Wow, it's like you broke every rule in the book. Upgraded ebay turbo, no fuel pump or IC, NO TUNE and thinking of upgrading your clutch. No safe
horsepower can be derived from that setup. Do you hate your car?
I'm not trying to be a jerk, but you have to do SOME research before you start throwing crap on your car man. You're lucky it was that pos turbo and not your engine.
1. Your ebay turbo lasted a few days? Shocking, I'm surprised it lasted that long
2. You always tune for every mod. You would have been better off with an accessport and stock parts
3. Stock tranny? Stock clutch!
To get an idea of how different your car is from a Honda Civic, read this:
_THE_ WRX Modification Guide *Complete*
It's by no means the Subaru Bible, I found a couple mistakes re-reading (turbo timers, clutch's), but it's a start.