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Post by davefman on Oct 5, 2007 23:13:27 GMT -5
I was reading somewhere online that 85-90 subies can be converted to rear disks. Has anyone ever tried this or knows that it's not possible? just curious cause i'm gonna have to do my rear drums. Disks would be a whole lot easier to replace than drums.
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SeattleJusty
No, a boxer will not fit in a Justy.
Posts: 1,587
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Post by SeattleJusty on Oct 6, 2007 4:25:07 GMT -5
Usually when you read something about "Subarus" or someone mentions "Subarus", they're not talking about the Justy. I wouldn't bother converting drums to discs on a Justy. On a street car, you'll never be able to appreciate the difference. 70% of your braking is done in the front. Justy drum brakes are as simple a drum brake as you will likely see. I recommend keeping your rear brakes stock and getting premium (probably more expensive) pads for your front brakes. If you look really hard you can even find trick cross drilled, slotted, vented rotors for your Justy. I have such rotors for both 12" wheel and 13" wheel brakes.
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89
got Mud? Ice? Snow?
Posts: 398
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Post by 89 on Oct 6, 2007 11:52:07 GMT -5
Hmmmm.... I was eyeballing the rear drum vs. front disc spindles, hubs, and such casually (no measurements) the other day and was pondering the same thing. I could see a significant benefit/improvement for the Rally folks on here if coupled with a hydraulic handbrake kit. But wouldn't that change you over to a less competitive 'modified' class?? The ideas you had come across may very well have been referring to non JUSTY early Soobs or the '95 and up Subaru badged Suzuki Swift/Chevy-Geo Metro/Pontiac Firefly vehicles as GTi versions came 'out of the box' with rear discs. Coincidentally, I had come across the following link - again NOTE - while informative and interesting, this is a NON-JUSTY reference link for idea/brainstorming only... (I would also recommend machinist precision, but idea-wise very interesting...) the guy actually 'made' hubs out of a drums!!:www.teamswift.net/viewtopic.php?t=32739Some other aspects to be considered would be proportioning valve to change front-rear backing ratio and fabrication of caliper mount in rear. Anyone?,
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Post by davefman on Oct 6, 2007 15:18:20 GMT -5
here's the link I came across www.vintagesubaruparts.com/reardiscs.htmI saw it last night and it got me thinking. I'll probably just stick with the stock drums for now. I just need to track down some new shoes. I'll look into the conversion thing mostly out of curiosity and let you all know here at the pro boards if it could work.
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SeattleJusty
No, a boxer will not fit in a Justy.
Posts: 1,587
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Post by SeattleJusty on Oct 7, 2007 2:37:29 GMT -5
here's the link I came across www.vintagesubaruparts.com/reardiscs.htmI saw it last night and it got me thinking. I'll probably just stick with the stock drums for now. I just need to track down some new shoes. I'll look into the conversion thing mostly out of curiosity and let you all know here at the pro boards if it could work. Uh, Homer, it says right on there
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Post by Armageddous on Oct 18, 2007 0:43:27 GMT -5
Hey 89, Here's a thought ... Subaru Loyale's and GL's use their front disc brakes for the Ebrake.. that'd be a huge sets of brakes for a Justy.. However their bolt pattern is 4 on 200mm or something. -Terry
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Post by ianvissers on Oct 30, 2007 3:08:31 GMT -5
I laughed for a good 5 or 10 minutes the first time a saw the subaru front handbrake setup. What were they thinking? "Here's an idea: we'll build a car with 4wd or awd so it'll do great in snow or loose gravel, but just for kicks, we'll make damn sure that anyone who operates the handbrake in these conditions is sure to lose all directional control and wreck the car.", "yeah sure, I mean we do put a snowmobile transmission in one of our cars, how much worse could this be?"
I think an easier way to have 4 wheel disc is to take the front suspension off an '87-'88 Justy, and bolt it onto the rear of the car.
The advantages: -4 wheel disc of course. -'87-'88 have 30mm spindle nuts front and rear '89+ have 30mm nuts rear so there's a good chance the splines match so rear CV shafts may be used. -the front brake rotors on '87-'88 are smaller so you wouldn't have as big rotors on rear as front. -The possibility of 4 wheel steering may be achievable for the first time on a justy.
Some of the problems you may face: -No handbrake option other than your girlfriend running out and placing stones under the tires on hills. -control arms would have to be modified. -The CV axles may not match and they will require alteration or customs will need to be made up.
I personally am going to try this in the next few days as I have an '88 field car and 2 good 1990s. I'll pull the front suspension from the '88 and the rear from my 1990 and try to fit it all together. If it's doable I'll post photos and possibly go through with the swap. It'll be hard to remember to park in gear but I think anyone could get the hang of it after a few roll-aways.
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Post by ianvissers on Oct 30, 2007 3:14:53 GMT -5
just a note on the Swift GTi brakes. Swifts, Metros, Sprints, Fireflys, have a 4x114ish and Justy has 4x100. if anyone just has a smashed up miata in their back yard, it might be worth a try, they're 4x100.
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Post by SUBIEJIM on Oct 30, 2007 9:08:07 GMT -5
ianvissers, You and I are thinking on the same level! I converted my Gen 1 88 4WD Justy over to the bigger 1989 Justy GL brakes. I saw the same things you mentioned. and found the same issues. The biggest issue I found in trying to mount the front knuckle on the rear is the front suspension is a true Mac P strut assembly and the rear is a modified strut setup like the front suspension on a Fox Body Mustang. If our cars used a true Mac P suspension on all 4 corners this could be a very realistic swap. Unfortunately, The only real way to make it happen is with a custom knuckle assembly. You could use all the 88 front brake parts... Rotor, caliper, caliper anchor, dust shield, hub, hub bearings, seals, ETC. All you would really need is an adjustable proportioner valve for brake bias and the "Hopefully to someday be produced..."Custom Knuckle"". The E-brake issue could be worked out with some type of "Pump to set" system where the rear pads are used for E-brake operation. The key is a Custom Knuckle!! Hey Santa... Do you think your workshop could... Jim
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Post by ianvissers on Nov 5, 2007 2:44:29 GMT -5
Glad to hear some real tech terms on these forums now and then. I am really tempted to do this swap. The way I see it though, all the mounting points need to be replaced anyway to accept front end components (strut bar, LCA, Steering arm) so I figure why not rip out the stock strut towers and build new ones. They would need to be cut and angled differently anyway to accept the front struts. This just gives us a chance to give the Justy the camber it deserves.
I'm going for it. Next week of course. Or was that what I said last week? hmmm. Soon I hope.
My 88 is just a field car anyway. Might as well roll it at least once though. On second thought, I've had thicker metal on my baked potato than what the 1st gen roofs are made of. Maybe I can just tip it over by hand and hop in for a photo shoot.
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Post by Armageddous on Nov 10, 2007 21:49:32 GMT -5
Well, speaking from experience.. because I work at an autowreckers.. I see a lot of dead cars with different suspension setups. There are a lot of 4x100 cars out there. Most commonly.. Hondas. Old integra's and 90's CRX's had rear disc brakes. CRX's had independent suspension - but no axles, of course. Maybe an impreza or something could have a close match.. I need to check this out. My car is an 88 4wd, 12" wheels.. stock brakes. I find it take some pedal to stop, which is frightening with my child in the car. I plan on doing the upgrade to the brakes off a second generation, somply because they're a bolt-on, but I wouldn't mind going even bigger then that. Hey Ian, you partin' out that 88? You could make me happy! All my work has is one second gen. Anyways. just bouncing some ideas. Custom might be the way to go, because you could give the car some awesome rear brakes, AND, utilize a much more common rear strut.. -Terry
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