i have a 5.3l lm7. i have stock internals with around a 9.5:1 cr. i have a A1000 fuel pump and regulator with aeromotive ls1 rails. the turbo i have is a garrett gt4082. i want a mild set up(like 400-450hp) for now. ill be running only around 5-6 psi. i was thinking of runninf 40# injectors but iv been told they wont flow enough fuel. like i said i dont wont huge power right now (because of stock internals). what injectors are you guys running? the car is still in pieces but im trying to plan ahead.

 

5-6psi on 5.3? 44#'s will be fine IMO.

 

i should know better than to ask this but how bad does this effect your fuel econmy?

 

Fuel economy is directly related to how the car is driven. For normal driving, it will remain pretty much the same, maybe a tad better.

 

wow thats good to know!

 

I have a set of Delphi 42# in the box if you are interested pm me

 

44# inj's is what you should run. I'm running 44# inj at 6 psi on my stock LM7 and making a little more HP than your looking for and I'm doing fine with fuel pressure.

 

Driving style will effect your MPG, but...I was seeing 21+mpg before my set up and after my set up w/ injectors I'm seeing around 15 mpg. Obviously my driving habits have varied a great deal because of led foot but I wouldn't expect less than 2 mpg drop. But that's just me.