RX7M5GUY

iTrader: (2)

This could have gone into the Wheel /Tire/Brake section, but the autocrossers seem to hang out here and will better understand my inquiry.

SCCA Street Prepared rules let you reduce weight in your brake system by using rotors with aluminum hats, but not of smaller than stock rotor diameter. For a dedicated autocross car, the extra weight of a big brake kit is a disadvantage and is not needed as the typical autocross run only has about 15 seconds of hard braking.

So can anyone direct me to a stock size lightwieght rotor?

Thanks, Philip

allbee

For what? Fb Fc? If its an fb KC raceware has aluminum hub rotors.

RX7M5GUY

iTrader: (2)

Sorry, left out essential info. Its for an FD, Front and Rear

D.R.

Give AWR (Anthony Woodford) a call. He makes a stock sized two piece rotor kit for the FC and has always been receptive when I have asked him to do custom work.

doctorzaius

Why would it make any difference?

Brigdh

iTrader: (9)

Brake rotors are a part of unsprung weight, and typically reducing a pound of unsprung weight is equal to 2-10 lbs of sprung weight(depending on who you ask/how you look at it)

AMRX7

I got the Racing Brake front rotors which save a couple pound each over stock. Don't know any off the shelf stuff that is significantly lighter.

-Andy M.

GoodfellaFD3S

iTrader: (213)

I just searched around the RB site, and they don't list the oem sized rotors for the FD any more..... weird.

RX7M5GUY

iTrader: (2)

Thanks guys for the continuing commentary. I checked RB's site first based on the BB threads and didn't go any further with them when it didn't show anything in the stock size.
If Andy got them there at one time, maybe they still have the capability to make a set.

Philip

AMRX7

Well, mine have been fine but I know some other folks had some issues with them failing/cracking. It may be they pulled the application for that or low demand. I've been pretty happy with them, though. Work fine and seem to be fairly resistant to the high wear I typically get with lots of cold/lower temp stops in autox use.

-Andy M.