1500 fnt discs & 944 rear discs

[bug-er]

hey Shad cheers for all the help
got a few more questions for you if you dont mind
-what is the optimum in terms of braking bias ratio???
-theres a guy i found running the following setup
a second hand (23mm/19mm) 944 master cylinder,
At the front: VW T1 calipers - 40mm diameter
At the back: Sierra calipers - 43mm diameter
I'll be running the master cylinder 'backwards' with the 23mm section running the rear calipers.
now ive had a go at the maths and ive got a ratio of 1.26:1
back 43mm dia/23 mc (43/23)^2 = 3.495
front 40mm dia/19 mc (40/19)^2 = 4.432
therefore 4.432/3.495 = 1.26:1
he reports that this setup is really good with no problems at all and he well chuffed with the results
Is i try the same setup i get a ratio of 1.91:1
i dont know the optimum ratio so i could really know what is the best to get as im a little confused
cheers
Adam