Brakes

The standard 323 brakes would never stand up to the increased power and stopping demands that the rest up the car is undergoing. I have a friend who has been through about 4 gts-t Skylines and got the disks and 4-pot calipers for a song (free!) from him. I also had an old Toyota Trueno front end lying around. The hubs on these are very similar to the 323 ones with the exception that the disks are bolt on for the Toyota ones and solid hub and disk for the Mazda ones. You can machine the disk off - but it was easier to just machine the Toyota ones slightly to fit the 323 hub axle.


I then also machined the outside of the hub so that the disks fit over them. They are then just floating disks - secured when the wheel gets fastened.
The next job was mounting the calipers. For this I had to mount the disks, then clamped the calipers in place on the disk and made up a mock mount to get the correct spacing measurements. The mount has been milled out of a sold 20mm thick x 100mm wide bar. They bolt on to the old caliper mount points and then onto the new 4 pots.



The final part to the brakes was upgrading the master cylinder. I went as big as I could find - a 1” bore master cylinder from a Hi-ace van. They’re about as big as you’re going to find. A made up a custom adapter plate to fit the master cylinder to the brake booster. The master cylinder is also mounter upside down (the only way I could get room for the fluid outlets).



The rear brakes are standard R31 disks and calipers.