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Drum To Disc Question

Discussion in 'Early CJ5 and CJ6 Tech' started by cj6/442, Dec 10, 2017.

  1. 47v6

    47v6 junk wrecker! 2023 Sponsor 2022 Sponsor

    I have a wrangler master/vacuum booster and swinging pedals. I use mid 80s blazer calipers and 77 jeep rotors all the way around. Full float rear differential makes the disk conversion back there the same as the front D30. I use NO RPV or proportioning valve. I can lock up all 4 35" tires at will or panic stop at any speed in full total control at any speed my jeep will go.

    This braking system combined with Power steering makes my jeep drive as safe and easy as a late cj5/7 or wrangler.
     
  2. cj6/442

    cj6/442 Sponsor

    I had 11 " ford drums in front and jeep 11s in the back .and I could always stop the jeep on crazy rock lines .like almost verticaland drums worked good actually . I think disc would be better on the street. my suspension is really soft and things happen

    hopeing to do the other side this weekend and get the proper AN Fittings.....
     
    Last edited by a moderator: Dec 15, 2017
  3. cj6/442

    cj6/442 Sponsor

    59 cj5 jeep cut in half to make a 6
    buick motor to ford trans to scout t case
    cj7 springs.
    front is jeep d30 with big bearing 30 spline carrier ,ford hubs ,chevy brakes .
    chevy column,ford shock towers.olds ps box ford ps pump , ford fuel transfer switch ...
     
    fhoehle and 47v6 like this.
  4. fhoehle

    fhoehle Sponsor

    My friend blew his Dana 30 out recently so we are going to make a clone of my front 44 using another Scout axle. I will post it when I get to it. Right now I am buried in snowplows and broken 1 tons. Lol
     
    wheelie likes this.
  5. wheelie

    wheelie beeg dummy 2024 Sponsor 2023 Sponsor

    That would be awesome. Not the part about being up to your neck in broken plows and trucks. the build thread part. :DThanks.
     
  6. cj6/442

    cj6/442 Sponsor

    well it rolls and stops .slowly .....needs to stop way better .....tomorrow I will reverse the lines ...if that doesn't work ill switch masters
    20171230_143423.jpg
    20171230_143356.jpg
     

    Attached Files:

  7. cj6/442

    cj6/442 Sponsor

    I reversed my brake lines fronts to the back port and it stops worse .........so moving on to a bigger disc/ drum master
     
  8. tarry99

    tarry99 Member

    Do the math on the Master cylinder.............larger bore equals less pressure at the calipers.............don't forget pedal ratio.........if it's non-powered you need about a 6:1 ratio.
     
  9. cj6/442

    cj6/442 Sponsor

    I ordered a master for a 67 vette with non power disc brakes
     
  10. wheelie

    wheelie beeg dummy 2024 Sponsor 2023 Sponsor

    vette........4 wheel disc?
     
  11. cj6/442

    cj6/442 Sponsor

    a lot of early bronco buddies run that vette master ,,,it's only $25.
     
    Last edited: Jan 1, 2018
  12. Focker

    Focker That's a terrible idea...What time? Staff Member

    You bled them (again)... Right?

    Also, can you post a picture of the current MC you're using from the floor access view?
     
  13. jpflat2a

    jpflat2a what's that noise?

    Keep in mind Steve those front disc pads have zero time on them.
    They will need some miles to wear/seat in to the rotors.
    Drive around riding the brake pedal to heat them up.
     
    Focker likes this.
  14. '74Renegade

    '74Renegade Active Member

    Steve, are your pads organic or semi-metalic? Organic for non-power applications.
     
  15. cj6/442

    cj6/442 Sponsor

    focker no I'm not pulling the floor up . of course I bled them ....
    jim these are pads that came with the calipers they were run on the rear of an EB and have lots of life left .
    mike . they are non race pads .but are wilwood .id have to check which application though ....
     
  16. cj6/442

    cj6/442 Sponsor

    focker the master I'm using now is normal drum jeep .both reservoirs same size
     
    Focker likes this.
  17. Focker

    Focker That's a terrible idea...What time? Staff Member

    That's how mine was before I bought the Ford Disc/Drum MC. I never got a chance to try it with discs since I ruined it. :rolleyes:
     
  18. Focker

    Focker That's a terrible idea...What time? Staff Member

    Sorry... I had to ask. :shrug:
     
  19. cj6/442

    cj6/442 Sponsor

    so the vette master was gigantic and won't come close to fitting ...a EB buddy had a 1 1/16 disc drum master I'm gunna try that next
     
  20. Focker

    Focker That's a terrible idea...What time? Staff Member

    I had to cut some of the frame away to make mine (Ford Bronco) fit. Other than that, it works great.