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Thread: RA28 Boltup Brake upgrade ( Crown- corona - ??) WIP

  1. #46
    Built not Bought Grease Monkey Rosie's Avatar
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    Default Re: RA28 Boltup Brake upgrade ( Crown- corona - ??) WIP

    Thats the calliper that i used, although u will have to use dba017 with the xt130 strut.

    If u use any other rotor u will only have 70% pad contact or less.

    U will also have to remove one of the two spacers in the centre of the calliper and shave off about 0.2 mm out of the mounting holes on the callipers for the bolts to go through.

    Cheers Rosie.
    1977 RA28 1GGTE - never ending project
    Cough 'yaris' Cough - don't ask.

  2. #47
    Toymods Club Member Backyard Mechanic auto351's Avatar
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    Default Re: RA28 Boltup Brake upgrade ( Crown- corona - ??) WIP

    Thanks people,
    Just looking at the Wilwood sizes there is a unit that will fit.
    I only have two questions
    1) are these street legal (the question of duct caps was raised before)?
    2) these look only to come with a 4 @ 28.4mm pistons, doing some quick sums the Hilux caliper can put 2.3 time the clamping force, have you noticed a difference in braking the these calipers.

  3. #48
    Forking Architect Grease Monkey
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    Default Re: RA28 Boltup Brake upgrade ( Crown- corona - ??) WIP

    ...ABS still stock Peugot rotors for anyone still looking...and source them from brembo...i ordered mine ina couple of months ago, wasnt a problem...cost me 140ish for both

    ...sorry, back on topic

  4. #49
    Built not Bought Grease Monkey Rosie's Avatar
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    Question Re: RA28 Boltup Brake upgrade ( Crown- corona - ??) WIP

    Quote Originally Posted by auto351
    Thanks people,
    Just looking at the Wilwood sizes there is a unit that will fit.
    I only have two questions
    1) are these street legal (the question of duct caps was raised before)?
    2) these look only to come with a 4 @ 28.4mm pistons, doing some quick sums the Hilux caliper can put 2.3 time the clamping force, have you noticed a difference in braking the these calipers.
    My engineer had no problems with them, and when i wanna stop, they have plenty of ''clamping force'' for a 1000kg car and 150 odd kw's (no i do not want to get into that debate).

    That is with the standard master cylinder, pedal feels good and application is smooth, suppose with upgraded master cyl u could do front wheel stands
    1977 RA28 1GGTE - never ending project
    Cough 'yaris' Cough - don't ask.

  5. #50
    Junior Member Grease Monkey ta22 3tgte's Avatar
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    Default Re: RA28 Boltup Brake upgrade ( Crown- corona - ??) WIP

    Hey Rosie,
    Just a quick one, what is the minimum size wheel you can fit over the DBA 017's with the Wilwood 6 pot calipers?

    Cheers Brendan

  6. #51
    Built not Bought Grease Monkey Rosie's Avatar
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    Default Re: RA28 Boltup Brake upgrade ( Crown- corona - ??) WIP

    Certain 14's ( depending on internal design) will fit - but only just and 15's not a drama.

    Wilwood 4 pot, not 6.
    1977 RA28 1GGTE - never ending project
    Cough 'yaris' Cough - don't ask.

  7. #52
    C'mon, Touch My Grease Monkey SLO-030's Avatar
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    Default Re: RA28 Boltup Brake upgrade ( Crown- corona - ??) WIP

    DBA 015's on the way, still hunting for calipers
    Member Of The Leaf Sprung Axle Trampers Club

  8. #53
    Junior Member Automotive Encyclopaedia Spectre's Avatar
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    Default Re: RA28 Boltup Brake upgrade ( Crown- corona - ??) WIP

    Bringing this topic back up as it has some good info
    Quote Originally Posted by CLG
    It's a good system in theory, but it's fucked.

  9. #54
    Junior Member Automotive Encyclopaedia Spectre's Avatar
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    Default Re: RA28 Boltup Brake upgrade ( Crown- corona - ??) WIP

    Just adding to this. But what is the Center Bore Hole diameter for the JZS133 rotor?
    Quote Originally Posted by CLG
    It's a good system in theory, but it's fucked.

  10. #55
    Toymods Club Member Backyard Mechanic auto351's Avatar
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    Default Re: RA28 Boltup Brake upgrade ( Crown- corona - ??) WIP

    Full rotor specs

  11. #56
    Junior Member Automotive Encyclopaedia Spectre's Avatar
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    Default Re: RA28 Boltup Brake upgrade ( Crown- corona - ??) WIP

    Where can I get a copy of that catalogue?

    Can these rotors only be ordered from Toyota? As I can't seem to find a DBA number for them?

    Also, is this a slip over hub, or bolt to back of hub style rotor? Part of me thinks bolt to back, with the 5x100 PCD for bolting to the hub, the other says its slip on, as it has a 5x114.3 PCD?

    That looks like a pretty good rotor though, ticks most of the boxes, decent sized (300 would have been better ), 76mm center bore, similar original height compared to the RT132/MS65 disks, is vented...

    *edit* appears to be bolt to back of hub, just realised "C=Mounting Face"
    Quote Originally Posted by CLG
    It's a good system in theory, but it's fucked.

  12. #57
    Junior Member Automotive Encyclopaedia Spectre's Avatar
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    Default Re: RA28 Boltup Brake upgrade ( Crown- corona - ??) WIP

    Ok bad news is that the JZS133 disk rotor is not available via DBA, or Toyota Australia...

    Due to the fact the JSZ133 is a full import... I'm going to try and see if it's possible to have some sent from Brembo in Japan, as they must be available there...
    Quote Originally Posted by CLG
    It's a good system in theory, but it's fucked.

  13. #58
    Junior Member Automotive Encyclopaedia Spectre's Avatar
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    Default Re: RA28 Boltup Brake upgrade ( Crown- corona - ??) WIP

    More talking to myself. Found the brembo site with the searchable data base. Looks like that JZS133 rotor is the only one that will bolt straight up to the MS65 hub. Otherwise it will have to be redrilled to 4x100 to mount to the corona / celica hub.

    It is an extra 7mm larger in diameter, and 6mm thicker than the 504 rotor though, and wont require machining if you make up a caliper bracket / adapter.

    Brembo part number 09.7791.10 - It is an international disk rotor though. (Crown JZS133 89-96)
    Quote Originally Posted by CLG
    It's a good system in theory, but it's fucked.

  14. #59
    Toymods Club Member Backyard Mechanic auto351's Avatar
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    Default Re: RA28 Boltup Brake upgrade ( Crown- corona - ??) WIP

    I spoke to the guys at castlehill toyota and these can be ordered from them, other toyota dealer wont order, but castlehill toyota can get grey import parts
    Price was $163.oo each listed in post #22 there was a lead-time of 4 week from memory.

    I cant see these being no longer avalibe as there would be 1000's of cars still in circulation but if these are no longer avalible that will suck for all thoses crown drivers,


    These hubs bolt to the back, but still trying to find a S13W small caliper to check spacing,

    Manuel

    EDIT:
    Sorry have been busy to call toyota will do my best to check by friday.
    EDIT:
    Yes still avalible but the guys at Castle Hill Toyota are calling me back with the price.
    Last edited by auto351; 27-05-2009 at 07:00 PM.

  15. #60
    Toymods Club Member Backyard Mechanic auto351's Avatar
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    Default Re: RA28 Boltup Brake upgrade ( Crown- corona - ??) WIP

    Just spoke to Castle Hill Toyota again and yes you can still order these, the bad news two price increasses in the past 3 months, current price $250.00 each rotor.

    Toyota said even if the $AU Dollar gets better the price will remain at $250.00 each


    I dont know about other but that price may be to high for my liking and may just look for another option on disc rotor and even using one of the existing methods for brake upgrade.

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