MPI or Carb?

[DHD]

Looking for some input from guys that have gone the EFI route. I have a stock OBD1 MPI 5.9 and trans going into my Coronet, I also have a M1 single plane 4bbl intake so i could go the easy route and also upgrade the cam and other stuff down the road without the computer problems. The MPI wiring seems to be pretty staight forward but i want to know if its worth it? I want the car to be a reliable , fun street car, is there a significant improvement in fuel mileage and driveability with the MPI?

 

[SwedCharger67]

My guess is that if you change the intake you will need to change the air/fuel mapping as well. I don't know what kind of control you have over the mapping with that engine management system?
I'm myself right now converting an M1 intake to sequential port injection for using in my 512.

 

[RustyRatRod]

I like carburetors because I am familiar with them and know how to build and tune them. I am old and don't want to have to go slam back to school in order to learn about somethin I really don't give a fig about anyway.

 

[SwedCharger67]

Forgot to comment on the rest...

I think the biggest benefit with MPI is the flexibility it gives you. A perfectly tuned carb gives just as much power as EFI, but has less flexibility (depending on the engine management system you have).
By mapping the air/fuel ratio for the low load cruise conditions on the lean side, and stopping the injection altogether when no throttle is applied and speed slowing down, you may save some fuel.

The other big benefit I think is with highly tuned engines, with big cam, big intake ports, big intake and big carb...often very difficult to get good low speed behavior due the low intake air speed and the fuel separates from the air in the intake, causing some cylinders lean and others rich. With the MPI this is not a problem since you spraying to the back of the intake valves, however with a TBI system you still have the same problem.
I.e. you get better low rpm characteristics with MPI in your advanced engine, due to the better air/fuel mixture provided by the port injection.