Do I have to upgrade the mc with my new front calipers?
 

Probably a quick question for Bill, and I did do a search but can not find the correct answer to this one!

I have upgraded to 944T front calipers on my SC and retained the normal SC rear calipers for now. But I am unsure as to if the stock m/c on the SC is adequate for this set-up or if it needs to be replaced for a larger one, or do I need a biasing valve in the system?

Thank you for your help and advice...

You have several problems
1) the caliper is too big for the rotor(I'm assuming you have a Carrera 24x282mm rotor), you need at least a 28x298mm rotor)

2)you have way too much front bias, you need either wide Carrera rear calipers or 964 rear calipers.

3)m/c will need to be changed after the above is rectified