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rear disc brakes on a 94 2 door
Topic Started: Jun 12 2012, 05:13 PM (3,757 Views)
bvillemetro
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[ *  * ]
do they make rear disc for the place of drums
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Eric J
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Formerly CEJ93

You can check this thread out. There is some information on the subject you are asking about. There may be other threads concerning this topic but this is the one I happened to find the quickest.

http://geometroforum.com/topic/3184516/1/#new
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t3ragtop
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Turbo3 and Twincam Tweaker

in a nutshell, to do the swap you need to find donor parts from a suzuki swift gt, 89 thru 94. you'll need the complete rear knuckles, hubs, caliper mounts, calipers, rotors, hand brake cables, rubber brake hoses, and the appropriate proportioning valve located on the firewall in the engine bay. there are a few small parts like the retaining strap that holds the hand brake cable to the rear control arm on the right side to keep the brake cable off the exhaust.

also, be aware that the gt hub has 12mm lugs which means you have to run, at the least, the 13" wheels. the stock 12" wheels won't fit.
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HelterSkelter
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#1 Pizza Driver

you gotta realize also, that around 75% of your braking is done with the front brakes. you might gain like 25% braking power in the rear with discs. that's like a 1/16th increase in overall braking power. unless you are really getting on the brakes, like you are on a track racing or something, i wouldn't even bother, you're not gonna need it with everyday street driving, it's a whole lotta work for nothing.

with all the stuff i have done to my geo and my plans to eventually autocross with it i'm not concerned about rear discs, the car only weighs 1750 lbs :P
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hdsheena
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Still new, but learning...

I was going to post similarly, as I'm looking into the same thing. I'm not doing this for increased braking power (though that's a nice perk), but for ease of working on the car. The drum brakes are just WAY too much of a pain for me to justify keeping them!

"in a nutshell, to do the swap you need to find donor parts from a suzuki swift gt, 89 thru 94."

Provided one had the funds, it should be theorhetically possible to purchase the stock parts new for the swap, instead of finding a donor car.. right?

I'll be sad about not being able to run my 12s anymore, though. :(
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t3ragtop
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Turbo3 and Twincam Tweaker

in a perfect suzuki world, parts that are 20+ years old would still be available new from a dealer. :D

you'd be looking at around $300 a side for the rear knuckles, $200 a side for the hubs, $40 each for 2 rotors, $120 a side for the calipers. then there's $46 per side for the caliper yokes, $96 each for the e-brake cables, and $130 for the proportioning valve.

i had a full set of used gt brakes shipped to me from california about 5 years ago and it set me back around $600 including motor freight charges. then after i bought new hubs with bearings, new slotted rotors, rebuild kits for the rear calipers, brake pads, and an adjusting tool, i had a tick over a grand in the swap.

honestly, the swept area of the drum setup is about the same as the disc brakes and the braking balance is such that the rear brakes provide very little braking effect anyway. if you want to open your wallet for the cool factor, i won't hold you in contempt. :D

just be sure that you don't cut corners and do the job as it should be done.
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944door
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t3ragtop
Jun 22 2012, 04:59 PM
just be sure that you don't cut corners and do the job as it should be done.
it seems as though you have encountered the monkey that had my miata last lol
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clarkdw


How much braking do the rears do on a light FWD car? I had a race Mini, the early ones. I used aluminum drums on the rear with an adjustable bias valve. The front/rear weight percentages were about 60/40, close to a Metro.

I did a number of test sessions to get the rear brakes set up for maximum effectiveness. When the rear brakes were adjusted just short of lock up you could jack up the car, hold the brakes on with all you had and you could still turn the rear wheels with your hands. That is how much braking the rears do at the limit of adhesion. Braking hard going uphill resulted in the car doing a reverse wheelie.

The stickier the tire the less the rear brakes do. On road cars it is around 80+% front brake when braking hard. On race cars with sticky rubber it's much closer to 100% front brake.
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Woodie
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hdsheena
Jun 22 2012, 01:30 PM
I'm not doing this for increased braking power (though that's a nice perk), but for ease of working on the car. The drum brakes are just WAY too much of a pain for me to justify keeping them!
I know! Replacing those shoes every 200K miles is really eating into my free time. The wife and I are going into counseling over it.


clarkdw has wrapped it up pretty nicely. Bone stock is about 80/20. Put some decent tires on there and you're probably at 90/10%.


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Coche Blanco
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Woodie
Jun 23 2012, 06:29 AM
hdsheena
Jun 22 2012, 01:30 PM
I'm not doing this for increased braking power (though that's a nice perk), but for ease of working on the car. The drum brakes are just WAY too much of a pain for me to justify keeping them!
I know! Replacing those shoes every 200K miles is really eating into my free time. The wife and I are going into counseling over it.
:wub:
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clarkdw


Yeah sure you can :wub: when you have a Liz to do your brakes. The rest of us poor saps have to do all the hard slugging ourselves. At least once every 19 yrs or so. :P
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Murf 59
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HelterSkelter
Jun 15 2012, 01:37 AM
you gotta realize also, that around 75% of your braking is done with the front brakes. you might gain like 25% braking power in the rear with discs. that's like a 1/16th increase in overall braking power. unless you are really getting on the brakes, like you are on a track racing or something, i wouldn't even bother, you're not gonna need it with everyday street driving, it's a whole lotta work for nothing.

with all the stuff i have done to my geo and my plans to eventually autocross with it i'm not concerned about rear discs, the car only weighs 1750 lbs :P
:rocker He does not have front brakes on this car. And if I remember rightly. He is also running 15" wheels with Bonneville Salt Flats tires. He ran a little over 135mph last year. :thumb
I just reread this thread. My mistake. Our other friend lives in SLC. The names are so similar that I thought it was Clay. His is the car with no front brakes. Sorry about that.
Edited by Murf 59, Jun 29 2012, 07:17 AM.
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climbinghalfdome
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MPG OCD

hdsheena
Jun 22 2012, 01:30 PM
"in a nutshell, to do the swap you need to find donor parts from a suzuki swift gt, 89 thru 94."

Provided one had the funds, it should be theorhetically possible to purchase the stock parts new for the swap, instead of finding a donor car.. right?

I'll be sad about not being able to run my 12s anymore, though. :(
I made the change to 13 inch rims and love every minute of the swap. I went to the Junk Yard, pulled off the old steel rims and tires from a 1996 and slamed them onto my 1993. Bought the right accorn lug nuts off of ebay for like $20 and have smiled ever since. You bet I grabbed the speedo gear to keep the tach accurate.

I too was thinking about this swap. BUT I DID THE TALLY AND $1,742.00 unshipped is a lot for new rear breaks. So far I've put $2,200 into my car in 3tech stuff, wheels, tach, bra, and hub caps. LOL Shoot I still don't have a decient radio.

Oh well. Guess I'll just stick with the stock drums. UNLESS.....

Any speculation on improved MPG's? Which would have more rotating mass? Rotors or drums? You bet the drums do. But will the gain in Fuel Efficiency be measurable?
Kevin
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Jittney
Anchorage 92 XFi

Would these fit?
http://sokyclassics.com/product.php?skcid=1001642&sid=76ba6d0fc014855adfe0f7ad6bd41a74
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clarkdw


climbinghalfdome
Jul 11 2012, 11:42 AM
hdsheena
Jun 22 2012, 01:30 PM
"in a nutshell, to do the swap you need to find donor parts from a suzuki swift gt, 89 thru 94."

Provided one had the funds, it should be theorhetically possible to purchase the stock parts new for the swap, instead of finding a donor car.. right?

I'll be sad about not being able to run my 12s anymore, though. :(
I made the change to 13 inch rims and love every minute of the swap. I went to the Junk Yard, pulled off the old steel rims and tires from a 1996 and slamed them onto my 1993. Bought the right accorn lug nuts off of ebay for like $20 and have smiled ever since. You bet I grabbed the speedo gear to keep the tach accurate.

I too was thinking about this swap. BUT I DID THE TALLY AND $1,742.00 unshipped is a lot for new rear breaks. So far I've put $2,200 into my car in 3tech stuff, wheels, tach, bra, and hub caps. LOL Shoot I still don't have a decient radio.

Oh well. Guess I'll just stick with the stock drums. UNLESS.....

Any speculation on improved MPG's? Which would have more rotating mass? Rotors or drums? You bet the drums do. But will the gain in Fuel Efficiency be measurable?
Kevin
If you like rear disks for the cool factor, put em on. The payback in fuel savings for the reduced rotating mass would be measurable in decades. Many of them.
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