Oh dear! So much for that pushing that lil' ko3s to its limits. 
So fitting a K04-023 to the car would not have caused this issue and its because the k03s is maxed out.... Just show how much you really know about engines, turbos and tuning....PMSL

I am sure if it was maxing the K03s out then I would have many unhappy customers.
I think your problem is that your on a very bias forum, and your reading what the site owners/sponsors want you to read.
Funny how all my post got took off CGTI and all my K03s - k04-001 1/4 mile sprint times and 2011 show awards got deleted by the site owner?
Back to topic
I was running upto 400lbft of torque on my stock shells, and with just the k04-023 with out nos all day long at 335lbft at 3200rpm only runing 5w40 Platinum oil.
Befor you put the sump/head back on I would check the oil galleries and blow them out.
Nick