I have checked out several good Ford Racing & parts supplier resources and still not 100% on which injector size I require. When spraying nitrous is the setup still consider naturally aspirated? So for example N/A 400 crank HP and with a 200 shot 550-600 crank hp. When deciding which injector to use there usually is a FI & N/A rating. I'm assuming the max 85% N/A rating is the one to use?? Here is a link to a very good Ford Racing Air/Fuel tech guide
https://www.fordracingparts.com/down...I_TechTips.pdf
According to what I read 47lbs injectors should do the trick as long as using nitrous is still consider N/A. I have also heard going with an oversized injector can be overkill dumping extra fuel into the motor and tuning can only compensate for a percentage. Any thoughts?