Multi Port VS Sequential Port

[92ghost]

For the 92-93 LT1 corvette the Fuel Injection offered was a Multiport FI where (and I think this is how to describe it) each nozzle on one bank (side) will fire regardless if the intake valve for that cylinder is open. Tis will happen as long as one valve is open on that Bank. In 1994 to 96 the Fuel Injection of choice was the Sequential Port FI where only the injector for the open Intake valve will fire. I thought it obvious for a Multiport FI to be waisting fuel, dificult to idle and give erratic performance. Why then does the 94 - 96 LT1 seemingly have identical performance numbers and yet a completely different induction?

Part 2: If Sequential Port FI is so superior, would it be worth the effort to convert a MPFI to SPFI? I'm assuming the computer in a 94-96 has all the necessary programming to accomplish this. Is it simply a matter of swapping computers?

 

[Skant]

As I understand it, all fuel systems produce the same effect... an air fuel mixture of a very particular ratio.

Carburated, fuel injected, multiport sequential fuel injected... doesn't matter. The end result is still an air fuel mixture of the correct ratio.

The difference between the fuel systems is more in terms of fuel economy... how efficiently they atomize the fuel and get it into the cylinders without wasting a drop.

The later model cars had the same horse power rating... but got a little better gas mileage.

- Skant