Here is an engine some guy built.

http://www.high-performance-engines.com/b18c1.html

This GSR engine produces 275 HP, is bored and/or stoked to 2.1 L, HC (11.5:1) runs on pump gas and is street legal. Remember you can still safely goto 2.2 L from the B18 series. I think it would be reasonable to see 290 HP from the 2.2 L.

Here is a guy's car. He has a spooned-out 2.0 L claimed to 290 HP. What happens if that goes to 2.2L?
http://www.modifiedcars.com/cars/591.htm

Jake