Jordo487

Just wondering what suggestions people have for brakes? My brakes need a changing here pretty soon and I am just thinking of putting something nicer on since I have to take them apart anyways. Not looking for anything crazy in price, but would like something a little better for performance and style then the OEM brake setup. Also are cross drilled or slotted rotors better?

Kurtz

iTrader: (1)

Unless you run the car on a track any "upgraded" brakes will provide exactly the same performance as the stock ones.

The brakes don't stop the car, the tires do. If you want shorter stopping distance you need better tires, not bigger brakes.


The only thing drilled rotors will do for you (besides "look cool") is eat through pads faster and be prone to cracking around the holes.

The only thing slotted ones will do is eat through pads faster (they avoid the stress riser cracks of drilled at least).


Now- if you do track the car, slotted can offer some advantages as far as deglazing of pads... and larger rotors can offer some thermal management advantages... but none of this is relevant to normal street driving.

Jordo609

Thanks for the good information! Much appreciated!

pepos

// SPECIFICATIONS
// BRAKE UPGRADE (PG 5)
Rotors, All Models (Disc Size) Front Rear
Front (Diameter x Thickness) 355mm x 32mm 345mm x 28mm
Calipers Front Rear
Design, All Models Six-piston opposed, 2 piece fixed; Four-piston opposed, fixed;
bolt-in bridge bolt-in bridge
IS250 IS350 IS250C IS350C GS
Piston Diameters - Front (mm) 30/30/34 34/34/36 30/30/34 34/34/36 34/34/36
Piston Diameters - Rear (mm) 28/28 30/30 28/30 30/30 28/30
60-0 mph 60-0 mph
Distance (Best) Distance (Average)
IS250 (Stock) 119.2 ft 122.8 ft
IS250 (F-Sport) 108.8 ft 110.8 ft

Lexus thinks differently on improving stopping distance!!!!!!!!!

chikoo

I have used Akebono ceramic for some years now and very happy with it.

Kurtz

iTrader: (1)

Lexus is wrong then.

Unless Lexus has found some way to defy fairly basic laws of physics.

More likely the "F-sport" numbers include changing the wheels to F-sport wheels, with drastically better tires.

THAT can improve stopping distance, since the tires, not the brakes, are what actually stop the car.

If you'd like a brake engineer who has literally written books on this topic to explain the math and science behind this, great reading here:

http://www.scirocco.org/faq/brakes/p...n/pfpage1.html


(Note: the -average- distance could be improved... because that could be a test of distance stopping 50 times in a row without ever letting the brakes cool... something that would never happen in real life. In that case distance would get longer sooner with the stock brakes. But it'd never, ever, get shorter with "better" brakes than it did on stock brakes the first time.)

Anyone who tells you changing your brakes can shorten your normal stopping distance is a liar trying to sell you a brake upgrade.

Honest vendors... Brembo for example, will tell you the same thing I am-