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Just to explain lag time real quick (people like steve, russ, and myself need to write a faq on these basics).
A fuel injector, is constantly supplied 12v power. When the fuel computer desires the injector to open, it grounds out the injector. So. Power comes from the car battery, to the fuel injector on one pin. The other pin, is wired to the Fuel computer/ecu (NOT SAFC).
From the time that the fuel computer grounds the injector, to the time the solenoid of the fuel injector "actually opens" is the lag time. A solenoid is like a piston inside of a shaft, that is wrapped in wire, like an electric motor or magnet (uber basic).
Depending on how many amps are being drawn, how big the solenoid, how many times it is wrapped (coiled), and the guage of the wire, will effect the time between the ecu grounding the signal wire, the solenoid actually opening.
The Fule computer calculates Lag time to keep the injector open at the right time, and for how long, compensating.
Apexi's setup is correction +/-. So, when set to 0.00ms, the PFC is calibrated for a solenoid the same as the OEM 370cc. In the case of the DW Injector, it is still a 370cc solenoid, so the lag time (correction) will remain at 0.
When purchasing (upgraded or different) injectors, make sure you have your new lag time IN WRITING. This can make/break/blow your setup.
To configure new lag time in the pfc:
0.00 = 0.58ms
370cc=0.58ms
New injector (example)=1.5ms
1.5
-0.58
---------
0.92
So you would assign injector lag time to +0.92ms to add correction for the new injector over stock.
This is a little O/T but this needs to be covered for the sake of search indexing.
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