Exactly, you MUST have at LEAST an s-afc to dial back the injector pulse width so it will idle. I just installed a set of 1000cc injectors last night and I had to lower my fuel pressure to around 35psi at idle and use MSnS to cut back on the pulse width to get around a 13.3:1 idle and my VE buckets in MS is around 10 or so. So as already stated you MUST have some way to control those big injectors and honestly I don't think you can do that big of an injector on an S-AFC, I think you would still be rich even after lowering fuel pressure.