5.0 injectors in 3.0

[92ranger18]

I had a set of injectors out of a 5.0 laying in the shop, and want to know if I put them in my 3.0 ranger if they will hurt anything besides gas mileage. let me kno something.

 

[disciplerocks]

If it is only a small jump in size, you can put them in and your ecu can adjust itself to them. (assuming you reset the ecu after installing)

If its more than a couple pound difference, then you can use the 5.0 maf and housing to send the correct signal to the computer.

Either way be sure to reset the ecu so it can relearn the new fuel trims.

 

[Beanmachine7000]

Why would you even do this? Do you think Ford spent all that money figuring out which were best for your engine just so they could put the wrong ones in? Don't mess with it... It won't do anything...

 

[Mac]

I see this all the time at Mustang sites, people wanting to change up a size and think they are going to get more power with that being the only change. The 2000 Explorers actually went down from 19# to 17# with the better designed spray pattern and kept the same HP.
Dave

 

[adsm08]

Will those even fit?

 

[disciplerocks]

Yeah they will fit and I am staying out of the whole "why would you want to do that" conversation. I just posted how to make it work.

 

[adsm08]

Yeah they will fit and I am staying out of the whole "why would you want to do that" conversation. I just posted how to make it work.

Hmm. So if 5.0 injectors fit a 3.0, it would follow that 3.0 injectors would fit a 5.0. I wonder if that would make it run too lean, or if you could still flow enough fuel to make it run right, but maybe drink a bit less, for RBV type applications.

 

[84stealthranger]

u gotta have both fuel and air so it wont do anything unless u have like a after market intake

 

[Hahnsb2]

Hmm. So if 5.0 injectors fit a 3.0, it would follow that 3.0 injectors would fit a 5.0. I wonder if that would make it run too lean, or if you could still flow enough fuel to make it run right, but maybe drink a bit less, for RBV type applications.

You're playing with fire.

If the injectors are similar sized the computer can compensate for it in closed loop, keeping the AFR at 14.7, during open loop such as warmup and WOT, the computer just fuels using preset tables, use a different size injector and it will dump in too little or too much fuel.

On a relatively stock engine with no way to tune it, you aren't accomplishing anything by playing with injectors.

 

[Mac]

Injectors basically fit all but size is dictated by requirements.
Here is a good little calculator to play with. Other sections cover fuel pump and size of exhaust.
Dave
http://www.autolounge.net/calculators/fuelflow.html

 

[92ranger18]

ok well how would i reset the ecu

 

[Hahnsb2]

ok well how would i reset the ecu

We've already told you not to do it, you aren't doing anything positive by swapping injectors.

 

[Psychopete]

You are wasting your time. Why would adding more gas equal more power? The computer is already trying to maintain a balanced air fuel ratio, changing the injectors is going to cause the wrong amount of fuel to get into the cylinders. Installing bigger injectors sure isn't going to get more air into the cylinders, and that is what you need to justify bigger injectors. The final outcome of what you're asking is going to be a poor running POS.