Reply to "Turbo Owners"

First,
The difference between Full sequential and semi or phased sequential. Full sequential injection will inject fuel once per engine cycle or every 2 revolutions. Old school methods were to inject on the open intake valve. However, it was found that the droplets were too big and it was found better for fuel econemy and emissions to inject on the closed valve. Then when the valve opened, the sharp edges of the valve atomized the fuel. At full throttle and top RPM where most HP is made, the fuel is injected for about 90% of the time. This means that the fuel is injected on both the open and closed valve. Full sequential injection requires a camshaft reference.

Phased sequential injection injects once per revolution or twice per engine cycle. It typically hits both an open and closed valve. This is a good comprimise for a retrifit and has a minimal effect on fuel econemy and emissions and no effect on power.

The oldest method of injection is batch fire where all injectors fire at once each revolution. It is anyones guess where they will hit on the valve being opened or closed. Batch fire works just fine and will give 99% the power and ecomemy of the sequential methods.

Blaine,
You dont need full sequential to do injector trims. Most computers should be able to do this with phased sequential and individual injector drivers. Unless you plan on some serius full time racing, I would not bother. Even Factory cars have injector trims such as Ford, but in the ECM, all the values are zero.