Street Setup
 

Running E85, shooting for 350-380. Will 550/1300 be sufficient or 1300x4?

Just get 4 ID 1700's and call it a day it will cover your to 500rwhp because you will always want more later anyways and from what I've seen they are very controllable and shouldn't hurt your idle.

I'm trying to run gasoline most of the time, I'll probably run e85 3-4 times a month. I saw on the ID website 1300's run gas perfect but the 17 and 20 start getting wonky.