Considering the amount of hp you are putting to the wheels I wouldn't think that any kind of fuel or ignition system upgrade would be beneficial. Your stock rail should flow fine at normal fuel pressure (39~42 psi). Your injectors should be somewhere around 240cc's and should be good to about 200hp without boost (of course by then they will probably be close to 100% duty cycle). Your fuel pump will be fine unless you are running other then stock fuel pressure. Even with boost your fuel system wont need much until you start hitting the 250whp range. At that point injectors and some form of fuel management should be about all that you need if your running low boost (low being 5~10psi). As far as needing more spark, same thing applies. You wont need to do more then use quality plugs and wires until you hit about 300hp or start revving past ~8900rpm, at which point a Capacitive Discharge Ignition might be useful. Look at the Intgra Type R. It uses basically the same setup for fuel and ignition as a GSR (and possibly a LS) and its pushing 190~200hp and revving really high. Just my $.02. I know that doesn't help you with your current problem, but my point is that your money would be better spent on other upgrades before you attack your fuel or ignition system.