You have to know the difference in the injectors to calculate how much to scale back the injector tables for the larger ones. Be careful as some inj. labeled 36# may actually put out 33#, doublecheck.
SAY stock inj. is 33# and you throw #65 inj. on.
33/65 = .507
Using this, we know that the 33# are 51% of the 65# inj.
Depending on the tuning software or whatever your using, you should change your injector flow rate table. In powrtuner, you open this table and select the cells and multiply all values by 51 percent. What happens is that it scales back the flow rate 51% making the change flawless. It will probably still need to be tuned in to get things perfect.
