MAF
MAP
AFM
variable TPS
02 sensor as closed loop+ accel
K jet type mech
Which is best ?
Speed density provides the most accurate load info, and is cheapest

Alpha N is the least restrictive but hard to setup and only really used in conjuction with TB's
lets use MSq as an example.
map load via MAP
map accel via TPS
map enrichments via IAT/coolant temp
if using a wideband 02 that can be set with look up maps to ensure a perfecto Stoich mix @ idle, 13:1 AFR for snap accel via TPS rate of opening and corresponding MAP drop ( N/A setup)
the you get into variables like time and PWM/duty cycles of injectors
none of the above is fixed, you can use many other sensor including two extra IAT sensors , one pre IC one post to measure the IC efficiency and again alter maps to compensate.
you can also use dual tables for all sensor inputs if you really wanna go to town.
best system is the one with the most load sites you can map too.
Unichip uses 8x8 tables for fuel and ingnition I believe ?
MSq uses 12x12 for fuelling , all the setpoints are variable so if you had a chronic flatspot etc you could move three locations into a 1k rpm band to improve the situation
do what I did dude, get info on all, realise the potential of all and then spend the
