RX7 brake upgrade

[corby_baby]

not my work, i know people asked before and i dont think i came across and clear cut answer but i randomly found this searching around google.


"Here's the big brake upgrade I made for my mazda 323 GTX.

It has FC3S RX7 4 piston calipers and 282mm X 22mm front rotors. The rear has the FC3S RX7 rear calipers (the wide ones from the turbo and other rear vented disc cars) with 262mm X 22mm vented rotors.

For those that are curious, the rotors come from a 1987 Acura Legend. The fronts are the front rotors for the coupe and the rears are the front rotors for the sedan.

The front kit requires permanent modification of the front knuckles (original caliper mounting ears need to be cut) and a set of custom brackets.

The rear kit only requires the caliper mounting holes on the knuckles to be tapped for M12 threads and a set of custom brackets. You also need to reroute the parking brake cables under the fuel tank and along the front lateral links to connect to the calipers.

You also need to turn down the ears on the hubs just like when doing the Mitsu Galant upgrade.

Lots of work, but the results are well worth it!"


pictures ----> http://public.fotki.com/danroyca/323_gtx_big_brakes/

[808]

Do you have to run 15" wheels for this?

[kaputt 323]

Excellent post!

One would have to run at least 15" wheels. No way for 14"ers. The FC RX-7 had 15". The turbo models got 16" towards the end of the FC span. 282mm is just over 11". The inner diameter of a 15" wheel is max 14". Hard to read tire size the in the photo, but it looks like 205/50R15. Interestingly, the caption of the same pic states the calipers required some grinding. Yikes.

[trailrider098]

i did some research on using rx7 calipers. unless using a custom offset wheel where the rotor sits on the hub only allows room for a single or dual piston style caliper

[Rocketman]

This is very interesting and temping, I have the Galant upgrade but having 4pots is a very enticing idea...

Any details about the wheels you have to run?

Not too hot on the idea of running brackets like that, but it is what it is

[azgtx]

That is Dan Roy's work....he lives up around Quebec. He is a long time Yahoo GTX member....and a Mazda/GTX GURU. Quite a bit of work put into that upgrade.
Clay

[BFMRGTX]

He's been happy with it for quite a while (2005). I still have info on how to do this.... somewhere, I think.

http://autos.groups.yahoo.com/group/323gtx/message/53566

[Mazda_Powered]

the FD rx-7 uses 50mm offset rims, so idk if the calipers will come into contact with the back of the rim...worse case scenario is you have to add wheel spacers, or if you're rich get different rims lol...

[Aaronbrook37]

Great post, unquestionably! Shame for that permanent modification, because kits would probably sell like hotcakes round these parts.

[trailrider098]

heres what i found, i used a stock wheel, corrado rotors, rx7 caliper, and it will not fit in there. with a 16 inch wheel it will, however the caliper hits the wheel hard and need about a 1 inch spacer. the other way is to get a rotor with a taller hat, setting it back farther. however this cant happen cause if the rotor was to go back it would be into the body of the knuckle

[808]

I guess I'll just stick with the Galant upgrade.. Need 14's to fit on the rally car for the simple fact that i have like 10 sets of 14's for it.

[corby_baby]

I guess I'll just stick with the Galant upgrade.. Need 14's to fit on the rally car for the simple fact that i have like 10 sets of 14's for it.

i also find myself choosing rims based on the size tires i own haha.

[808]

Especially at 150 a tire.

[RixAE86]

I know you can put these FC calipers on AE86 corollas too. it requires a custom brackets and presto!

[323gtturbo]

do you have the full instruction to install this upgrade ?