Joe Z

iTrader: (10)

Well as you already know Lexus utilizes OEM BREMBO for the exiting IS F and a few other current Lexus Performance inspiring cars...

The RC F gets an update in the Braking Department.

The Front gets a larger 6 piston caliper w/2 bridge bolts this time. Which will now bite down on larger 380 mm rotors.. UP from 360 mm on the IS F..

So approx. from 14.2 inches to 15 inches

The Rear also gets a larger, now 4 piston caliper (up from 2), which will still bite down on 345 mm. Same size as IS F. (13.6 inches)

This time around Lexus will still have the one piece ventilated rotors, but they are Not drilled..
They will be curve slotted..

They will also have proper L & R directional part # numbers as well.. (Was not for the IS F)


These pretty much match the specs of the aftermarket Brembo GT kits..
Minus the caliper solid bridge designs and two piece floatting rotors..

Enjoy,

Joe Z
_

rominl

iTrader: (4)

very nice, this is going to be some expensive rotor replacement. but i am more surprised (in a good way) about the rear upgrades to 4 pot

4TehNguyen

iTrader: (1)

the curved slots is the new design of rotors on a lot of cars, without the cracking of drilled rotors. The C7 vette Z51 has these C shaped slots

LexFather

I simply prefer the looks of drilled.

Joe Z

iTrader: (10)

Agreed...

It's a great direction and technology has immensely increased over the last 7 years for Brembo.

The drilled IS F ones will often crack after repetitive abuse on multiple track days..

I'm sure they also implemented their improved Pillar Fin design into these as well.

Not bad at all for an OEM application.

Joe Z

rominl

iTrader: (4)

honestly i personally would prefer just blanks. i have had too many bbk on my cars before with all kind of rotors. for performance, you can't beat blanks.

Joe Z

iTrader: (10)

But that cooling though...

GSteg

iTrader: (15)

Slotted, blank, drilled, isn't it obvious this is the best design?:

Hoovey689

iTrader: (16)

Pac Man !

but really though, 6/4 nice !

rominl

iTrader: (4)

hahah f1 cars need extremely cooling, their rotors are blank

Joe Z

iTrader: (10)

They're also "Carbonio"



~ Joe Z

rominl

iTrader: (4)

look back to f1 history before carbon brakes?

bottom line, the more surface area, the more friction. the more metal (ie no drill no slot), the more heat conducting. there is just no solid proof or evidence that drilled or slotted rotors help on heat dissipation vs performance loss / cracking

but i do admit it looks much cooler and nicer

TimboIS

It's got less to do with heat, than the ability for the gas/pressure to release caused by the friction.

rominl

iTrader: (4)

but again it goes back to real extreme racing, they use plain and i think that's for a reason

we are probably drifting too much away from the topic, sorry about that

TimboIS

But they are NOT using steel rotors, so heat is less if an issue. In every brake pad there is the friction material which is held together with some sort of resin. Once brake pads starts to get too hot, the resin holding the pad material together starts to vaporize, forming a gas. That gas has to have somewhere to go, because it can't stay between the pad and the rotor, so it forms a thin layer between the two trying to escape. The result is very similar to aquaplaning while going too fast in the rain; the pads lose contact with the rotor, thus reducing the amount of friction. Hence the use of slots, cross drilling, etc.

Hopefully, that puts the issue to bed.