Originally Posted by Takeda
All you will have is a lighter wallet!
You can do different injectors and a pump but you need to understand the reason you would want to. If you plan on turbocharging you will have more air and need more fuel to keep the recipe right. The simple way to do this is called fuel map scaling. It is like a ratio style problem.
For example, in my car I went from 600CC injectors to 1000CC injectors. I went with a bigger turbo than my stock one so I could get more air at the same boost levels. You have to scale back the pulse width so it is only open 60% as much as it was before. Think of it like a squirt gun. To get the same amount of "water" with a super-soaker compared to a kiddie squirt gun, the supersoaker would just barely have to have the trigger pressed for a split second, while the kiddie gun would be shooting for quite some time.
I don't know about the Ranger ECU but going with injectors that are too big on a stock ECU is like trying to fill a shot glass with a garden hose. I have a hard time tuning anything bigger than 1200CC on a stock Subaru or Mitsubishi ECU.
Oh yeah, of course you also need to have the proper pressure to the injectors, but that should be done before the injectors are installed.
If you put bigger injecors in without rescaling it will run rich and throw codes, and more than likely ruin converters if it is done long enough. The computer will try and compensate but it will be too confused to do it properly.
I think you are wasting your time doing this unless you have some sort of turbo/supercharger.
Always remember that engines work like making macaroni and cheese. Have you ever made the Macaroni with not enough milk and too much of the powder? It tastes too dry and lumpy then. Have you ever made it will too much milk and not enough powder? It gets all runny then. There is a magic recipe for air and fuel too. More fuel without the air to match it won't help.