I am going to get my secondary injectors enlarged to 1200 or 1300 cc's.

In addition to changing the injector size, do I need to change the injector pulse correction value to 850/1200=71% or 850/1300=65%.

Also, do I need to change the injector lag time? If so, what are the lag times for 1200 & 1300 cc injectors?

Some people on the list have told me just to change the injector size and leave the correction & lag times alone but that doesn't agree with the instructions on page 25.

Do 1200cc injectors have a better spray pattern than 1300cc? I just want to increase my boost to 1bar. I was at 87% duty cycle at .75 bar. In other words, is it better to not go larger than you need to?

Thanks!

 

Page 25 and 26 of the manual explains it in detail.
As for the secondary's (1200cc) lag time, a PFC that came programmed by Ray (Shane Racing) for 1200s had +.04 lag time.