SR20DET Fuel injector/Tuning question

[gdbyyosh1to]

I've already searched for this topic and found nothing that applies to my situation.

I purchased some Deatch 550cc injectors that were on sale a while ago and was wondering if it's okay to install these injectors in place of the factory ones without a tune.

I would be installing them directly before driving it to get it tuned. Would this be okay or would i just be sabotaging my engine?

Also... does anyone have experience with Jim Wolf ECUs? Would i be better off getting one of these rather than taking my car to the dyno? I don't have the money yet to go for a standalone unit.

Thanks!