Well I just started researching injectors and I can't seem to find to much about them. I know the two main ones are saturated and peak and hold. Which of these two need a resistor box? I've been looking into RC injectors and I have someone offering me 440cc's for $70 a piece brand new(good price??) which i plan on using to run 7psi at first with Apexi S-AFC. Ive heard that you can't lean out the fuel as well with bigger injectors and a piggyback. Is this true for 440cc's? What hp do 440's top out at? What are the pros and cons of both kinds of injectors? Lastly what are clips? Are there a difference between OBDI and OBDII injectors? Sorry if this has been asked a million times.

Thanks for all the info
Stewart