[D-CEL]

Anthony,

Kind if true?
To say that the EFI system made less hp because the fuel was “occupying space” that should have been occupied by air… confuses me.
The mixture of air and fuel (a/f ratio) to achieve peak performance is fairly straightforward. Chemically correct is 14.7:1, slightly lower in practice. If the volume of fuel was so great that it displaced air, the a/f would be hugely rich (read to much fuel). Combustion performance would suffer or not work at all.

Are you saying that a carbs make more power because they rely on vacuum and therefore the fuel takes up less space in the combustion chamber?

I think the article was comparing the dual plane manifold and a Holley Carb vs. the early Mercury Cast aluminum EFI manifold with a single throttle body and a small square flame arrestor. It successfully showed that the EFI system made less peak hp than the carb, because the intake tract was long and more restrictive.


Jason