a T04/03 won't require any more fuel than a S-16G if they're running at the same PSI. at any given rpm, if the boost is the same they are pushing the SAME amount of air. boost thresh-hold, lag and high-rpm boost capability are the only things that change with turbo size. the AMOUNT of air that they push is determined by the PSI and your engine's displacement. so a fuel pressure/injector size that works with one turbo will work with another for the same boost level.