, all disk/drum masters I've seen (truck or car) all use smaller rear fittings/lines, since the drilled orifice in the master cylinder for front/rear brakes are different sizes.

    If the '78 vette uses the same size fittings as the trucks, that would be an awesome swap.
     
  4. white-rhyno

    white-rhyno 1/2 ton status

    Joined:
    Jan 27, 2002
    Posts:
    942
    Likes Received:
    0
    Location:
    Ellensburg Washington
    Im almost positive it was a 78. Ill get a PN number from napa for you later today. I have a bad habit of not keeping recipts. Would it matter that im working with a 76 k5?? Maby thats why i didnt need any fittings? Or maby i just got lucky.
     
  5. dyeager535

    dyeager535 1 ton status Premium Member

    Joined:
    Dec 13, 2000
    Posts:
    26,979
    Likes Received:
    189
    Location:
    Roy WA
    I checked on my dads '74, same deal.

    It could be that the Corvette master later on had different sizes lines like the trucks, I was looking at one 10 years older.

    Took a cursory glance at all the GM cars in the 'yard I looked at, all the master cylinders for disk/drum cars had different size fittings.
     
  6. white-rhyno

    white-rhyno 1/2 ton status

    Joined:
    Jan 27, 2002
    Posts:
    942
    Likes Received:
    0
    Location:
    Ellensburg Washington
    Napa PN# for the MC #39052. Hope that helps
     

Share This Page