Using piston and pad data for AP racing 5000 series calipers
Medium for 315 to 330mm discs
Small for 280 to 295mm discs

6:1 Pedal ratio 5/8" master cylinders front and rear
No servos
Standard Brakes are 	Front Granada 262mm vented discs Pad area approx 7.6in^2
				Rear	Granada 253mm solid discs Pad area approx 4.5in^2

Weight 1000kg weight distribution F/R=43/57 cg height 15"
under braking this results in F/R=57.4/42.6

Imperial
			Balance	Pedal	Pad dis F	Pad dis R	Press F	Press R
			 F/R		(lbf)	(hp/in^2)	(hp/in^2)	(psi)		(psi)
Standard		55/45		83.3	12.0		17.0		888		742
Small/295		56/44		47.1	13.6		10.1		513		409
Med/315		56/44		41.1	10.2		7.6		447		356
Med315/Small295	52/48		43.8	10.2		10.1		447		409
Med/295/Small/295	55/45		45.6	10.2		10.1		483		409

Metric
			Balance	Pedal	Pad dis F	Pad dis R	Press F	Press R
			 F/R		(kgf)	(W/mm^2)	(W/mm^2)	(bar)		(bar)
Standard		55/45		37.8	13.9		17.4		61.2		51.1
Small/295		56/44		21.4	15.7		11.7		35.4		28.2
Med/315		56/44		18.6	11.8		8.8		30.8		24.6
Med315/Small295	52/48		19.9	11.8		11.7		30.8		28.2
Med/295/Small/295	55/45		20.7	11.8		11.7		33.3		28.2