Thread: Maxing out stock injectors? but don't think i should be.....

hey i have a 2007 grand prix gt with s1x, cam, oer lifters yella terra rockers, 105 springs and modded retainers, 3.5 pulley, headers 3" down pipe, plugs and t stat and intake ect, and hp tuners and well at about 5100 rpm i reach 100% injectors duty and 23ms pulse all the way to about 136% and 25-26ms at about 6000-6400 rpm. with about 6kr at the 5100+ range. so what i wana know is do i need new injectors or should i start looking at fuel pump and its gay filter in the tank for the 07 if new injectors what should i got with i plan on doing more mods down the road. thanks.

Originally Posted by blackgrandprix

hey i have a 2007 grand prix gt with s1x, cam, oer lifters yella terra rockers, 105 springs and modded retainers, 3.5 pulley, headers 3" down pipe, plugs and t stat and intake ect, and hp tuners and well at about 5100 rpm i reach 100% injectors duty and 23ms pulse all the way to about 136% and 25-26ms at about 6000-6400 rpm. with about 6kr at the 5100+ range. so what i wana know is do i need new injectors or should i start looking at fuel pump and its gay filter in the tank for the 07 if new injectors what should i got with i plan on doing more mods down the road. thanks.

42# injectors are what most of us do as our first injector upgrade. Did you do the fp rewire? Injector size would depend on your future plans for your car bro.

94 oct yes