Yes, for N/A upping the fuel pressure should do. Just tune the results with a SAFC or something similar. Most N/A SR20 engines with bolt-ons and even S5 cams and such like around 52 psi of fuel pressure or more. Max 60psi or around 4 bar.
Maybe something radical like high compression pistons (aftermarket forged or SR16VE), bored out and/or stroked engines would need a bigger injector, in which case perhaps the VE 333cc gray connector will do.