sorry to be a noob guys , I have basic understanding of fuel systems , but I wanted to learn some more about injectors in our cars , sizes, what works , what doesnt.. which to use where and when , that kinda thing

I have righgt now 550 's and 680's as secondaries.. I get mixed views on 680's , but they were there when I bought the car , so

lol if anyone could give me some info or point me in the right direction to find some ,I'd be grateful
thanks

 

http://www.rotaryresurrection.com/2n...ctor_info.html

 

awesome thanks ,
what is recommended for injector upgrade next? if I get 720's ? should I put the 680's as primaries , or just ditch them..?