ah right... cool.
my mate has a pulsar gtir and is busy rebuilding his SR20DET engine because he was running a gt3071 @ 1.2 bar making around 270bhp@wheels and he melted a piston on the rollers

its now getting steel rods and forged pistons
the standard engines are great up to around 300bhp then it all goes into dodgy territory... it may run fine for ages...it may not... try it at your own risk
his step by step rebuild thread is here if anyone's interested
http://www.gtiroc.com/forums/showthread.php?t=45633