As long your running a decent quality nozzle it will atomize just fine.

Your probably best off buying a complete kit, and letting a shop install it. They will also gradually do bigger shots until they either hit the max you want, or it stretches the limit of safety.

Thats what i did when i had my Si. I ran a 35 shot and got 50whp/50tqe from it. no timing retards and i had safe AFRs