If you want to do any new brake system design correctly, you have to do some math... This is the spreadsheet I made to help with that (click the picture above). Feel free to use it for your own project, but keep in mind I make no promises that it is correct and if you crash in a hellish ball of flames, you should have checked my math!
Tilton pedal assembly mounted in the cockpit.
Here are my front brakes... I recently installed the Wilwood Dynalite Calipers on the fronts after the 18 year old JFZ's began leaking. The rotors are modified 12" vented units that can be had from any circle track parts house... These came from Speedway Motors.
Rear view showing the aluminum caliper mounting bracket.
If you are paying close attention, you may notice the rotors are installed backwards on the hat... The hat is mounted inside the center vent intake. This is how the brakes were designed by the previous owner. It works fine on an autocross car, but not recommended on a road racer.Here is a backside view showing how the hat is nested inside the rotor. Because of this I had to machine the inside of the mounting tabs on the rotor to make them flat.
To make the hat section work with the stock Z hub and retain the proper track width, the mounting surface on the backside of the hub was cut down about 1/4"
Here is the bracket I designed to mount the Dynalite Single rear calipers to work with the 83 ZX rear rotors. Click on the drawing to read all of the dimensions.
One bracket in place.
Completed assembly. Note these calipers do not support an emergency brake... you could use a line lock if you really need one.