Hi, well this is my first post here, hopefully i can get some great info...

I've just bought a FC turbo, and as part of my initial "upgrade" i want to up the brakes, but not a full on outfit.

I want to keep the stock 4 piston calipers as i beleive they are very good, but i want to increase the size of the rotors. I am hoping to go for 304mm rotors so they fit within my 16" wheels. first of all, how are the 4 pot calipers with 304mm discs? i assume someone has done this upgrade already...

second, i have heard that the stock calipers can be widened to allow 28mm thick rotors? is this true? are they available for purchase on the internet (i live in australia)???

anyway, i'm sure i'll have plenty of questions to follow! what i have seen so far i will really enjoy this community!

andrew.

 

you should just go with slotted or crossdrilled rotors and good pads. would probably save you some money. the 4 pistons are good though.

 

i'd still prefer to go with larger rotors for that extra stopping power and to reduce brake fade during track days...

 

how are you going to move the caliper? its fit for a certain diameter rotor.
slotted/drilled assist in reducing brake fade.

 

get a bracket made up that moves the caliper out further

 

maaaaybe, but remember, when you change diameter, the outer angle changes as well. i'm not sure how much this affects it, but take it into consideration.
as for the bracket, i'd have to see one to be convinced. sounds iffy and strange.

 

i got the idea from Mandeville auto tech (read about it on rob robinette's site) - they use this method, but with 13" rotors ... i dont want to go with 17" wheels though.

how many mm are the stock rotors?

 

i really have no clue what diameter the stock rotors are. i want to see the setup. it sounds weird, but i have no experience with it.

 

here's the link to rob robinette's site : http://robrobinette.com/bigbrake.htm

it is an FD site, but i cant see any reason why it wouldnt work on an FC

 

there is a big brake kit avalibale on www.k2rd.com i can never get the site to work.

 

good luck finding someone to do all that custom work, and for as cheap of a price. that seems like a bit of work.
do you race road courses?

 

i still cant get the site to work. can anyone give me another link or something.

 

http://www.k2rd.com/index.html is down.
http://www.k2rd.com/catalog.html cannot be found.
http://www.k2rd.com/haltech/E6X.html works, though.

 

lol thanks

 

i'm a daily driver, weekend track racer

 

well if the link worked you would see that these are basicly stock but biger. im pretty sure they fit with 16s to.

 

how do you mean basically stock but bigger? is it like what i'm after? (ie keeping the stock caliper but just moving it out further)

 

You could try changing your master cylinder to a mazda 929. I have one in my house I just have not put it on yet.

 

sorrry i should have worded it better. Its exactly what you want if i reamember correctly. its as big as you can go without changeing wheels size. and you can use stock caliper.

bukwild can you explain why a master cylinder from a mazda 929 is better and from what year 929?

thanks

 

cool i'll check it out if ever the site comes back up

bukwild - there should be no need to upgrade master cylinder since i am keeping the stock calipers

 

i dont think he meant it as a need, but as an upgrade.
"A bigger master cylinder means less pressure, and therefore higher pedal effort.
The other effect of master cylinder size is that a bigger piston pushes more fluid down the lines, so the pedal wont have to move as far to move the calipers the same amount."
-Dave Coleman; Sport Compact Car

 

yep, that's what i understood too, but i'd like to keep the same pedal feel as now - afterall the wifey will drive the car often

 

well, car to car is different as is. changing cars means changing the way brakes feel (and clutches for manuals). my RX7, as long as it ran, felt like it needed its brakes bled (never enough to bother me, though). driving automatics (pretty much what i've driven when driving other's vehicles) has felt completely different. my mom's 4runner and friend's 240 have similar brakes; not much travel, but high pressure. i liked my brakes because i could very easily lightly brake without applying too much torque, so to speak. i'm sure i'd be happy either way as i'd adapt, i just had become used to the way my brakes felt.

 

i dont understand the need for bigger rotors, they are great brakes as is. just get some good pads and slotted rotors, i dont see how having a rotor a few millimeters bigger is going to change much, people use the 4piston brakes for autox and other road races all the time without any problems as long as you have stainless steel braided lines, good pads, and nice rotors. it would be alot easier to take 50lbs out of your car than to make a bigger rotor fit and youd prolly stop better with the weight out than the bigger rotor.

 

First of all there is no point to SS lines. It adds nothing to braking. There are many threads on why slotted rotors don’t help either. But your right the 7s do come with good brakes and can be upgraded by just getting good pads based on your driving style.