Z/ZX rear brake swap, guru input wanted

[Dan Baldwin]

My plan is to install '82-'83 rear disks and calipers on my '71. I'd like to do my best to get the same brake proportioning as stock. I have some technical questions regarding brake proportioning.

 

I would like to achieve (for now) stock ZX brake proportioning.

 

To this end, I will try to remove all hydraulic devices affecting line pressure between the master cylinder and the rear wheel cylinders from the Z system, and replace them (along with the master) with any hydraulic devices affecting line pressure from the ZX system.

 

What I would like to know is:

What are these devices on both systems and where are they located?

 

Also, does anyone know the piston areas and caliper working radius (approximately the radial distance from the wheel centerline to the caliper piston centerline) for the Z and ZX offhand?

 

Thanks,

[Owen]

We were talking about this in one of my threads, but it seems that the stock prop valve is located in different places depending on the year of the early Z. My 73 has it on the firewall, near the tunnel on the drivers side.

 

Does anyone know...if it is illegal (track wise) or unsafe to route the brake lines thru the interior of the car?

 

Owen

[Guest scca]

it is generally recommended to run the brake lines inside the car from front to rear it also makes it easier to install a prop valve inline when the line is beside you as well. i dont know of any rules that prohibit it..

[Owen]

Thanks Mike,

Will start that this weekend!

Owen