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For a 91 Ej22t...whats the best?

A quick search would yield that none of us have quite figured out what the best option is going to be.

In theory, if there were options, I would say the best choice would be one that you could compensate for with some form of engine management. EMS first, big injectors and rails second.

Though some Nissan injectors are looking quite promising.

There is no single best. Too big and you'll run rich. Too small and you'll run lean. It depends on your particular application.