I forgot what it meant...so here ya go:dank said:spi= split port injection, right?
what does that mean
Got this from Ford GlossarySplit-port Induction (SPI)
Most split-port induction systems have a dual-runner engine intake design promoting high-volume/high-velocity airflow to increase engine performance. The dual-runner design features long, small-diameter runners tuned for low engine rpm torque and short, large-diameter runners tuned for high rpm horsepower Runner usage is controlled by the electronic engine controls and integral throttle- body valves The Focus and Escort 2.0L I-4 engine uses a cylinder head with two runners per cylinder. These runners carry the air charge to the intake side of the combustion chamber. At lower engine speeds, the air charge is directed through a narrow pathway that results in a higher air velocity, quickening engine response. As engine speed increases above 3000 rpm, the second path works to further enhance engine power and operating efficiency