Edelbrock Pro-Flo Multi Point EFI System #3509 for Dodge 440
We're slowly becoming experts on electronic fuel injection
systems. This project is about installing an Edelbrock Pro-Flo Multi
Point EFI system in our old bus. Edelbrock has been producing this
system for time, but only recently came out with a version for the
Dodge 440-3 (also called the 440I or the 440 Marine/Industrial).
This will be the third EFI system
installed in this vehicle. With this install, we have now sampled all
three basic types of EFI systems: alpha-N, MAF and speed density.
- alpha-N: this type uses only throttle position and engine speed to
determine the fuel delivery (Holley ProJection).
- MAF (mass air flow): this type uses an air mass sensor to
calculate the fuel required (AirSensors START).
- speed density: this type uses a manifold absolute pressure (MAP)
sensor, along with sensors for throttle position, engine speed,
ambient air temperature and an exhaust oxygen sensor to determine the
ideal air:fuel ratio (Edelbrock Pro-Flo).
Below are links to the various pages documenting the installation:
Part I: Opening the Box, Looking it Over
Part II: Our Exhausting Saga Continues
Part III: Out With the Old...
Part IV: ...In With the New
The results:
Between the new EFI and exhaust systems, we've seen a big improvment in the running
and reliability of our coach:
- better acceleration
- lots more power
- better fuel economy (when I can keep my foot out of it ;-)
- no low speed stumbles
- no reliability problems so far
Our cruising fuel mileage went from a typical 6 MPG to 8+ MPG on level roads. The FMC Transit will never get as good mileage as
a "regular" FMC coach due to the increased weight and frontal area. Still, a 33% improvement is significant.
I still need to do something to arrange cool air induction to the air cleaner. That should improve both power and economy some more.
As it is now, the engine heats up the air about 30 deg F before it gets to the air cleaner.
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email:jim@steinborn.org