There aren`t any options other than OEM injectors for our cars. If you`re going to make the most of the setup you have planned you`ll need either 5th/6th port injection (an auxiliary system that adds one or two injectors, usually before the throttle body), full on port injection (having an intake manifold with provisions for direct port fuel injectors and a fuel rail), or a decent methanol system (typically the simplest route). They all have their pros and cons, but the fact remains that the OEM injectors simply do not flow enough fuel to squeeze more than about 370whp out (not safely, anyway. I have heard tales of turning injector duty cycles up well over 100% but I shouldn`t have to speculate what risks that entails).
A properly tuned port injection system is probably the most "permanent" way to do it, but by far the most expensive.
Methanol injection is very popular, and it`s plenty effective, but it has it`s drawbacks. Not the least of which having to find somewhere to buy your methanol and having to make sure your methanol tank stays full (oh yeah, you`ll need a tank for your methanol). Methanol does a fantastic job of keeping your intake charge cool, particularly important if you live in a hot location.
5th/6th port is a great middle ground between the two. You`re not forced to spend a thousand dollars on a manifold PLUS the hardware for the injection system.
I am running a methanol system now, and it does it`s job (was turning just over 400whp and it was a perfectly safe tune). There is a very, very high likelihood that I will be doing a 5th port setup on my new build (running one extra injector in a fitting made to go inline with the intercooler cold piping) and cutting back on the methanol.
If you want a "set it and forget it but keep it affordable" set up, 5th/6th port is definitely my suggestion. With a 5th port you probably won`t even need a bigger in-tank fuel pump for a solid and reliable 400whp build.
