Z31 300ZX rear calipers?

[280Z Turbo]

Everybody knows about the 280ZX, Maxima, and 240SX rear caliper swaps, but I was wondering if it was possible to do a 300ZX rear caliper swap.

 

I think I could get Z31 rear calipers much easier than 240SX calipers and I'm wondering why nobody has mentioned this before.

[510six]

I use 85 Z31 rear calipers for the braking setup on the 510, 280zx rear rotors were used to clear the 13" wheels. The calipers and pads are about 25% larger than the 280zx units, so a Wilwood proportioning valve was used to get the braking bias spot on. I am not sure about fittment to a z car, but the E brake mechanism was eaiser to route in a 510, just be aware that a different bracket than used for a 280zx caliper will have to be fabricated.

[zcarnut]

This topic has been mentioned before. I will paraphrase my past responses:

 

The 1985-6 Z31 rear calipers are designed to be used with a larger diameter rotor than the more popular late 280ZX rear rotor swap. Although the Z31 rear calipers have the same bolt spacing as the late 280ZX and 240SX calipers (and will bolt up to the exiguous Maxima caliper bracket), the pads will not be in the correct location regardless of whether the 280ZX rotor or the Z31 rotor is used. Furthermore the 1987 and up Z31 rear caliper has a wider rotor slot opening because of the vented rotor.

 

The other problem with trying to use the Z31 rear calipers on an early Z car is the parking brake operation. On a Z31 the direction of pull of the parking brake lever on the caliper is to the front of the car. When the right and left side calipers are reversed (i.e., left caliper is used on the right side and vice versa) so they can be used on a 1970-78 Z car, the direction of pull of the parking brake lever on the caliper is now to the rear of the car.

 

This is difficult to make operational. The parking brake cables have to be custom made and routed so they pass under the fuel tank and curve back to the caliper avoiding the strut tubes and the exhaust pipes. I spent some time trying to make this work but I eventually gave up.