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Drum to Disc system switch - 60's cars

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  • #46
    I have used Stude disc brake brackets on a drum brake spindle, they
    fit just fine, the Stude bracket actually has three separate cast in
    spacers that fit into the counter bores on the drum spindle.

    A harder Stude pad compound will wear your expensive Stude rotor a
    lot faster, so you pay to play. Instead of replacing pads often you
    end up replacing your rotor sooner. Harder pads also require more
    pedal pressure.

    I already covered the wheel weight debate, and ride harshness is due
    to lower profile tire. You cant expect a 45 series tire to absorb a
    pothole like a 75 series ballon tire with half the sidewall thickness.

    For those that missed the weight post : The aftermarket wheels I got
    from AFS (17 x 8) are known to be strong and heavy, but they only
    weighed 50 pounds each with the 245/45R17 tires. The stock 15 inch
    steel Stude wheel weighed 52 pounds with a 78 tire! There are much
    less weight wheels out there than the AFS, I believe that a factory
    Cobra wheel weighs less even (and is an inch wider).

    Rear discs are not really required, though with aftermarket wheels you
    might not want that ugly rusted drum showing through.

    Wheel clearance with my setups is easy to check, since its relationship
    is factory Ford, so if you want to see if your wheel will clear, just
    try them on a Mustang with the brakes you want.

    Tom
    '63 Avanti R1, '03 Mustang Cobra 13" front disc/98 GT rear brakes, 03 Cobra 17" wheels, GM alt, 97 Z28 leather seats, TKO 5-spd, Ported heads w/SST full flow valves.
    Check out my disc brake adapters to install 1994-2004 Mustang disc brakes on your Studebaker!!
    http://forum.studebakerdriversclub.c...bracket-update
    I have also written many TECH how to articles, do a search for my Forum name to find them

    Comment


    • #47
      Hi, Tom,

      Thanks for the weight comparison. I should have clarified the heavier wheels to which I was referring were the commonly used 6" steel Ford and MoPar upgrades.

      I no longer have any Studebaker wheels but do have the Ford 6". Does anyone have a 4.5" and a 5" Studebaker wheel to weigh for us? This would be a good thing to have for future searches when one is considering a wheel swap.

      thnx, jack vines

      PackardV8
      PackardV8

      Comment


      • #48
        Even with magnesium wheels there is not a great weight savings
        rim, 17 x 8.5, 17.5#; tire, 235/50/17, 27#; 44.5#/front wheel & tire
        rim, 18 x 9.5, 19.5#; tire, 255/45/18, 30#; 49.5#/rear wheel & tire

        rotor weight: 19# for 13" diameter (12.795), 1.260 thick, vented

        Just out of curiosity, checked what the bores were on the dual piston calipers: 1-9/16" dia x 2 pistons per caliper = 3.835 sq inches --- Front Pistons

        What is the Studebaker Avanti rotor weight?

        Does a 15" Avanti steel rim and 6.75 x 15 tire weigh nearly 50# as discussed?

        Bore size on the Studebaker Avanti caliper?

        sigpic 1963 Studebaker Avanti: LS1 motor and T-56 transmission have been moved rearward, set up as a two seat coupe with independent rear suspension. Complex solutions for nonexistant problems.

        Comment


        • #49
          quote:Originally posted by PackardV8
          Does anyone have a 4.5" and a 5" Studebaker wheel to weigh for us?
          quote:Originally posted by grobb284

          What is the Studebaker Avanti rotor weight?
          Does a 15" Avanti steel rim and 6.75 x 15 tire weigh nearly 50# as discussed?
          I am willing to bet that the stock Stude rotor is considerably lighter
          than the 13" Cobra rotor, I can check when I get home tonight, I can
          also weigh the stock caliper. I dont understand the question on the
          stock Stude wheel, I posted the weight above : 52 pounds.

          Tom

          quote:Originally posted by sbca96

          The stock 15 inch steel Stude wheel weighed 52 pounds with a 78 tire!
          '63 Avanti R1, '03 Mustang Cobra 13" front disc/98 GT rear brakes, 03 Cobra 17" wheels, GM alt, 97 Z28 leather seats, TKO 5-spd, Ported heads w/SST full flow valves.
          Check out my disc brake adapters to install 1994-2004 Mustang disc brakes on your Studebaker!!
          http://forum.studebakerdriversclub.c...bracket-update
          I have also written many TECH how to articles, do a search for my Forum name to find them

          Comment


          • #50
            quote:Originally posted by PackardV8
            Does anyone have a 4.5" and a 5" Studebaker wheel to weigh for us?
            quote:Originally posted by grobb284

            What is the Studebaker Avanti rotor weight?
            Does a 15" Avanti steel rim and 6.75 x 15 tire weigh nearly 50# as discussed?
            I am willing to bet that the stock Stude rotor is considerably lighter
            than the 13" Cobra rotor, I can check when I get home tonight, I can
            also weigh the stock caliper. I dont understand the question on the
            stock Stude wheel, I posted the weight above : 52 pounds.

            Tom

            quote:Originally posted by sbca96

            The stock 15 inch steel Stude wheel weighed 52 pounds with a 78 tire!
            '63 Avanti R1, '03 Mustang Cobra 13" front disc/98 GT rear brakes, 03 Cobra 17" wheels, GM alt, 97 Z28 leather seats, TKO 5-spd, Ported heads w/SST full flow valves.
            Check out my disc brake adapters to install 1994-2004 Mustang disc brakes on your Studebaker!!
            http://forum.studebakerdriversclub.c...bracket-update
            I have also written many TECH how to articles, do a search for my Forum name to find them

            Comment


            • #51
              quote:I dont understand the question on the
              stock Stude wheel, I posted the weight above : 52 pounds.
              I'm sorry Tom, missed that.

              By the way those dimensions and weights are from my car, not second guessing your (Tom's) weights and dimensions.

              Best regards,
              Gene

              sigpic 1963 Studebaker Avanti: LS1 motor and T-56 transmission have been moved rearward, set up as a two seat coupe with independent rear suspension. Complex solutions for nonexistant problems.

              Comment


              • #52
                The original Avanti brakes were "balanced" front to rear via using the truck type anchored shoes on the rear wheels instead of the self-actuating floating type car shoes. (along with smaller bore wheel cylinders on the rears). If you just put on front disks without chanjing out the rear backing plates and shoes, you'll end up needing a proportioning valve to Re-balance the braking force between front and rear.
                Go with a Turner kit. You'll save yourself a lot of headaches. I installed one 11 years ago and haven't touched the brakes in about 90,000 miles since.

                Comment

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