All test fitting has been completed, everything fits well. Fits inside stock 15" GSR wheels with minor trimming of one end of the caliper.

Kit includes:
11" 1 piece cadmium plated slotted rotors
Wilwood Superlite IIA 4 piston calipers
cadmium plated mounting brackets
attaching hardware
brake line adapters

Retail price will be $624.95, H-T price $560

You asked for these, so I hope you buy them

 

Hello,

With everyone's new appreciation for reduced rotating mass, what data do you have on disk weights?

Are they all relatively similar? It seems to me that variations +-2.5lbs (rotating) per corner is not noticable in most racing scenarios. Some people have taken this to extremes with their wheel selection. But what lessons can we learn from your expertise on the subject of brakes? I ask this because larger disc diameters provide more leverage to stop the car. But as the size of the disks go up, I am not aware of what happens to the weight of the discs. Do manufacturers reduce the thickness of the disk, because they can compensate for greater stopping abilities by balancing rotating mass?

Do imports typically have thinner discs than domestics to reduce rotating mass? (I've heard the complaint that you can turn domestic discs a number of times, but import discs just don't have the thickness to tolerate this.)

This is one of those questions that should only be seriously considered by people who do race all the time, and need to understand the dynamics of all components in their chariots. I am not one of those people, but I ask anyway.

Unfortunately, I am like many people here, who are incredibly interested in performace principles, but don't have the funds to ever experiment. Maybe I should go to the dark side, domestics are so much less expensive to modify. . . . . naaahh.

Thanks Fastbrakes, someday I hope to be a customer of yours.
wotteg

 

Wotteg,

Most of the time the import cars have thinner discs since the cars are usually lighter in weight and don't requiere as much rotor mass to dissipate the heat.

When larger diameter brakes are installed they can be the the same thickness as the stockers, or thinner, or even thicker. Since the leverage of the larger disc is greater over the rotational mass, the rotor has to do less work to slow the car to the same degree as the smaller rotor. Therefore the rotor can actually be thinner to some degree since it is working less hard. Larger rotors can be lighter if they are designed properly and take into account the weight, etc of the vehicle, but they can't be too much lighter than the stock rotors or they won't be able to dissipate the heat efficiently enough to prevent heat induced fade.
Rotational weights are not as important as removing the unsprung weight of a lighter weight rotor/caliper assembly, at least at the levels of track time most of us have under our belts.

 

For your inside look at brake tech.

I respect the great effort you put into your line of products. Very few companies I see are willing to go to the lengths you do to make sure your customers are satisfied.

wotteg.