Where will I be able to get turbocharger specifications (sizes, trim, A/R, etc.), for brands such as Garrett, Mitsubishi, IHI, etc.? I am having a hard time finding any information about them (greddy.com has NO technical information/support for their own turbochargers; same thing with APEXi and Blitz).

www.horsepowerfreaks.com

it has many of the universal turbos with sizes, trim, A/R, etc

Where are the specs? I can't access the forum because Mozilla 1.7 doesn't support it.

what the heck are you talking about, man??

if you want technical information, ask a serious source (like Turbonetics, who will give it all to you in pdf's) instead of monstro-corps (Garett) or ricer companies.

Try Garrett's aftermarket catalogue :

http://www.turbobygarrett.com/turbobygarrett/images/garrett_inside/Garrett_Cat%207%2017%2013.pdf

I've asked turbonetics before. You're right, they were helpful :).