MrHeeltoe

iTrader: (1)

Need this measurement in mm. We have some parts in the works.

black label

2010 model....
12.6" ventilated front
13.2" solid rear

It's the same on front track and SHAWD.

Now get to work and build us something

edit, just realized you asked for it in metric, hmmm, would you trust a conversion table or do want a from the factory spec in mm?

black label

Take 2:

Front Brake Rotors 12.6 in (320 mm) diameter ventilated rotor; 1.1 in (28 mm)
rotor thickness; functional front mounted cooling ducts

Rear Brake Rotors 13.1 in (334 mm) diameter solid disc; 0.43 in (11 mm) rotor thickness

http://www.hondanews.com/categories/733/releases/5192

Scotten

Okay, why is the rear larger (diameter and thickness) than the fronts? I've never seen that on (m)any cars, and likely only rear engine Porsche 911's.

black label

I don't have a good answer for that one. Typically your front brakes provide about 80% of your stopping power. Even on a rear or mid engine Porsche the front rotors are typically larger than the rears.

KeithL

Maybe becasue theyre solid and don't dissapate the heat as well

George Knighton

It's not very well publicised, but the 4G TL has a more or less "active" anti-nose dive system that helps the car to make better use of the braking force on the rear, so you need rotors and calipers big enough to make such use of the braking force.

You don't really need the rears to be ventilated, because even though they're going to be taking more heat than regular cars, they're not going to be taking as much heat as the front rotors, and won't really need to be ventilated to dissipate heat...and even if you wanted to go to vented rotors you'd have a hard time directing air to them properly.

Especially with the 6-6 version of the car when it is being used in high performance applications, you really want enough braking force on the rear to keep the nose up and control the car's attitude when trail braking and other high performance use.

I don't know if you guys have noticed or not, but the 6-6 stops amazingly well for a two-tonne car, even in repeated applications on the track.

And turning off VSA does exactly what you'd expect and what you'd want it to do. :-)

George Knighton

Also, for whatever it is worth, we basically totally de-bunked the theories about the uselessness of the rear brakes in Honda Challenge.

People learned very quickly that the rear brakes are very, very important.

Scotten

When I tracked my S2000 (yes, I miss it), I went through (stock) rear pads much quicker than front, but that's not uncommon. I'm pretty sure they went for small and quiet pads which are fine for the street but not repeated hard braking.

MrHeeltoe

iTrader: (1)

Larger diameter brakes produce more brake torque. It increases the braking without changing the pad size or caliper.


I need to know if the front pads actually rub all the way to the extreme OD of the front rotor. The "OD of the friction circle" is probably the best way to say it.