Both FI and higher compression increase your hp but they also increase the probability of detonation - a real engine killer. The only answer for that is good engine tuning and high octane gasoline.
It seems that the stock H22A can take up to around 6 (maybe 8) psi with just good tuning on 92 octane pump gas. If you want to raise the compression by 10% (say from 10 to 11) you'll get around a 6-8% hp boost, but you'll need about 10% more octane (101!) to keep from detonating.
This is probably not the way to go. It turns out to be more efficient to raise the boost level to get the power you want; and, in turn, lower the compression to keep away from detonation. You could always have an overdrive pulley custom fabricated, and JR might be willing to port their SC for more efficiency. One drawback of the SC is that the efficiency island is fairly small; at a certain speed, it stops pumping more air and just generates heat. You just can not push 15psi with the JRSC.
Note: if you do want to run close to the ragged edge of detonation, there are products to help you keep your engine from blowing such as the J&S safeguard:
http://www.safeguard.20m.com/ But it's a touchy business, and I wouldn't recommend that strategy for a street car.
