wow thats a big cam.....well to me anyway haha! The injector size will not really effect economy. If you take a 42# injector and push it to 95% idc, and then swap to a 60# injector to run at 83% idc they both are using the same ammount of fuel to create an optimum A/F ratio......then you have saved yourself some grief and also the injectors (from what i understand) are at peak performance between 85-90% idc. Any thing over that and the pulse width and modulation aren't as accurate.

Then again its just that factor of room to grow I guess.....

 

The smaller the injector the better the resolution(atomization) the fuel has. The bigger the injector the bigger the plunger in it. Not that I think you will see any difference in this app, 60#ers run good too. I didnt see any difference in mileage between 44s and 60s. The low impedance and high z 80s seem to have efficiency problems.

 

so why would you run a smaller injector?

 

Nice talking with you the other day. I would leave the stall alone.

There has been some write ups in the past at what point you need an IC. 7 psi is questionable needing or not. Depending on what is going on. Meaning is 7 psi intercooled the same HP as 5 psi not intercooled. ???

HP hard to say to many variables to play with.
This is the one good thing about turbo systems. If your vehicle falls short on the goal, you just turn up the boost.
I see no reason you will need more then 7psi to meet your goal.
Adding an intercooler is very easy to do and does not add a huge amount to the kits cost.

 

is this Yukon a four wheel drive? If so, i would think that it would take a little more than 7lb on a 5.3 with a cam to make 450rwhp whouldnt it? I really dont know but I would assume with something that heavy and having 4wd it would lose alot of power through the driveling.

 

I would say IF you are going to do any towing run an IC.

 

That depends on a lot of things. I made 445hp with my turbo at 4psi...

 

It is a 2wd

 

Talking to a friend last night he mentioned a Magnacharger would be nice too. For my goals turbo or supercharger?

 

If I go turbo should I run the master power 70, turbonetics 67, or Precision 6765. I know I'm asking a lot of questions but being that this setup is for my wife I want it as trouble free as possible. If turbo I'm leaning towards the 60lbs injectors. If supercharged how will the economy play out and what other mods would be needed with a 112 to meet my goals?