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updated front disc brakes 120-130

posted by  rayjanj on  Thu Aug 16 15:33 CST 2012
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last visit: Fri Oct 17 07:24 CST 2014
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Hello all,

I have been working on disc brakes for my PV544 because of lack of 122 rotors and calipers. I made up the adapter using a 122 spindle. I will make up a mount for my PV544 later.
I found a good combo of parts that uses a rotor from a 2004 vehicle and a 1993 vehicle. Had to have the center hole opened out to fit the 122 hub. The lug spacing was the same as the 122 but the lug holes had to be drilled to the 122 lug size. I have a mount made which I will take to the machine shop tomorrow to have a pro made mount machined up.

If intrested check out http://s1153.photobucket.com/albums/p513/rayj5/

You are welcome to email me.

Ray J.








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    updated front disc brakes 120-130

    posted by  rayjanj on  Tue Nov 13 15:55 CST 2012
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    last visit: Fri Oct 17 07:24 CST 2014
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    Finally getting back to my disc brake project. I have the mounts made up out of 1 inch thick aluminum. Mounting holes are drilled to mount them to the spindle and the spindle holes are cut out. Just need to have the relief cut to each mount for grease seal clearance and the Volvo 240 caliper mounting holes drilled and tapped. The Range rover rotors are mated to the 122 hubs and fit great.
    I will post pictures to my photobucket album when done.

    Ray J.

    1961 Volvo 544
    1990 Ranger rear end
    1987 Chevy S10 4 cylinder
    1988 Toyota Supra 5 speed
    Volvo 240 calipers and Range Rover rotors.








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    updated front disc brakes 120-130

    posted by  ooooo on  Sat Aug 25 10:57 CST 2012
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    last visit: Sat Mar 15 23:32 CST 2014
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    http://s263.photobucket.com/albums/ii158/motov8id/?action=view¤t=IMG_0177.jpg I don't know how to post pics so a link. this is a Volvo 140 shock installed in an MGB. The stand for the upper shock was fabricated and a hole was drilled in the upper cross member at the center of the spring. Maybe food for thought.








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      updated front disc brakes 120-130

      posted by  rayjanj on  Mon Aug 27 10:59 CST 2012
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      last visit: Fri Oct 17 07:24 CST 2014
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      I put the shock inside the spring but the shock is longer than the spring on a PV544.
      It may not work placing the caliper to the front. Could interfere with the sway bar mount or linkage.
      If it does interfere, I will mount up the 240 caliper in the rear and modify the lower shock bolt and move the shock to the front.

      Nice looking LBC's.

      Ray J.








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        updated front disc brakes 120-130

        posted by  ooooo on  Tue Aug 28 00:35 CST 2012
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        last visit: Sat Mar 15 23:32 CST 2014
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        the picture i linked to was a shock that was too long so I drilled a hole and built a stand to secure the top of the shock( the upper control arm is the shock on an MGB). But good luck you have done most of the work already








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    updated front disc brakes 120-130

    posted by  ooooo on  Wed Aug 22 21:24 CST 2012
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    last visit: Sat Mar 15 23:32 CST 2014
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    run the shock through the center of the spring like on a 122 or 142








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      updated front disc brakes 120-130

      posted by  rayjanj on  Sat Aug 25 09:43 CST 2012
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      last visit: Fri Oct 17 07:24 CST 2014
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      Hello,

      I wish it would fit inside. Since the conversion uses 122 caliper mounts, calipers and rotors, moving the shock from the rear of the king pin to the front of the king pin has been the way everyone has done it. It gives clearance for the rear mounted caliper. The lower shock mount bolt has to be cut and placed at an angle then welded back together.
      One post said he did not move the shock and mounted the caliper at the front and it did not interfere with anything.
      I will try it in the front when the mounts are made up.

      Best

      Ray j.








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    updated front disc brakes 120-130

    posted by  DBS on  Thu Aug 16 21:09 CST 2012
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    last visit: Fri Oct 17 19:33 CST 2014
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    Looks like a lot of serious modifications, including fabricated valve cover! Impressive. Would love to see how it looks when all is finished.

    -DS








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      updated front disc brakes 120-130

      posted by  rayjanj on  Fri Aug 17 06:51 CST 2012
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      last visit: Fri Oct 17 07:24 CST 2014
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      Hello,

      It is a 1987 Chevy 2.5L mated to a Toyota W58 Supra Transmission. Smaller than the Chevy T5 so not too much tunnel trimming required.

      Got some flack about this engine so I had an aluminum box fabed up and put a Volvo valve cover on it. Think that will quell the negative comments ?

      I have tons of pictures and have written down everything done to it so far.
      I hope to get it back from the body shop next month.

      Best

      Ray J.
      Green Forest, Arkansas








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        updated front disc brakes 120-130

        posted by  ooooo on  Sat Aug 18 13:20 CST 2012
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        last visit: Sat Mar 15 23:32 CST 2014
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        how will you secure the rotors to the hub? Will you weld the studs like on the 122? Not the best solution in my opinion. Will the new set up fit inside the stock 15" wheels? Are the rotor and caliper from the same model car? All looks very nice so far.








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          updated front disc brakes 120-130

          posted by  rayjanj on  Sun Aug 19 09:34 CST 2012
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          last visit: Fri Oct 17 07:24 CST 2014
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          Hello,

          As you know to replace the stock 122 rotors you just knock or press the studs out, put on new rotors and press the studs back in. The studs are larger than the rotor and hub stud holes so you get that tight fit. If four 3/8" bolts hold on the stock caliper mount, five 12mm studs will surely hold on the rotor.
          My 1961 Morris Minor has a disc brake conversion and it uses four 3/8" bolts that attach the rotor to the hub and it weighs about 1900 lbs. No problems so far.

          The setup fits inside my PV544 rims.
          The rotors are from a particular Land Rover model and the calipers are from a 1993 Volvo 240 ABS model.

          Best

          Ray J.








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            Caliper Orientation? 120-130

            uid 18083's pic
            posted by  lucid on  Sun Aug 19 10:41 CST 2012
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            last visit: Fri Oct 24 12:31 CST 2014
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            Nice work Ray, but this shot looks to me like the caliper belongs on the opposite side and inverted, so the bleeder screw will be at the top rather than the bottom.

            And while probably not a problem now, the pad locating pins could be reversed too. Putting the heads on the inside makes the pins easier to drive out with a punch if rust-bound.

            Thanks for letting us watch your progress.





            --
            Bruce Young, '93 940-NA (current), 240s (one V8), 140s, 122s, since '63.








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              Caliper Orientation? 120-130

              posted by  rayjanj on  Mon Aug 20 06:42 CST 2012
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              last visit: Fri Oct 17 07:24 CST 2014
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              Good catch. I was using the first caliper out of the box. On my PV544 I am going to see if it will mount to the front. Everyone mounts it to the rear and moves the shock to the front to eliminate interference.

              Best

              Ray J.








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                Caliper Orientation? 120-130

                posted by  mjamgb on  Fri Aug 24 09:07 CST 2012
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                last visit: Tue Sep 4 14:53 CST 2012
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                Don't put the caliper on the front... it makes for "interesting" braking dynamics.

                Think about how the lever action works. The calipers are universally put on the back for a reason.
                --
                Mike!








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                  Caliper Orientation? 120-130

                  posted by  rayjanj on  Sat Aug 25 09:34 CST 2012
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                  last visit: Fri Oct 17 07:24 CST 2014
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                  Hello,

                  I don't see where it makes any difference. The caliper bracket keeps the caliper from moving in a CCW direction so what would be the difference where the stopping force is applied ?

                  On my 1961 Morris Minor the calipers are at the front when converting to disc brakes. They have been that way since the first guy made adapters in the 1960's to adapt Midget brakes.

                  Best

                  Ray J.








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                    Caliper Orientation? 120-130

                    posted by  mjamgb on  Sat Aug 25 10:25 CST 2012
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                    last visit: Tue Sep 4 14:53 CST 2012
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                    Suit yourself.

                    Can't comment on any aftermarket Morris Minor conversion but I have never observed calipers on the front of any axle center line for front axle... Back axle seems to vary, I'll grant.

                    I admit I have not personally looked at every car on the planet, but still...
                    --
                    Mike!








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                      Caliper Orientation? 120-130

                      uid 32173's pic
                      posted by  Gary L on  Mon Oct 1 09:55 CST 2012
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                      last visit: Wed Oct 22 10:26 CST 2014
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                      I think you'll find that most calipers end up at the rear of the front rotors simply for packaging reasons; namely, avoiding interference with steering mechanism(s)... which are usually in front of the rotor. There are exceptions to this of course.
                      --

                      Gary L - 142E ITB race car, 73 1800ES
                      BlueBrick Racing Website
                      YouTube Racing Videos








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                        Caliper Orientation? 120-130

                        posted by  rayjanj on  Tue Oct 2 06:52 CST 2012
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                        last visit: Fri Oct 17 07:24 CST 2014
                        [RELATED]

                        You are correct. On my 1961 Morris Minor they mount to the front to avoid interference with the steering.
                        Almost all race cars have them in the rear to keep air flow to the vented rotors unrestricted.

                        Ray J.








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                      Caliper Orientation? 120-130

                      posted by  rayjanj on  Mon Oct 1 07:02 CST 2012
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                      last visit: Fri Oct 17 07:24 CST 2014
                      [RELATED]

                      No disrespect intended. I like different points of view. Keeps me from reinventing the wheel.
                      I have been reading up on caliper location and the only thing that is said about front verses rear is cooling. Almost all racing cars have the calipers located at the rear. Being a daily driver it should be ok to mount in the front.

                      Stay tuned for more info.

                      Ray J.







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