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im just saying i would not use an expensive turbo or one with with a tiny turbine. Don't buy a used turbo either. There are some good quality inexpensive units out there.
T-25 is too small for my climate (80*F~). The type of turbine is based on ambient conditions and vehicle use. Daily drivers started in very cold climates enjoy very small turbines when total flow rate is on the low side, its good for super cold weather and on-off on-off mountain pass stuff probably near stock turbo flow rate (320bhp or 32lb/min and roughly 280rwhp dynojet). But its just too hot here, on gasoline, and we do way too much highway racing and constant pull type WOT racing, 1/2 mile and 1 mile applications are different thinking. You don't want the exhaust gas pressure of a T-25 hole, when the egt gets high, exhaust gas molecules gain so much energy they create too much space around them, the pressure goes way up which chokes the flow rate dramatically. The exhaust pressure is far more important to engine flow rate than the head in a turbo app and you the balance of getting it warm enough fast enough to be driving right away (T-25 daily driver original size turbo in freezing weather with 95 octane pump) against the on-set of heat soaked, peak steady state temps with 93 octane in hot climates, the turbine is way too small for us and our 93, and most unfortunately don't do much about the heating. Insulation helps with performance but packs even more heat into the turbine. Disregard all of this if you live in a freezing climate and need to drive and boost the car within minutes of starting it on city streets, the 28whatever is a great selection worth every penny.
It's a double edged sword and when the turbine is tiny the price is paid in... blood... engine blood
in general just realize that,
small high quality water cooled bb bottom mount turbo is just as expensive as a similar quality top mount turbo with a larger turbine, spend the 2k or 3k on that instead if spending that much, but then you better take great care of the engine and tune it properly and know what you are doing. Otherwise it won't matter what turbo you choose, the parts will falll out
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