If you are intending to use brake calipers from another make or larger vehicle that has 4 or more pistons it is not just simply a matter of cobbling up a dog bone adapter to mount them onto the factory or larger discs to replace the factory single piston sliding calipers expecting that all will be ok it is vitally important that the total volume of fluid used when the brakes are applied be equal to the amount used in the donor cars MC when the brakes are applied otherwise the pedal feel and stroke will be different and the pedal will almost certainly go closer to the floor before the brakes work.
To get the pedal engagement at the same height as factory may require over boring the factory brake master cylinder to increase its volume to match the donor vehicle's master cylinder OR replacing it with a larger unit to get the fluid volume displacement correct.
Or just buy a correctly matched BBK from an aftermarket supplier as I did for my "new "car.
FYI my old car had the master cylinder overbored and fitted with a matching piston when it had Nissan 4 pot calipers fitted to my Mitsubishi by a brake specialist many years ago.
To get the pedal engagement at the same height as factory may require over boring the factory brake master cylinder to increase its volume to match the donor vehicle's master cylinder OR replacing it with a larger unit to get the fluid volume displacement correct.
Or just buy a correctly matched BBK from an aftermarket supplier as I did for my "new "car.
FYI my old car had the master cylinder overbored and fitted with a matching piston when it had Nissan 4 pot calipers fitted to my Mitsubishi by a brake specialist many years ago.
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