Go to this website:
Turbo sizing website
Basically, take your CID (146) and multiply that by the rpm (I used 6500), and divide by 3456 and multiply by the volumetric efficiency. Awww shit, just go there and run through the numbers yourself. They have it all spelled out <img src="#/f/iB_html/non-cgi/emoticons/wink.gif" border="0" valign="absmiddle" alt='
'> Nice site. I just found it the other day.
I don't think you should change to a T2 flange. Leave it with the T3. It will work fine, you're just not going to be using it with maximum efficiency. But the good part is that you'll have a T3 flange and if you want to get a BIG turbo later, you're all set. I would like that right now. I'm sticking with a T2 for the time being...upgrading to a T28 BB from an S14 SR in the summer. <img src="#/f/iB_html/non-cgi/emoticons/biggrin.gif" border="0" valign="absmiddle" alt='
'>
Oh, and one more thing. T25 and T28 maps are basically impossible to find. No one will post them. Bastards!
Eric