elwood

iTrader: (1)

That's not an aluminum rotor -- it's an aluminum hat with a cast iron rotor bolted to it, which is what most racecars use. As for aluminum rotors, they do exist, and they do make sense. Lotus experimented with some, and the Prowler used aluminum rear rotors for production. There are also some aftermarket companies that make aluminum performance rotors, but . . .

Those rotors only work well on lightweight cars that don't see high brake temps, and they must be significantly larger than their cast iron counterparts. Even on the rear which doesn't see much brake energy, the Prowler brakes had problems. I don't think most applications or customers have had good luck with them.

mustanghammer

iTrader: (3)

Not to Hijack this thread but I know the cars pictured in the link for Bob Hindson racing. The owner - Aaron Holstrom - earned his SCCA license driving the ITS GSL-SE that you can see is a few of the pictures! Since he runs a porsche shop he has decided to build a 911 for E Production. Looks like a nice car!

Buy the way Aluminum Hat/Iron Rotor brakes as well as improved Aluminum hubs can purchased for for first gen RX7's from KC Raceware - www.kcraceware.com.

The Hub and rotor assy they sell for the front use the 84-85 big spindle and is a direct replacement for the GSL-SE iron hub and rotor. The kit uses OE brackets, calipers, bearings and seals to remain SCCA Production compliant. Charlie Clark and Tom Holstrom engineered these pieces because the factory iron GSL-SE hub/rotors WILL and DO fail in racing conditions. This is no BS, I have seen it with my own eyes. Keep this in mind if you intend on racing or seriously open tracking a GSL-SE car with big sticky racing rubber.

Rotary-MG

iTrader: (1)

Hi again, it's me the infamous old topic thread starter.

One purpose of posting this thread was to get information on what could be CURRENTLY sourced for our RX7s. The above mentioned OLD thread was started in 6/04.

Seems like there are less rotor choices for 84-85 12A FB cars. SA and GSLSE RX7's can at least get Powerslots, so why did the other FB car get left out? (just found out that the ACV for my 12A FB is no longer available, starting to feel like a second class citizen[need to start a new thread topic])

I'm getting the plain rotors, and I'm at peace with my decision. THX !

Other thoughts:
~true - it's the contract patch on the road that stops the car.
~Holes and slots may reduce rotational mass which can help accel/decel (minor at best)
~Holes and slots reduce mass which reduces the amount of available heat sink (ability to absorb heat).
~No one has mentioned that most pads appear to be slotted. So why do we need the rotors to be slotted or drilled?
~If you can still lock up the tires when the brakes are HOT, then think about sticker tires, not bigger/better brakes.

X-Drilling is something that we hate to love? Is it that we are addicted to the BLING that we can't accept it when others tell us it's bad? We still stare at the X-drill rotors just like we stare at Silicone implants! WHY?!?!?!?

side note, you never want the rears to lock up first!
(unless you're drifting)

mar3

iTrader: (8)

longest darn location i ever dun seen under an avatar...grumble, grumble