Is 7/8" (22.2mm) biggest master cylinder you can fit on a Daihatsu Cuore?
What are you aiming for ?
Bigger bore shifts more fluid but at lower pressure.
Iām running a stock L60 master and booster 19mm that are fine for two twin spot and a pair of single spot calipers off a vz commodore.
Gets enough braking power to lift the rear before the front breaks if you want too 
Want to get rid of the brake pedal spongyness of my 276
after swapping materia brakes
Its fixed with a Terios J201 bmc
Have you checked any rubber lines for ballooning? Get someone to stomp the brakes and see if any lines inflate. Its one of the causes of sponginess
2 Likes
no bmc was broken not enough building pressure
Will eventually go.braided
A small BMC with a huge caliper will get this spongyness