Rear brakes - balancing large fronts
Starting a new thread here so we don't jam up Sav's thread with this stuff.
So I've been on the hunt for Sport rears (among other Sport brake components) for my 1.6 car. I see recommendations for the M-Tuned bracket kit (to allow use of the Sport rotors with 1.8 calipers), but I want to find the bracket for Sport rotors for two reasons: 1 - I want the Sport's larger piston 2 - 1.6l car, I'd have to source calipers anyway (might as well get what I'm after, right?) I'm assuming I can simply get the calipers from most auto parts stores, same with the Sport BMC and possibly booster. So I suppose it's finding the bracket which is holding me up. I've emailed sites like Planet Miata and my emails have gone unanswered. Any leads? |
My local Napa carried them (caliper with carrier)
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There are no brackets??
the sport brake caliper is offset to fit a ~10.75" brake rotor. I found this out the hard way (which ultimately saved Braineack's ass).... 1. car came as a base model with teenie 01 rear brakes 2. I upgraded to the mystery Panache v8 big brake kit that used rx7 rear calipers. 3. I sold my stock brakes, calipers and all 4. I re-upgraded to the good-win version 3 kit which got me better rotors and hats and switched back to the stock rear brakes (sport or regular + brackets) 5. I bought calipers somewhere.. realized I didn't need caliper brackets with them and returned the brackets. 6. I bought brake pads "for my car" and they didn't fit but I held onto them for some reason. 7. today, several years later, brainy came over to figure out his crazy rear brake wear and noise problem. turns out his pad backplate got stuck in the caliper and the piston bent the pad and backplate all crazy. he needed stock non-sport pads. I had both sport and non sport. (sport are quite a bit more surface area fwiw). 8. he has brakes and didn't have to drive a no-brakes car somewhere to get pads. so... yeah the sport rear caliper is offset the same as the spacer bracket already. http://forum.miata.net/vb/showthread.php?p=4508004 look at post 74: http://forum.miata.net/vb/showpost.p...7&postcount=74 you can kind of see how the sport brakes mounting holes are further from the center of the piston. the slider brackets also fit the larger pads. if you buy the sport/msm calipers, you should get the whole assembly. sadly though, raybestos and beck arnley dont list them. autozone carries the duralast ones but they're $76 plus a 60 dollar core. |
dgmorr, what was NAPA's price?
Most vendors I've found know these are sought after & rape you. Best I've seen is $470 + S/H for a new pair. http://www.r1concepts.com/mazda-miat...liperwheel.htm http://www.r1concepts.com/PartImage/14145518.jpg |
Koto, I think you can use your 1.6 calipers with the sport rotors and m-tuned's bracket. Same way we can use our 1.6 calipers with 1.8 brackets to use the larger 1.8 rotors.
Why the lust for the larger piston? |
Originally Posted by y8s
(Post 701049)
There are no brackets??
the sport brake caliper is offset to fit a ~10.75" brake rotor. So then if there is no "Sport" bracket, my shopping list would be: Sport calipers/pads Sport rotors 1.8 brackets Sport lines? (Different from 1.6 somehow? Am I assuming again?) Wilwood adj. prop. valve Optional: Sport BMC/booster/underhood lines |
Originally Posted by curly
(Post 701054)
Koto, I think you can use your 1.6 calipers with the sport rotors and m-tuned's bracket. Same way we can use our 1.6 calipers with 1.8 brackets to use the larger 1.8 rotors.
Why the lust for the larger piston? He's never steered me wrong. He mentioned using stock calipers as well, but agrees that the Sport caliper is a more ideal solution. |
calipers come with the brackets... these are the things that you clip the pads into and have sliders and mounting holes. they bolt to the rear hub holes.
I'm not sure about lines. I don't think you need to do anything under the hood. (except prop valve if you want) so your list might just be sport calipers sport rotors sport pads and then check the lines. I'm sure someone on miata.net has laid it all out. |
FWIW sport rear brackets brandie new cost 65 bucks apiece from MazdaSpeed.
Compared to 1.8 "normal" rears, Sport Rears add about 30% more rear braking action. About 1/3 of that change comes from the increased leverage from the greater radius of the larger rotors. About 2/3rds comes from the larger piston squeezing harder, like Hustler's Mom. |
Awesome, I should have started this thread some time ago, thanks. Good info all around.
y8s - Yeah I don't need to do anything under the hood (except the prop valve) but there're a lot of posters in the dotnet thread you linked who go to bigger BMCs. I might see how I like the stock BMC with the TSE fronts and Sport rears.. but I'm anticipating a lot of pedal travel from the swap. |
Koto, the single caliper I bought was $150 CDN. I have a used passenger rear sport caliper with a stuck bleed screw. There was an $80 CDN core charge in lieu of returning my used one. If you put $80 in my hands it is yours.
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I just upgraded to the rear M-tuned upgrade. So stock 1.8L calipers with the 10.9" rear sport rotors. I already had the 11" front rotor upgrade and this significantly improved the balance, I'm a happy camper now.
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Originally Posted by kotomile
(Post 701078)
Awesome, I should have started this thread some time ago, thanks. Good info all around.
y8s - Yeah I don't need to do anything under the hood (except the prop valve) but there're a lot of posters in the dotnet thread you linked who go to bigger BMCs. I might see how I like the stock BMC with the TSE fronts and Sport rears.. but I'm anticipating a lot of pedal travel from the swap. |
Hmm, cool. I'll give it a shot.
Got a possible lead on some Sport rears from a PM. :) |
So do we know for sure if 1.6 rear calipers will work with 1.8 brackets, mtuned's bracket, and the 10.9" rotor?
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Originally Posted by curly
(Post 701544)
So do we know for sure if 1.6 rear calipers will work with 1.8 brackets, mtuned's bracket, and the 10.9" rotor?
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Originally Posted by Braineack
(Post 701620)
that's what I'm using.
Originally Posted by Braineack
(Post 701131)
So stock 1.8L calipers with the 10.9" rear sport rotors
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whoops. Well they are the same thing. I meant to say brackets.
But yeah, 1.6L car: 1.8L caliper brackets, 1.6L calipers, M-tuned Bracket, 10.9" Sport rotors. |
I got a 4-wheel MSM setup from Tom @ PartsGroup. The MSM rear calipers are larger than standard 1.8 calipers. It was a significant improvement over standard 1.8 brakes. The F/R balance is substantially better than the stock 99 setup, and I have no pedal problems with the standard NB master.
I have read that the MSM/sport lines are somehow different than standard lines, but when I did the swap I couldn't see what the difference was. I went ahead and used the new lines because they were new, but I could have used the original lines if I had to. |
Looks like 1" 929 master cylinder with the Sport Non Abs low boost assist vacuum booster and Sport calipers would balance out the front BBK the best after some reading. Maybe add a MC brace if you want stiffer brake pedal feel?
Found some info regarding 929 MC installation: http://robrobinette.com/mastercylinder929.htm |
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