Fuel Injector selection, comparison, researching, selection... confused.

[bovey]

I'm trying to understand fuel injector selection.

Due to how I use my truck, I like to have back-up parts. The one thing I have not done is have some back-up stuff for my EFI.

My combo is fairly straight forward, a 427 LSX, AFR heads, Victor Jr intake, Edelbrock runners, 1200 CFT Throttle body, Edelbrock fuel rails. All out of the box. The engine is controlled by a BigStuff3. Everything works great, or at least I think it does. Next week I'm dynoing the truck, finally. And I'm researching my fuel system components at the request of the tuner.

Side note: I had the engine build by a reputable builder, sadly something has happened and the shop is not as reliable as it once was or as helpful.



Diving in, I figured this wouldn't be hard, hell, there is a part number on them. Easy? Nope. 17113813 - A Racetronix part number that is no longer available. There seems to be nothing wrong with my current injectors, but I'd like to be ready.


So, here is what I don't understand, or after some significant time researching seem to be able to find a set that seems close.

What do you look for when selecting an injector? What specs need to match? Buying a matched set seems smart... again, I run a fairly common stuff, but I'd like to understand how to figure this out without just running what someone else does.

Any advice would be hugely appreciated, or even a place to start. I assume not all 42lb injectors are created equally.

Thank you in advance.