chris
ive actully got a tuned 1.6 16v, running around the 150bhp mark at the moment
as chip says, heaviley restricted in standard from by the inlet, but with a replacement inlet gains of around 20-25bhp can be seen
with the 1.6 (c16xe 109bhp without egr crap in earlier GSI's, and X16XE 106bhp in later sports) you also have the option of tb's, broster who works from jamsports got one running at around 190bhp