Ok, so here I'm wondering what if anything could be done to upgrade my turbo. Sure I want twins but simply can't afford it right now.

So, I want to start a link to educate everyone here.
Kinds of turbos, compressors, housings, wastegates and so on.

Questions from me are like this:
1. Increase the OEM housing and get more air and lower EGT's?
2. Increase the overall size of the single and when do you begin to suffer lag?
3. Singles vs. Twins?
4. Gated vs. Not?

I think you can see where I'm going. Let 'r' Rip:

 

So, I guess there are few of us (including me) that really understand the differences. If BD Dave is kicking around perhaps a little lesson for everyone's benefit is in order?

Dave can you edu-micate us a bit?

 

Yes please do, I'm very interested. New to the turbo world and trying to learn all I can.