The last answer gave a good answer but you should check out this website for more info:
http://www.toysport.com/Technical%20...tech_notes.htm
It will tell you everything you need to know about the 22RE from a performance standard. Did you know that Toyota actually made a turbochargeed version of this engine called the 22RTE? It was used on a select number of Toyota trucks from 1985-1987. I would use there stats as a starting point. The factory built engines had stronger internals and more to handle the turbo's power. The 22RTEs have been known to put out over 200 hp. You'll need to build your engine for turboing anyway so why not build it as close to the 22RTE's factory specs as possible?