P2 S60 engine variants

[nahrifa]

Hi. Good day

About :

year 2006 - S60 R
year 2006 - S60-T5-2.4- 260 bhp
year 2003 - S60- T5- 2.3- 250 bhp

what are the size of con rods and pistons for above cars ?

between T5-2.3 and T5 2.4 , what are engine internal differences ?

for T5-2.3 and T5-2.4, what is the best turbo to use (with ecu remap )...? KKK-K24 or 18T or 19T or 20T ?

target power 300 bhp on T5

What are known and usual weak problems with above engines ?

Thanks