Using the T25 will not be my final solution but it could get me started seeing as I already have the turbo which has had the wastegate ported etc and works pretty well. The GT2554 has a 54 mm wheel with a .64A/R. It's a little small but I'm pretty sure it'll handle 5-8 lbs no problem but after that it'll make too much heat and be beyond it's maximum effciency on the compressor map.One thing that I've found with the smaller turbos is they spool instantly. So I guess in answer to my question get the T3 manifold not the T4. I looked on the Turbonetics site and they don't really list their specs that I can see. My experience is with Garrett so I am more familiar with their product line.
M5
