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    How-to; DIY 2 pot brakeupgrade

    Old Busted!


    New Hotness!



    This ONLY applies 4 stud BG or BA models, GTR/GTX BG unknown, BA V6 will need some playing with different rotor sizes





    So far i have found two options for this upgrade
    one requires cutting of stuff
    the other is bolt on

    first the parts for option 1 ( No cutting of stuff)

    BA V6 hubs complete
    BG 4 cly 4 stud wheel bearings and 4 stud centers x 2
    Rotors; Your choice of either Slotted/drilled BG GTX/ Astina GT rotors or NB8 MX5/Miata rotors (270mm), * Pads overlap 1mm when using stock 257mm rotors
    Calipers; BJ series wagon Subaru Legacy GT turbo (2pot)
    Brake brackets; Mazda GD 626/TX5/Probe
    Washers of 2-3mm , Cyl head bolt washers work well (i'll explain later)
    Brake pads; as above, but use some Bendix DB1114 or something better than OEM
    Brake lines; your choice of either OEM/Braided etc for BG models * Careful, there are two types ive found, a large and a small Neck Banjo head, i tested using the a split small neck type, all ok, but my car was fitted with a large neck banjo bolt. Large neck requires filling down part of the caliper, 5 mins extra

    First Push out the V6 5 stud Center, push in the 4 stud center
    Paint/bling up the calipers from the Subi/Mazda combo

    Take note of the numbers on the caliper " AD602T " this may have changed during the Subi models, but you need the one with 1 bolt , not 2



    the orange brings out the color in my eyes , best of all NO cutting , just bolt it to the V6 hubs, put 2-3mm thick washers between HUb and caliper to be on the safe side, ie DONT TEST FIT using 21mm Rotors when you have 22mm, kinda confuses you when you see 4mm clear on side yet only 1.5 on the other

    removal of old setup from ya car,

    Fit new rotors, , put the good heat/copper grease on moving parts and bolt together with new pads
    check steering arm lengths are ok, bleed them brakes, run/ bed pads in ,, DONE


    Option two (cutting, swearing, beer/bourbons, & time) <-- i No longer recommend this unless you enjoy trial and error.. **** IT

    Parts for Option 2

    BA V6 hubs complete
    BG 4 cly 4 stud wheel bearings and 4 stud centers x 2
    Rotors; Your choice of either Slotted/drilled BG GTX/ Astina GT rotors or NB8 MX5/Miata rotors (270mm)
    Calipers; T series Mazda Millenia/Xedos 9 S/C or 2.5 V6 (2pot)
    Brake brackets; As above
    Brake pads; as above, but use some Bendix DB1326 or something better than OEM
    Brake lines; your choice of either OEM or Braided etc for BG models *work fine with either small or big neck banjo heads

    Take note of the caliper cast numbers "AD43T" and 2 bolt arrangement






    You need to cut back this much off the caliper bracket, tiny amounts off the hubs, casting line was in my way on 1 hub, other was ok

    * The bracket side facing the Wheels needs to be "trimmed" if it hits your wheels...my 14" OEM mazda mags clear it..yet my Enkai stuff hits the bracket, needs a good 2-3mm trimmed off it ...<--reason i gave up for the night




    The bolt holes in the V6 hub needs to be drilled out 2mm to fit the millenia bolts, 14mm i think? i didnt do that bit



    the dust sheild? also needs a tiny amount chopped off, 2mm as it hits the corner of the bracket

    Strangely but there is NO overlap on the Millenia pad when using stock Astina GT rotors???


    Passes the 14" wheel test, i started to laugh when this fitted


    drop new pads in
    Fit new rotors, and bolt together

    removal of old setup from ya car, Bolt in the above setup, check steering arm lengths are ok, bleed them brakes, run/ bed pads in ,, DONE[/b]
    Last edited by dave0r; 12-28-2007, 02:59 AM.


    1996 ST205 Toyota Celica GT4 | 1991 BG 323 Astina GT, BP N/A 138WHP *Gone*.
    1990 BG Ford Laser S (jdm), soon to be 220whp KL-ZE track hack

    #2
    thats awesome! thanks!!
    Escort GTR -- 11.87 @ 117.6 mph -- 320 HP / 325 Ft. Lbs. @ 23 PSI
    ... The first FWD BG with a Toyota E153 transmission conversion in the USA!
    Looking for BP x Toyota E153 adapter plates? PM me or contact me on Facebook: Riel Performance Parts

    Comment


      #3
      Thanks for sharing this great info.

      Now its a sticky
      1993 Protege LX-Midnight's shadow SOLD
      1996 Honda CBR600-Wrecked. Damn Honda crippled me
      2002 mazda MPV-family truckster SOLD
      2010 VW routon

      Originally posted by jay
      .....they totally underestimated the number of gearheads such as myself that have families but refuse to grow the hell up and stop playing with cars, or that otherwise see the utility of having 4 doors. Obviously I ain't alone, as there are a helluva lotta sti and evo here. Bueler? Beuler? Mazda? Mazda?

      Comment


        #4
        We dont have the BA V6 spindles

        Whats the difference between those and your astina gts? (BG with rear wheel disk)

        JACK.
        -Jack

        ONTARIO MAZDA CLUB! Join! https://www.facebook.com/groups/500055016671733/

        91 626 LX - basically stock and pretty slow still
        http://www.clubprotege.com/forum/sho...my-GD-626-LX-)

        01 E53 3.0i - FOR SALE! pm if interested

        91 USDM Protege LX - SOLD! turbo/manifold up for sale!
        http://www.clubprotege.com/forum/showthread.php?t=46606

        Comment


          #5
          Spindles on the Astina GT are the same as anyother BG with 4 dics, The BA V6 has larger hub arms so you can bolt this together

          If i may, next time you US blokes are at the j/y see if the hubs from 626/telstar/"something thats KL/K8" and see if they bolt to a BG setup


          1996 ST205 Toyota Celica GT4 | 1991 BG 323 Astina GT, BP N/A 138WHP *Gone*.
          1990 BG Ford Laser S (jdm), soon to be 220whp KL-ZE track hack

          Comment


            #6
            I like the increase in pad material alot!!!


            one should calculate the increase or decrease in pad force by measuring the piston diameters & running the calc. its been noted with mx6 guys that dual piston actually reduces brake pad force by 1-4% while however minimal I wouldn't consider it an upgrade.

            IDK if you could get the part number for the rear astina hubs for me & PM it my way, i'll be upgrading to 5 lug fronts next year should be in this format for the part number b455-18-710a or something similar
            ---Has ClubProtege helped you in someway? show your support by Contributing--- Click Here---

            1992- project FE3..... 313 WHP @ 9.3psi




            I pet my dash when I get into the car..."good car"
            he actually has a mazda tree, parts grow on it

            Comment


              #7
              Yeah the brake force should be good, more even,...even with out the larger booster and prop valves (i'll try the BG setup first, then switch to the larger booster,prop setup)


              1996 ST205 Toyota Celica GT4 | 1991 BG 323 Astina GT, BP N/A 138WHP *Gone*.
              1990 BG Ford Laser S (jdm), soon to be 220whp KL-ZE track hack

              Comment


                #8
                ryan you may be decreasing the pad force slightly, but really all that is going to do is shift the brake bias a little more to the rear. since its already biased rediculously to the front, it should be fine.
                Escort GTR -- 11.87 @ 117.6 mph -- 320 HP / 325 Ft. Lbs. @ 23 PSI
                ... The first FWD BG with a Toyota E153 transmission conversion in the USA!
                Looking for BP x Toyota E153 adapter plates? PM me or contact me on Facebook: Riel Performance Parts

                Comment


                  #9
                  bpt323; i have some rear V6 astina 5 stud hubs if you need them ..might need to part a kidney for shipping, they are heavy


                  1996 ST205 Toyota Celica GT4 | 1991 BG 323 Astina GT, BP N/A 138WHP *Gone*.
                  1990 BG Ford Laser S (jdm), soon to be 220whp KL-ZE track hack

                  Comment


                    #10
                    the hub/bearing assembly that bolts to the rear spindle?
                    Escort GTR -- 11.87 @ 117.6 mph -- 320 HP / 325 Ft. Lbs. @ 23 PSI
                    ... The first FWD BG with a Toyota E153 transmission conversion in the USA!
                    Looking for BP x Toyota E153 adapter plates? PM me or contact me on Facebook: Riel Performance Parts

                    Comment


                      #11
                      yup completed rear 5 stud setup, BG calipers at the back
                      and just the 5 stud bearing/spindle setup for the front same spline count as BG , but i havent checked lengths etc


                      1996 ST205 Toyota Celica GT4 | 1991 BG 323 Astina GT, BP N/A 138WHP *Gone*.
                      1990 BG Ford Laser S (jdm), soon to be 220whp KL-ZE track hack

                      Comment


                        #12
                        updated!


                        1996 ST205 Toyota Celica GT4 | 1991 BG 323 Astina GT, BP N/A 138WHP *Gone*.
                        1990 BG Ford Laser S (jdm), soon to be 220whp KL-ZE track hack

                        Comment


                          #13
                          Ok, this sound very good: But we dont have Astina's, GTR, here in PR

                          I will like to ask some questions

                          -Rotors to Use? can I use my stock Escort Gt

                          -Caliper bracket? just to be correct mazda 626

                          -Spindle mount? 626 but whant to know if the struts have to be change or can I use stock ones

                          -What year of 626?

                          -Are the bolt joint's the same as the Escort Gt

                          -Last one the hub? is the same Escort Gt and 626 in the bearing diameter just have to pull out the 626 hub and put mine

                          Thanks
                          sigpic

                          Comment


                            #14
                            Originally posted by protege94 P.R View Post
                            Ok, this sound very good: But we dont have Astina's, GTR, here in PR

                            I will like to ask some questions

                            -Rotors to Use? can I use my stock Escort Gt
                            Yes stock rotors, recommend upgrading to 270mm NB8 Miata/MX5

                            -Caliper bracket? just to be correct mazda 626
                            Anything from a GD mazda , 626/probe/tx5

                            -Spindle mount? 626 but whant to know if the struts have to be change or can I use stock ones
                            626..NO ...you need BA or CBA V6 ones

                            -What year of 626? Depends on country, i got mine from a 1988

                            -Are the bolt joint's the same as the Escort Gt
                            Im using the ball joint from the BA V6 hubs, appears they have a bigger hole into the hub than the BG, but are the same lenghts

                            -Last one the hub? is the same Escort Gt and 626 in the bearing diameter just have to pull out the 626 hub and put mine No sure on that one..IM using a BG bearing center on one side..and a EC MX3 bearing center on the other, both appear to be the same

                            Thanks


                            1996 ST205 Toyota Celica GT4 | 1991 BG 323 Astina GT, BP N/A 138WHP *Gone*.
                            1990 BG Ford Laser S (jdm), soon to be 220whp KL-ZE track hack

                            Comment


                              #15
                              Thanks for the new info so its time to start looking for parts for my car.
                              sigpic

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