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Old 04-17-2006, 02:36 AM   #1
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Default Interest in RX7 Big Brake Kit Brackets?

*Disclaimer: I am just a regular guy, not a fabber of any sort, just a hobbyist/enthusiast*

I was doing some research and it seems as if the 86-96 RX7 Front 4 piston calipers and 86-92 (and maybe 93-96) rear calipers can be made to fit with new brackets and some minor modding to the calipers, using the sport brake front rotors in the front and the 1.8 front rotors in the back. Would also require 15" wheels.

I found a shop that would be willing to make me the brackets, but I need a minimum of 4 orders to get them done.

Would 3 other people be interested in getting them made? They would cost about 120 for the front bracket pair, and probably the same for the rears.
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Old 04-17-2006, 12:28 PM   #2
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If you need calipers, there are 2 turbo RX-7s of that generation in a u pull it salvage yard near my home.
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Old 04-17-2006, 04:03 PM   #3
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PMed you.
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Old 04-17-2006, 04:23 PM   #4
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which rotors in the front?
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Old 04-17-2006, 04:36 PM   #5
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Quote:
Originally Posted by turbored
using the sport brake front rotors in the front and the 1.8 front rotors in the back.
um... the sport brake front rotors....
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Old 04-17-2006, 05:32 PM   #6
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sport brake from the NB?
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Old 04-17-2006, 06:14 PM   #7
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yeah NB sport brakes.
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Old 04-17-2006, 09:35 PM   #8
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There have been a couple discussions at miata.net about this kind of swap. Might be worth checking out. I saw those front calipers in the boneyard and they sure looked sweet. If I didn't already have a Panache kit on my car I'd be all over the idea.
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Old 04-18-2006, 04:02 AM   #9
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SO this replaces the front and rear calipers with ones from a RX-7?
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Old 04-18-2006, 05:10 AM   #10
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Is my wording that confusing/vague? Yes. RX7 calipers. 1.8 front brakes on the rear NB front sport brake rotors in the front.
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Old 04-19-2006, 02:17 AM   #11
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id be interested in the brackets and calipers.let me know whats up. email me at [email protected]
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Old 04-20-2006, 12:33 AM   #12
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how much would it be if i supplyed the aluminum? i have a big brick in my shop i was going to use for the convertion but i got lazy.
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Old 04-28-2006, 05:15 PM   #13
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any updates on these brackets? Interested as well.
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Old 02-21-2007, 10:56 PM   #14
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Quote:
Originally Posted by turbored View Post
*Disclaimer: I am just a regular guy, not a fabber of any sort, just a hobbyist/enthusiast*

I was doing some research and it seems as if the 86-96 RX7 Front 4 piston calipers and 86-92 (and maybe 93-96) rear calipers can be made to fit with new brackets and some minor modding to the calipers, using the sport brake front rotors in the front and the 1.8 front rotors in the back. Would also require 15" wheels.

I found a shop that would be willing to make me the brackets, but I need a minimum of 4 orders to get them done.

Would 3 other people be interested in getting them made? They would cost about 120 for the front bracket pair, and probably the same for the rears.
¿Still available?
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Old 02-22-2007, 02:31 AM   #15
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why not just go with the miata Sport brakes all around? I saw a set including rotors, calipers, and used pads for $300 on a dedicated miata salvage webpage, and even less on some others.
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Old 02-22-2007, 11:26 AM   #16
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miata rear sport brakes already have "brackets".. they stick out further than the non-sport brakes. on the fm/goodwin kit you either get a bracket to move them or no bracket if you have sport brakes. I found this out the dumb way:

1. had panache-like bbk that used rx7 rear calipers
2. side-graded to goodwin kit
3. ordered recycled rear miata calipers of unknown type
4. couldn't figure out where to put bracket on rears
5. oh duh, I had sport rear calipers (sold mine ages ago when I put in the panache)
6. returned bracket for refund
7. put 2 piece rotors on rear.

for what it's worth, the miata rear brakes (size: large) have more than enough stopping power. on the track I find I have TOO much rear bias with stock pads with the goodwin kit (*** goes ***** nilly if I even THINK about trail braking). I'm moving to a more aggressive front pad to compensate.
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Old 02-22-2007, 12:32 PM   #17
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Quote:
Originally Posted by y8s View Post
for what it's worth, the miata rear brakes (size: large) have more than enough stopping power. on the track I find I have TOO much rear bias with stock pads with the goodwin kit (*** goes ***** nilly if I even THINK about trail braking). I'm moving to a more aggressive front pad to compensate.
You should get an adjustable brake bias valve (also known as a hydraulic flow control valve) and put it in the rear brake line. This effectively raises the amount of braking pedal input to cause the same rear stopping power while at the same time decreases the front. If you just put more aggressive pads on the front you will generate more weight transfer off the rear and could make things worse.
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Old 02-22-2007, 12:34 PM   #18
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Quote:
Originally Posted by Arkmage View Post
You should get an adjustable brake bias valve (also known as a hydraulic flow control valve) and put it in the rear brake line. This effectively raises the amount of braking pedal input to cause the same rear stopping power while at the same time decreases the front. If you just put more aggressive pads on the front you will generate more weight transfer off the rear and could make things worse.
is them just dem fancy words for an adjustable proportioning valve?
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Old 02-22-2007, 12:40 PM   #19
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is them just dem fancy words for an adjustable proportioning valve?
that's exaclty what i was thinking while i was reading that post....i think it is.
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Old 02-22-2007, 12:54 PM   #20
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Quote:
Originally Posted by Arkmage View Post
You should get an adjustable brake bias valve (also known as a hydraulic flow control valve) and put it in the rear brake line. This effectively raises the amount of braking pedal input to cause the same rear stopping power while at the same time decreases the front. If you just put more aggressive pads on the front you will generate more weight transfer off the rear and could make things worse.
pads are easier

i'll forget what i've heard about bias valves and just ask: at steady state (brakes on hard) doesn't the system pressure equalize and you're back where you started? Or is it a matter of less fluid flowing to the rear means less braking on that end because the pistons aren't moving as far?

and ultimately, isn't the weight transfer the same? if my deceleration rate is the same, physics takes over and the car rotates around the CG just as before.

ideally I just want the fronts to reach their threshold before the rears.
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