FD rotors on a FC
 

The questions comes up often...

Do they fit? What does it takes to install them on a FC?

I've been talking to Respeed, and they are willing to make the bracket\spacer so that we can use FD rotors on our FCs.


Per Respeed, there is a problem with the FD rotors:

"The problem is the ID of the rotors, 72mm on the FD verses 77mm on the FC. I know the FC rotor is tight to the FC hub so the FD (72mm) will not slide over the FC (77mm)

This could be turned out but that means each new set of rotors would need machine work."

Any comments? Would there be any interest from the FC guys?

If there is enough interest, maybe he'll try a larger than the FD rotors and design the proper spacer\adapters for the calipers :fingersx:

Pleases discuss :)

FD rotors = S5 Turbo

Wrong, search and come back again





FD calipers are "bolt on" supposely, rotors got different offset to fit on the hubs
stock FD rotors are 294mm (11.6")

mustang cobra rotors works
http://www.v8rx7forum.com/v8-rx-7-bu...tml#post445114

so does these 12.75 x 1.18" rotors
https://www.rx7club.com/suspension-wheels-tires-brakes-20/mandeville-style-4-wheel-big-brakes-fc-feedback-needed-739122/

I am interested in something like that
but i am still looking for rotors with brakes that will fit under 16" race rims / tires

fyi Joe is saying with the 12.75" rotors it'll need 1/4" to fit in 16" rims.

https://www.rx7club.com/showthread.php?t=739122

I would like to see something like frijolee's kit without the spacer needed in the caliper.

I would also like to see something that doesn't require every single replacement rotor to need as few $$ worth of machining to make it fit. Something off the self would be perfect. Brembo blanks maybe? Hell a 2 piece would be awesome too.



I am willing to spend the bread for aftermakt calipers though. I was told to stay away from Willwoods at all costs. Apparently they flex like CRAZY. Of course this was Brembo engineer that was telling me this.

Billy can build anything, if he can figure it out, I would give it some VERY serious consideration.

What options SPECIFICALLY are out there for FC's? I know about the KVR kit for $2850 but that is only the front. Add in Corksprts Rear brake kit and now we're over $3000. So - what else is out there? I know Rocklobster was itching to get a set made by FastBrakes. Anything ever happen with that?

Here's KVR's

http://corksport.com/store/image/a5c..._kit_4_POT.jpg

18mm larger diameter and 2mm taller hat

https://www.rx7club.com/attachment.p...1&d=1221285752

thats a little scary... why machine them down that much?
http://i10.photobucket.com/albums/a1..._/IMG_1434.jpg

I *THINK* YaNi was talking about the engine rotors. :)

Respeed will look into other possible rotors, and I did sent him a link to the frijolee link. Let's see what happens :icon_tup:

Agree, that would keep the cost down, and would attract a higher amount of buyers (yadda yadda, you know the whole FC community story)

I would also like to see something that doesn't require every single replacement rotor to need as few $$ worth of machining to make it fit. Something off the self would be perfect. Brembo blanks maybe? [/QUOTE]

The FD guys have a two piece rotors. If we could get the spacers\adapters made, not only we get an extra .125 diameter, but also the option of 2 piece rotors :)

I don't think there is a market for a kit that cost that much money.

AP calipers are so tits.

My mistake, I was thinking engine rotors. I read the first few lines and assumed since the question hasn't been asked in a couple weeks.

Personally, what I'd love to see is something along the lines of an 11.75" x 1.25" rotor using the stock calipers with a spacer and a re-location bracket for an inexpensive, track capable setup that fits under 15" wheels.

You need to machine them because the stock rotors are smaller in diameter, so have a tighter arc to them. In order to get full pad contact, you need to machine the caliper edges to match the arc from the rotor. I believe those holes are for the bolts that hold the caliper halves together, not the fluid passages, so it should be safe enough to do. You wouldn't need to machine so much if you used smaller rotors.

The spacer is great, because it allows you to use a wider rotor that flows more air for better cooling which allows you to use smaller diameter, lighter rotors that fit the calipers better and will allow the use of smaller wheels.

That would be true of the cheap, small Wilwoods, but the bigger, better, more expensive ones will be comperable to something from Brembo or the like.

http://www.awrracing.com/store/index.php?cPath=1_44

There you go, 2 piece rotors for the FC. They do require that you machine the hubs a bit for clearance and that you grind a bit off the inside edge of the front pads to clear the fasteners, but there are certainly 2 piece rotors for FC's.

I have taken the TII calipers apart before and understand which holes are for what... my point is... at some point the caliper is going to be overworked, lets face it... . by todays standards these calipers are pretty small and Mazda developed them originally for 276mm rotors and then decided that they could work effectively on the FD with 294mm rotors


I think if you go any bigger then it would be wise to upgrade the caliper to avoid overworking such an important part... but hey thats my personal opinion

Yes going with calipers designed for bigger rotors would be better, but that's not exactly as budget friendly.

on top of that there already are big brake kit with bigger rotors / calipers already

I'd like to see a 12"+ rotor. Personal preference. You can get away with (usually) 16" wheels becuase they were stock on rx7's



I apprechiate what frilolee did but my personal preference would be to NOT take the caliper apart and add four more potential leaks


That is good to know. I really want to hear back from Rocklobster on his fastbrakes setup. I would definately rock what he was describing. Front and rear BBK that offset the bias by less than 1%

I agree. I would be all for a bigger 6-pot caliper.

Fuck budget friendly and the cheap kiddies who can't afford them. Why cater to people with no money that bitch over every little thing. Most of them have no use for something like this except to fill out those mad tyte dub's with super stretched tyyyyyyresssssss YO! Screw them, bigger rotor, bigger cailper (with lots of pad selection), keep it around $1000 & I'm in.

FD rotors are 11.6" if u want to use 16" wheels you'll pretty much have to keep the rotors below 12.25" but i couldnt find anything that size.
its either 11.7 or 12.6, nothing in between


u want a bbk for $1000 with 12"+ rotors and caliper, yet u say not to cater people with no money
go buy urself some k-sports. oh wait, u cant even get k sports for 1000

Budget friendly is always good, as long as you can get quality stuff that fits your needs. There's no point spending more than you have to, because then there's less left over to spend on other things.

The reason I say 11.75"x1.25" rotors is that I know that they're probably the biggest rotors you can fit under 15's (I've seen it done), and for track work, 15's are good because they're cheaper, you get a gearing advantage from sherter tires (225/45/15 for instance), and it gets you lower to the ground for less weight transfer for more grip. They're also easier to pack in the car. Even if you're running bigger wheels and tires, more power, etc, they'd still fill out the wheels a bit better and provide you with a lot better stopping power.

Since I know that you're not afraid of fabrication, why not piece together your own BBK using off the shelf Wilwood parts? You should be able to do one for under $1000.

I am not opposed to running 17's

RockLobster was talking about a BBK for around $1000 that used Wilwood 4-pot cali's (+$250 for 6-pots) and two piece rotors.

I agree, that's why I was so excited to see RockLobster put forth the effort. i may just have to get intouch with FastBrakes and see what the deal is. I bumped his thread in the GB interest thread. We'l see what happens.

All very good points. I am currently running 17" Koseis that weigh about 17-18lbs each. As for the shorter tire, well I can always get a really short side wall but that has it's own disadvantages.

True, I am not afraid of fabrication nor proper measuring tools. However, I am not a machinist or a mechanical engineer and a BBK is something that I would not build. WAY too much liability involved. Even if it stays on my own car. I've already made up my mind on this. A good friend approached me about it & I was very skeptical. He has a friend who is a pro racer and owns a shop a little farther up north. I would probably do it with the three of us, but not alone. No way.