FD Calipers on a FC Turbo II
 

Ok so i just got these FD Calipers Front and Rear,And was wondering a couple thing's i no the Calipers up front will bolt right on no mods needed,And im running the FC rotors up front so there should be no Problem with fitment as far as that's concerned,My Qusetion is will the rear calipers bolt up? And im going to upgrade to Stainless Lines so id need to Know if i need the FD Stainlees Lines or the FC Lines when going about buying,I Know i no of a couple peolpe whom have done this on here but i couldnt find anything on the rears or the lines being the same,Any Help would be Great.

I was just thinking about this same upgrade and would like to know the same thing. Would the rotors be a direct swap too?

the front calipers are almost the same, so they just go right on. the rears i'm not sure about, but they use the same pad and caliper piston size, so i don't think there would be any difference, or advantage to using Fd calipers in the rear.

the FD has a different offset on the rotors so they won't swap over

Yeah i talked with someone at Mazda Trix yesterday and he said pretty much the same thing the Fronts were a directed Swap but the rear's are not so,My plan is to use the front FD calipers up Front and used the FC rotors up front and leave the back the way it is except for upgrading the Lines and running some Hawk HPS pads!

i thought the FD caliper has a different PCD.. so doesnt bolt to the same mounts
.. the main change has the internal crossover port now built into the raised pad that has the mazda font.. when in FC it was a small cast lump.. which limited some wheel choices

What are the advantages of FD calipers? I'm about to upgrade my stock brakes but if FD brakes are better I may just swap the fronts

The casting looks different.
FD/FC calipers use the same brake pads and rebuild kits, so there's no mechanical advantage either way.

Il Post some pics here soon of the install before and after!

rx7 fd calipers on a fc
 

He are the pics as promised,The FD Calipers bolted right up,No modifacations needed.

Is there full pad contact?
I though the Fd calipers would have an overlap onto the outer edge of the rotor.

Well they definitely look better than the FC. Much cleaner/modern look to them.

I no This post is a bit old but havnt drove the car all that much since the Caliper swap and I been noticeing a faint line on the front rotors its not grooved but its like the front caliper pads aren't making full contact with the rotors up front it stops fine just not sure whats causing this problem any help or suggestions to fix this problem would be great!

Pictures?

I"ll get some here tonight or Tomorrow.

FD Front Brake Caliper Issues
 

FD Front Brake Calipers issues:scratch:

Heres the pic! Like I said its not grooved as in if you run your hand over it,You cant feel it. Just trying to figure out why this is happening. car brakes fine no squeals or noise at all.

Looks like you have something wedged or a hard spot in the pad. Is the spot raised or is it recessed into the rotor?

Is it happening on both rotors? Just bought a pair of FD front calipers for my 5 lug swap so hoping this is not the case.

Check the clips

Its not Raised it recessed but you cant feel it when you run your finger over it. It's on both front rotors as well.i don't understand everything bolts up just like the FC Calipers shits got me puzzeled lol. All the clips are on.

has to be something with the pads. I have had fd calipers on my car for years now with out any problems

Im running Hawk HPS Pads as well.

Ive had clips shift a little bit and make slight contact with the rotor, sometimes only when the brakes were applied and they would shift over a little bit, peening them over would lock them in place better

Ok Thanks Bro, I'll check that out and see if that is what the problem is.

This happens to me all the time when I install the pads on the wrong sides on single sided calipers.

It actually happened to me on 2 brand new cars

I Have A Pair On My Car Only Issue Was The Calipers Was Rubbing On in Inside Of My Wheels. Riken Mesh Put Stock Wheels Back On No Rubbing -_-

Rx7 Disks
 

You can use all of the FC parts with the FD caliper, including pads, rotors, spindle, and hub. The FD calipers is functionally identical to the FC one, except for a slightly more modern casting. I think even the rebuild kit is the same.

Mine bolted up fine (although I have a spacer between the hub and the rotor because I have 4 lug hubs), on a 5 lug hub they should bolt up without modification. In all fairness I haven't tested it yet, but all the parts bolt together and move as they should. And many others have done this before me with success.

EDIT: I should also mention that there is no advantage in function, only form. They look newer, but the calipers have no extra braking power (I think even the FD rotor is only 1/16 inch greater in diameter). If you're doing it for aesthetics or because the calipers are on hand, go for it. But I wouldn't go out and spend money on it otherwise.

A friend of mine and myself were debating this recently, oddly enough. I've never understood why I've seen and heard of so many people over the years going on about FD brakes over their previously 4 pot FC brakes. As far as I've always been aware, there is zero performance benefit.

In my opinion the FC 4 pots look more beefy from a visual standpoint. They're different from today's plain Jane smooth calipers.

I bought them because I was upgrading from single piston calipers, and because they were cheap and available. According to Rockauto they use the exact same rebuild kits, so I very much doubt there's any difference in piston size/depth. Also according to Rockauto, they use identical brake pads and springs. I know the FD rotors have greater diameter, which I find puzzling as the pads are identical. FC 4 piston front rotors are 277mm in diameter, and a series 6 FD's are 294mm in diameter (conflicting with the 1/16 inch difference I incorrectly stated above). Obviously FD's don't have 17mm of unused disc space, and the pads are the same and they don't hang off of my FC rotor, so I think the extra diameter comes from thickening the cylindrical wall of the hat portion on the FD caliper and spacing the caliper out further (unless I'm horribly misunderstanding something). They are both 22mm in disc thickness new, but the thickness of the hat is different. Either way, since the pad contact area is identical, the only benefit would come from better cooling due to greater mass (which I can't test, but assume would be negligible).

Visually speaking, I prefer the look of the FD calipers. I think the lines are a bit cleaner. However the bigger casting may interfere with wheel selection.

If someone happens to have an FD rotor and an FC rotor laying around to compare visually, that would be very useful. Considering this thread has been revived after several years of inactivity, it would be prudent to add as much useful data as we can.

I can confirm that the FD calipers make it easier to fit certain aftermarket wheels without wheel spacers as the FC calipers are quite bulky and can foul on the inner wheel.

It is correct that the calipers are functionally identical and use the same rebuild kit. The pads are also the same. However the pad hardware, anti-rattle springs etc are different.