Hallo,
As I am using a 2.5 16v head with the 2.3 16v
block [80.2 short stroke]  then as I am running
longer rods, 150mm,11.5.1 compression pistons
at 96.00mm  and the 
'top' land is closer to the piston deck,
piston cooling is required.
Went with the BMW E36 M3 Evo Oil squirters
fitted into the 16v block 'main Oil Galley;.
These Oil Squirters only really start to work at
around 2- 2.5 bar, so by increasing the oil
relief valve pressure up to 5 bar, it should
mean that at below 1500 rpm, the engine 
will make around 1.5-1.7 bar oil pressure 
and increase all the way to 3.5/4.0 bar at 
6500 rpm and over.
http://yfrog.com/nddsc03186kjhttp://yfrog.com/nddsc03185njhttp://yfrog.com/j2p1010059fjhttp://yfrog.com/j2p1010058pejRegards,
Gorilla.