Just re- reading some of Chucks notes and reviewing multiple maps and I have found MANY differnt lag time numbers for 1600 cc secondaries.

By Chucks notes, the lag time differnce for 1600cc sec should be: 0.16
Some maps show: 0.33, 0.40, ect.

Is there a chart that maybe lists some of the many differences some dealer/injector vendors think the lag time should be?

I imagine the higher lag times just are a safety cushion for more fuel?

 

No one?

 

A lag difference will not affect injector performance or maximum flow rate.
If anything, it should only minorly affect the calculated duty cycle and transistion point.

 

Thanks Chuck.

 

lag time/injector latency is a function of how the injector response vs. voltage. Some people mistakingly think that lag time and throttle response are the same but it is totally not true. In PFC, the setting is based on the stock OEM injectors and you change your lag time +/- comparing to the OEM injectors. When you add a resistor in the system (for 1600cc injectors), it changes how much voltage (voltage divider) is going into the injector. Because of this, you may see many different lag time from different tuner and source since resistors were sold in the range of 4 ohms to 10 ohms. Ultimately, it comes to how the injector is responding to the advance time you put in for the system. To properly characterize lag time on the injector can be very time consuming. You can spend many hrs just to set it up properly. The only time you will see an effect in injector lag time is when you see a change in voltage(A/C, headlight ON. etc...). Your A/F will change slightly when there is a variation in voltage.