Rear Disc Swap Myths...

BuGS · Post by **BuGS** » March 13th, 2006, 8:07 pm

Ok, since I have heard many different things for swapping in rear discs, could some ppl please specify what exactly they used??

Like I know Josh used the 4cyl proportioning valve, and the V6 Master cyl and T-ed in the front left brake into the master cyl, but I have heard another guy said he just swapped out his proportioning valve but I don't get how he did that cause 4 cyl PV's have 5 spots and V6 PV's have 6!!!

So can someone clearify, do I even need to do proportinging valve or Master Cyl???

Thanks

Joey's mx · Post by **Joey's mx** » March 13th, 2006, 8:27 pm

I also heard you can use the protege or escort master cylinder and it is just a direct swap??

BuGS · Post by **BuGS** » March 13th, 2006, 8:32 pm

yes, I was looking at that also, but here is the funny thing.. The flow rates are suprisinly the same...

Got my friend to scann in the FSM from 92 for the MX-3 and I have the protege manual on my computer

Tunes67 · Post by **Tunes67** » March 13th, 2006, 8:46 pm

Dunno Bugs.. but I have a GS and a RS sitting in my driveway if you want to come by and check them out at any point

Tunes67

max kl · Post by **max kl** » March 14th, 2006, 12:52 am

i did o protogay lx rear dixk swapon torpedans mx3 rs and we swaped the whole rear proto. rear sys with the disk brakes control arms p brake cables and used the 4 cyl mx3 master cylinder and proporting valve

we were suprised how well the car drove but tried the proto mc anyways and found no diffrence

so rear sys from a proto or escort gt bolts on and works very well

torpedan · Post by **torpedan** » March 14th, 2006, 2:22 pm

BuGS wrote: So can someone clearify, do I even need to do proportinging valve or Master Cyl???

Thanks

Nope.

max kl wrote:i did o protogay lx rear dixk swapon torpedans mx3 rs and we swaped the whole rear proto. rear sys with the disk brakes control arms p brake cables and used the 4 cyl mx3 master cylinder and proporting valve

we were suprised how well the car drove but tried the proto mc anyways and found no diffrence

so rear sys from a proto or escort gt bolts on and works very well

Bastard i was going to mention that.

Anyways, to put it in clearer english... (i love you bro, really;then again my wordings are just as in coherant). Protege brake componets are interchangeable with mx-3 ones. Quite a while back we swapped the whole rear subframe from a protege LX into my Mx-3, its actualyl very easy to do and takes about the same amount of effort(if not less) than just swapping all the nessesary components.

We did not need to change out the brake proportioning valuve nor the master cylander, it worked beutifully and it delivers a dramatic effect on the cars braking abilities. You might need to get an alignment done though if you do this to your car.

BuGS · Post by **BuGS** » March 14th, 2006, 5:49 pm

Ya, I am off by like 1-2degrees so I went and got camber bolts and was going to installl them the same time, but I heard all you had to swap out was the proportioning valve, then found out that it really isn't any different and thought man, this sucks.... So I thought I would go ahead and ask

Thanks

jaydog5678 · Post by **jaydog5678** » March 14th, 2006, 6:08 pm

You really don't need to take the subframe down to swap discs in the back. It's all the same. The calipers are different for the Protege than the Mx-3 but you can also use the Protege hubs/calipers. If you use the booster and master cylinder from the v-6 Mx-3, you have to use the v-6 proportioning valve! It is different than the 4cyl Protege's and 4cyl Mx-3's. Most of the Mazda line up used the 7/8's mc. The Rx-7 and the v-6 Mx-3 use the larger 15/16's mc and I believe only the 929 used the 1 inch mc. I chose to use the larger mc...

illicitQ · Post by **illicitQ** » March 15th, 2006, 2:14 am

i did the swap and i used the rear spindles , the ebrake cables and the proportioning valve from an EGT. i kept the original master cylinder because they are no different.

jaydog5678 · Post by **jaydog5678** » March 15th, 2006, 11:27 am

The proportioning valve is the same as the Mx-3's.

illicitQ · Post by **illicitQ** » March 15th, 2006, 8:49 pm

i thought the one for rear drum and rear disc are different.. guess not.. oh well... i had the bleed the whole system anyway so wasnt much trouble for me.

Shades · Post by **Shades** » March 15th, 2006, 10:31 pm

Since I don't want to start a new thread and this is the same topic... I am gonna do the rear disc swap too... but all I have is the rear hubs off a EGT with calipers. By reading lots about this, that's all it seems I would need, right?

I was wondering if you need to get a new e-brake cable?

I don't need to change the MC or anything, do I?... eventually I will, but not now.

torpedan · Post by **torpedan** » March 16th, 2006, 1:59 am

Honestly i never really compaired the cables new vs old. Although the car can function without an ebrake so when in doubt you can just find out the hard way.

BuGS · Post by **BuGS** » March 16th, 2006, 10:39 pm

You need the ebake cables, and the brake lines themselves. So far that is all I know you NEED, besides the hubs and calipers..

Shades · Post by **Shades** » March 17th, 2006, 10:24 pm

Good thing I scrapped the Escort I got all the parts off... :banghead:

Forgot the grab the cable and lines... damnit!

MX-3.com

Rear Disc Swap Myths...

Rear Disc Swap Myths...

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