Speedworks

Hy there,


bringing up an old sore of mine. Over the years I have had different caliper sets (AP, Brembo etc), but as rare as the FD is in our regions, little is plug and play (except for Japan/US import items).


As the calipers currently in my posession are top notch, I want some discs to match.

With the upcoming trend of OE car makers to have high end brakes (drilled/slotted/etc) I was wondering if there is something out there that can be used on the FD (given a redrilled bolt pattern).

Merc/Audi/BMW (others?) must have interesting parts we can use.

Any body that has tested or tried one of these?

Please share!!!

thx

silverfdturbo6port

iTrader: (26)

you can use whatever you want all you need is someone to make adaptors

Speedworks

Sure, no doubt there but still you need to keep things in mind like offsets etc.

fe. The Mercedes S-Class has reasonably large front discs (drilled) and if they are capable of stopping an S, they sure can stop an FD

$lacker

iTrader: (9)

It seems like adaptors would be much simpler/cheaper to build, and therefore cheaper to buy, as compared to a name-brand BBK
Strange no one has done it
Any decent modern car seems to have huge brakes these days, so there would be a ton of common applications to choose from

Peruvianrx7

iTrader: (25)

Get evo 8s or evo 9 brakes they are plug and play

RENESISFD

iTrader: (13)

^ Says who?

airjordan223

iTrader: (8)

They definitely aren't plug and play. One guy on here has a thread about it but he gave up. I believe you have to retap the caliper holes and bore out the center of the rotors, but I'm not 100% sure.

Speedworks

bolt pattern is not a real issue as 5 bolt pattern is pretty common these days and redrilling to the FD's 5x114.3 pattern is no biggie.

Mean concern would be the 'offset' of particular discs compared to the FD's measurements.

Another example is a friend of mines 2012 BMW M3. hes has large drilled discs front and rear.

They seem to be worth a try. Given that most cars with rear discs have inner hand brake drum discs may cause an issue

gracer7-rx7

iTrader: (16)

I don't think you'll find any off the shelf rotors that can be used on the FD but might be an interesting exercise if you have time to kill.

Over the years, I have seen many people use Coleman Racing for affordable, high quality custom rotors for both street and race use. May be an option for you or try to find an equivalent company in EU.

Coleman Racing

ptrhahn

iTrader: (9)

I'm not sure what the "problem" is here.

What part isn't plug and play about the many existing kits out there? They are certainly going to be no LESS plug and play than trying to adapt OE stuff from another car.

Speedworks

Rotors aren't really the issue, rather the disc centers that need to be spot on to make things work.

Please mind I'm in Europe, and FD's are rare herre (only 14 cars sold in 1994) and US/Japan kits are hard/expensive to import and more than likely illegal acc local regulations. (Don't ask me why, I could write books about that)


Given that I have Brembo and AP calipers on my shelve, I would like ot find a disc solution that is fairly ease to find locally and at reasonable pricing.

HARD2B

iTrader: (1)

have you look in this post?
https://www.rx7club.com/3rd-generati...1029297/page4/

vitafist have done 6pot front and 4pot rear with big disc rotor conversion and im also in process of doing my own on Ferrari ccm brakes conversion.

$lacker

iTrader: (9)

The "problem" is that aftermarket big brakes tend to be very costly
If someone were to find a set of OEM calipers/discs that would fit and only require a custom bracket it would potentially be much more cost-effective

A set of Brembos is great, but if you could get similar performance for half the price via a set of Mustang/Corvette/whatever brakes and relocation brackets, that would be better for many people

ptrhahn

iTrader: (9)

What are you trying to achieve? Do you want better braking performance for track use, or just looks?

The OE brakes, or the OE RZ brakes are fine for anything but HARD track use. For track use, simply putting calipers on from another car with a relocation bracket will almost certainly mean the piston sizes are the wrong size, or unballanced front to rear, and will require other mods to really well.

Never mind, good track pads are $5-600/set for all four corners, and you'll go through them in an event or two, so the cost of the kit is really minimal.

GoodfellaFD3S

iTrader: (213)

Sell the calipers you have sitting on the shelf, and enjoy the hell out of these:

Competition Brake System - SakeBomb Garage

Unless (from reading your post above) you'll have some kind of regulatory issues with your country?

BLUE TII

iTrader: (9)

Speedworks-
Given that I have Brembo and AP calipers on my shelve, I would like ot find a disc solution that is fairly ease to find locally and at reasonable pricing.

If you can find what model number calipers you have you may be able to find someone who already makes a caliper adapter and adapts a rotor to the FD RX-7.

$lacker-
It seems like adaptors would be much simpler/cheaper to build, and therefore cheaper to buy, as compared to a name-brand BBK
Strange no one has done it
Any decent modern car seems to have huge brakes these days, so there would be a ton of common applications to choose from

In Japan, this style of kit with caliper adapters and machined/adapted rotors is common for the FD RX-7. They used to use Brembo F40/F50 calipers I believe, but there is probably better stuff available cheaper now.

The problems with these are-

They were made in Japan so the parts are expensive and/or hard to find.

If you track you use lots of rotors so it is way more money and work to use re-machined rotors in the long run than to buy a kit you can replace the rotor disks on (top hat and rotor disk style).

If you buy a used kit you need to figure out on your own what rotors to get and how to machine them to replace the old rotors.

As stated earlier, the initial buy in of a big brake kit won't be your biggest expense with some track time, it will be consumables.

If you make up a caliper adapter kit you should have top hats made to adapt a rotor disk to your caliper and custom bracket so it is cheaper/easier to replace rotor disks and keep your custom top hat.

But, with the cost of that you are getting close to a cheaper bolt on big brake kit.

Unless you are a machinist, but then you wouldn't ask these questions you would just make your parts.

I recently went with the Wilwood 14" 6 piston FD RX-7 front kit that sells for around $1,600USD.

I will get a review and pics up soon.

Speedworks

The AP calipers I have are the older CP5200 series. The Brembo's are brand new and were part of a kit from a bigger car (it's discs are 360mm front and 340 mm rear ;-))

That's about fundamentally my question. Maybe BMW M, Merc AMG or other high end makes/models have big (one piece) discs that have a suitable offset so it would only require redrilling the bolt pattern.

BLUE TII

iTrader: (9)

that have a suitable offset so it would only require redrilling the bolt pattern.

redrilling the bolt pattern (non precision) and machining to be hub centric- possibly with an adapter ring (precision).

BLUE TII

iTrader: (9)

AP Racing's own 6 piston FD RX-7 Kit (CP5570-1016R2.G8) uses 5570 calipers which they state are interchangeable with the 4 piston 5200 series calipers you have.

if your AP 5200 series calipers are for 330mm diameter disk you might be able to buy their rotor hat and caliper bracket for that kit and piece the rest together.


AP 6 piston kit FD RX-7 (CP5570-1016R2.G8)
Model Year 1992 to 2000
Brake Caliper Type CP5570
Brake Disc - Drilled N/A
Brake Disc - Grooved CP3580-2898/2899G8, Ø330 x 28mm / 48 Vane
Brake Disc - Plain N/A
Brake Disc - Strap N/A
Brake Pads CP5070D51-APF404
Wheel 17" Aftermarket



CP5570 Family Caliper - Suits Ø330mm Disc - 17mm Thick Pad

Features:
- Radial Mount, 152mm centres.
- Suits Ø330 x 28 or 32mm thick discs.
- Cast two piece Aluminium alloy body.
- Aluminium alloy pistons.
- Piston dirt seals fitted.
- Advanced Red or Black anti-corrosion paint finish.
- Steel wear plates.
- Pad anti-rattle clip fitted.
- Interchangeable with CP5200, 4 Piston Caliper Family.

Black Caliper Part Numbers:
- TO SUIT DISC Ø330.0x28.0mm.
- RHT = CP5570-802S4 / - LHT = CP5570-803S4.
- RHL = CP5570-804S4 / - LHL = CP5570-805S4.
- TO SUIT DISC Ø330.0x32.0mm.
- RHT = CP5570-810S4 / - LHT = CP5570-811S4.
- RHL = CP5570-812S4 / - LHL = CP5570-813S4.

Red Caliper Part Numbers:
For Red calipers add 'R2' to end of Part Number e.g.
CP5570-802S4R2


CP5200 Family Caliper - 152mm Mounting Centres - 16.8mm thick pad

Applications:
- Performance Road Front.
- Formula Brake Kits.

Features:
- Radial Mount, 152mm centres.
- Suits Ø330 max / Ø304 min x 32 or 28mm thick discs.
- Cast two piece Aluminium alloy body.
- Aluminium alloy pistons.
- Piston dirt seals fitted.
- Advanced Red or Black anti-corrosion paint finish.
- Steel wear plates.
- Pad anti-rattle clip fitted.

Black Caliper Part Numbers:
- TO SUIT DISC Ø330.0x32.0mm.
- RHT = CP5200-802S4 / - LHT = CP5200-803S4.
- RHL = CP5200-804S4 / - LHL = CP5200-805S4.
- TO SUIT DISC Ø330.0x28.0mm.
- RHT = CP5200-806S4 / - LHT = CP5200-807S4.
- RHL = CP5200-808S4 / - LHL = CP5200-809S4.
- TO SUIT DISC Ø304.0x32.0mm.
- RHT = CP5200-810S4 / - LHT = CP5200-811S4.
- RHL = CP5200-812S4 / - LHL = CP5200-813S4.

Red Caliper Part Numbers:
For Red calipers add 'R2' to end of Part Number e.g.
CP5200-802S4R2

Speedworks

wow that's quite a list :-)
I do remember years ago I contacted our local Ap specialist for the AP brake discs but they were overly expensive (given that I bought the calipers second hand but never used at a bargain.

Machining hub centric and or redrilling bolt paterns is no issue. I have some friends who can do that.

You might suggest they can machine a disc hat etc as well but they are not in an automotive field to just think that out.

BLUE TII

iTrader: (9)

Great! Its good to have friends.

Grab your stock FD rotor and head to the auto parts store. Tell them what you are doing and they should let you in the back to compare rotors.

Find a rotor with a larger diameter hub and hub centric center bore with a similar mounting face to rotor disk offset of the diameter you want.

If it is the correct 5 on 114.3mm bolt pattern all you have to do is have your machinist friend machine a thin disk with hub centric ring that will fit tightly between the rotor and the hub to center it.

That will be best because then you can use stock un-machined rotors when you replace them.

Then, put your caliper on the newly adapted disk and measure for your caliper adapter.

Draw up the parts with dimensions for your machinist friend.

ptrhahn

iTrader: (9)

Coleman racing has replacement disks for most every "kit" out there, or can make them, and can make custom hats to your spec, which would be a lot easier than finding some OE rotor and re-drilling it... and a LOT easier than doing that every time they wear out on track.

kulluminati777

iTrader: (7)

I know this is an old post BUT ceika performance makes a kit for the FD thats custom colors rotor size the whole 9. just putting that out there lol