So MBHD, by making the A/Rs small but keeping the trim decently sized, you can get quick boost and good CFM. That's what I've gathered from those specs.

So my choices appear to be...
http://cgi.ebay.com/ebaymotors/T3-Super-...=item53e53e0404
Super60 compressors which is a nice size (I think). Has lower A/Rs, 0.76 trim on the compressor, and 0.88 trim on the turbine.


http://cgi.ebay.com/ebaymotors/T3-SUPER-...#ht_3410wt_1167
Super60 compressors which is a nice size (I think). Has higher A/Rs, 0.76 trim on the compressor, and 0.86 trim on the turbine.

So wouldn't getting the high A/R give me room to improve once I switch to the high PSI setup and only give me boost when I really get into it?
And would the low A/R hinder me when I switch to the high PSI setup but give me more power at more common RPMs?
Which would you guys reccommend because I REALLY need to buy one.

69 Buick Special Deluxe. Intercooled Turbo Chevy 250 @ 15psi on a stock long block. It's kinda fast.