Reply to "408 dyno results"

Mike your motor sure is pretty, good job, congrats on the results.

Advantages of Fuel Injection compared to Carburetors from a performance perspective:

(1) Better fuel atomization at low engine speeds. About 15% more torque & BHP below 2000 rpm, lessens or eliminates cylinder washing.

(2) Port injection offers better fuel distribution over a single four barrel carburetor when used with a common plenum manifold. This is not an advantage with independent runner systems.

(3) Not affected by G-Forces during acceleration, braking and cornering. Fuel sloshing in the fuel bowl of a carburetor affects the carburetor worse and worse as G forces rise.

(4) Not affected by rough terrain (off-road racing)

(5) No reversion, which has been a stumbling block for engine builders installing independent runner systems employing carburetors.

(6) Easier to design torque enhancing long runner intake manifolds for fuel injection. The tightly curled manifolds that are so common today would not work with carburetors. The fuel mixed with the air by a carburetor mounted on the inlet of such a manifold would be thrown out of suspension by centrifugal force.

(7) Tuning with a lap-top is faster than changing jets.

-G