Mazda FC Caliper on AE86

[BlueAE86]

What is the latest information onthe best rotor combination to use with the FC caliper on an AE86 strut with the Japan Yahoo mounting brakets ??
Any Ideas
Anybody who has done this lately, it would be appreciated if you could pass on your information.

cheers

[oldcorollas]

you might want to research a bit about the piston sizes.
4pots < than single pot, due to smaller area.

unless they are mated to a larger disc, are you actually gaining anything?

[exquisit]

the weight
lol

^.^

[takai]

Actually FC calipers are heavier than the JDM AE86 calipers. And they dont fit under 14" rims.
The biggest advantage is for the circiut racers amongst us, where the larger surface area of the caliper, and thicker disc, can dissipate much more heat, and hold more heat before fade.

[Youngy]

Use a rim bigger than a 14. Your rim size should not be holding your brake upgrade back...........

[45aken]

who can order in these brackets? how much?
i can get them made up if i have cad drawings, but i need alot of people to be involved, as machining costs aren't cheap.

[takai]

Use a rim bigger than a 14. Your rim size should not be holding your brake upgrade back...........

Do note that some of us have to comply with regulations. Your statement is quite narrow minded here.

[TurboRA28]

I know someone who runs a AE86 in IPRA using FC calipers.. I'm sure he is running a 14" rim. It uses original FC rotors over a machined RA40 hub. Custom caliper bracket.

[takai]

Yeah, he does run them under 14s, but not with the Yahoo Japan bracket which was the threadstarter.

[TurboRA28]

Yeah sorry should have mentioned was a custom fabricated bracket.. Not an 'off the shelf item'.

[takai]

Yeah, i have plans to use an R/Z32 caliper with the Peugot discs. Will see how it goes. But that isnt the topic of this thread.

[TurboRA28]

You'd want some spacers behind each pad for that, being a caliper that usually holds a 30mm disc dropping down to what a 22mm disc?

Granted though.. not going to help this thread.

What about adapting a more simple dog n bone bracket for the FC caliper? Those yahoo jap ones from memory were not that cheap?

[Youngy]

Do note that some of us have to comply with regulations. Your statement is quite narrow minded here.

I have just re-read this thread and I was unable to find the regulations you speak of. Hence I stand by my statement.

[oldcorollas]

I have just re-read this thread and I was unable to find the regulations you speak of. Hence I stand by my statement.

he means
"some of us actually race our cars in actual races, not just tootling around the streets, and as such there are rules and regulations governing what modifications can and cannot be done to our cars." To say they should just use a larger rim may contravene regs, and put them out of their class....

fwiw, those 32 calipers weigh about 3.5kg each and are big suckers.. refer to my dimensions in cruzidas thread

anyway, i couldn't find the original article i was looking for, by a company that made caliper brackets for AE86.. they stated in great depth (with numbers to back it up) that due to smaller piston area with FC caliper, you get stupid rear brake bias because brakes are less effective at front. as such, tey recommended that a larger disc be used in conjunction with the FC caliper.

[takai]

Yeah, which thankfully R32 brakes have less of a problem with due to the piston size.
The article which you are looking for is on the old forum as well, improvedae86 made the point there which caused a small furore.

The R32 calipers may weigh 3.5kg but the Hilux calipers are around 7kg, and every kg counts.

[TurboRA28]

Oldcorollas , mate I remember reading that same thread. I'm sure it was on clubae86? maybe by the guy who runs technotoytuning.. cant trust my memory though!

But in the real world and not just on paper.. This guy I know who has the FC calipers on the AE86 reckons it can almost stand on its front wheels if you get on the brakes hard enough, and have the traction of course.

[BlueAE86]

I have the brakets from yahoo Japan but am still unsure what exact FC p/n / size rotor to use and wether it is bolted to the hub in normal fasion or have to machine the hub down and put over with longer studs ??

[TurboRA28]

The FC rotors have a rather large hat.. I reckon it'd have to go over the hub, if it it'll run into the control arm, strut, etc.

[Youngy]

he means
"some of us actually race our cars in actual races, not just tootling around the streets, and as such there are rules and regulations governing what modifications can and cannot be done to our cars." To say they should just use a larger rim may contravene regs, and put them out of their class....

Thanks for clearing that up Stuart. As far as I am aware my statement does not make me narrow minded.

[craigy]

A couple of mates and myself are currently in the process of soughting out a custom machined bracket to use RX7 calipers on an AE86.

We thought we were onto something when we found that an Audi A3 rotor was about the correct size to use a flat adaptor (cheap to machine) but when we got hold of the rotor it had too many holes in it and we couldnt drill out the PCD that we needed to bolt on the Sprinter hub!

So now we are probably going to use a Turbo Silvia rotor, which doesnt have the correct hat height to suit a flat adaptor, but you can offset the adaptor to suit (expensive to machine)

I would suggest checking out the old forums, there are CAD drawings for the silvia disk setup there.

cheers
Craigy