A T25 is a good place to start, indeed. But don't discredit the TDO4. They should be fairly easy to find as well (DSM Triplet automatics). A T3 is too big for sure. I have seen one up close and trust me! HUGE. Go for something very small. You need the quick spool-up more than anything else. Any turbo can give you 5-9 psi...but go for a small so it will spool quickly.

Now guys, if I could get some help here. That bit about bleeding off the boost before it gets to the MAP sensor. Can anybody tell me exactly how it's done? I know that check valves from fish-tanks are often used in conjunction with tee's. But I am yet to see a diagram/picture that shows what's really done. Can anybody help out?

 

Kelly those are all good units but the end thing to consider is like you said longevity and ease of maintence. In these cases bigger is not always better

 

Put a beta on it!!
And post pics when you get done
good luck!!

 

I would do a beta transplant. At least with the beta you won't run into turbo problems. Also if you do this and ever change your mind about making more power you have the motor to do this. Check team autosport on 2025 plesis rd, i know the have the beta motor for sale.