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RX-7 2nd Gen Specific (1986-92) RX-7 1986-92 Discussion including performance modifications and technical support sections.


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Old 10-13-2008, 06:44 PM   #1
WE3RX7
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Default FD Calipers dwarf FC rotors

I was playing around with some parts I had today while working on my FC project. I wanted to firm up the belief that the FD calipers bolt to the FC hubs just fine and should allow you to run a larger front rotor. My initial guess would be yes - you can. Although, I dont plan to run this setup so I'm sure I wont be able to finalize any spacing/modification issues, but it all seems possible.

Just thought I'd share..


For reference, the FD rotors are 11.6 to a stock FC of 10.8. Seems like a cheap big brake kit to me.
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File Type: jpg fdcaliper_fchub.jpg (98.1 KB, 27 views)
File Type: jpg fdcaliper_fchub2.jpg (133.7 KB, 39 views)






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Old 10-13-2008, 06:46 PM   #2
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Ahem.....FC and FD calipers are the SAME and interchangeable.

Cough....
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Old 10-13-2008, 06:51 PM   #3
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I'll contemplate the rotor swap when I start outperforming the stock TII brakes.

Keep us posted.
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Old 10-13-2008, 06:56 PM   #4
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fc and fd calipers are different.. not sure why but looking in my book they are different part number..
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Old 10-13-2008, 07:03 PM   #5
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FC and FD calipers are not the same at all.

FD calipers have a different pad design/pin design and FC rotors are much smaller than FD, thus the FD caliper is space higher.

I have both FD calipers and FC calipers and rotors sitting in my garage if you'd like a comparison....

The FC rotor is about 10.8" and the FD is about 11.6" and they are different thickness.

I cant speak the exact swap though as I'm not planning on using the FD front calipers, they are for sale though
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Old 10-13-2008, 07:08 PM   #6
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Are your comparing 4-lug FC to FD? Or 5-lug FC to FD?
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Old 10-13-2008, 07:18 PM   #7
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In that pic its 4 lug... but even the 5 lugs are still 10.8" rotors. I'm simply stating that it seems like 5 lug FC guys could swap out to the FD caliper and rotor fairly easily (some modification of the brake line would be needed) and that would let them run an 11.6" rotor easily w/out needing to buy a big expensive BBK....

No? - maybe that extra space for the rotor comes from the hub, but I dont have an extra FD hub to compare to.
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Old 10-13-2008, 07:28 PM   #8
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S5 gxl turbo FC and FD calipers and brake rotors are different

they use the same brake pads though
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Old 10-13-2008, 07:43 PM   #9
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Same pads huh? didnt know that one...

But thanks for confirming the rotors/calipers are different on FC and FD, I just couldnt see how they'd be the same.
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Old 10-13-2008, 09:55 PM   #10
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that does make it much easier to find pads (like on ebay..)

i have "FD" Hawk HP+ all around.
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Old 10-14-2008, 12:42 AM   #11
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The "big" FC brake calipers and FD brakes calipers are functionally the same.
The FD brake calipers are "squeeze cast" (or something like that) where they are slightly lighter.
Look up any aftermarket brake pad for the FD, and it will be the same exact part number for the FC "big" brake caliper.


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Old 10-14-2008, 07:12 AM   #12
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They are still interchangeable.

Although Mazda lists different part numbers, most of the aftermarket lists the FC and FD calipers as the same.
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Old 10-14-2008, 07:42 AM   #13
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Thats what I am saying here in my aftermarket world (at my shop) we list them as different calipers..

the bore, bleeder and line size of course is the same but they look a touch different.
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Old 10-14-2008, 07:44 AM   #14
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Quote:
Originally Posted by RETed View Post
The "big" FC brake calipers and FD brakes calipers are functionally the same.
The FD brake calipers are "squeeze cast" (or something like that) where they are slightly lighter.
Look up any aftermarket brake pad for the FD, and it will be the same exact part number for the FC "big" brake caliper.


-Ted


Yes I am sure the calipers are interchangable (like mazdaspeed protege and v6 626 calipers are interchangable)

and yes the pads are the same (did I not say that already LOL)

rotors are different..

and if u are looking for pads and rotors hell I have them on my shelf!

SCREW EBAY!
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Old 10-14-2008, 09:19 AM   #15
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Here at my aftermarket world, we sell them as the same part number (86-95).

Good news is they are all the 93-95 design, so they are slightly lighter.
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