TransWS6Am

iTrader: (41)

as the title states.

NXZ28

iTrader: (45)

Mine is a 415 and I run Holley 50# injectors with no issues.

82cetuner

iTrader: (9)

I had planned 42s for my application I think for a NA motor that should be sufficent. I dont see any reason to go over 60 I think anything in that range will work once tuned.

Best think you can do is find out what duty percentage yours are running at full throttle right now to determine if you even need to change them. Remember Fuel injectors dont help gain horsepower, there only there to supply the correct amount of fuel, if you ever gain HP its cause your current ones are maxed out and causing your car to run lean

TransWS6Am

iTrader: (41)

yeah i have stock ls3/ls7 injectors right now, 42# in a f-body. I need to see what my duty cycle is once i get my rear end in and get the car back on the road.

82cetuner

iTrader: (9)

I think you will be ok, if your not over 80% duty at full throttle and max rpm you would be waisting money going bigger.

Unless you plan for a Dry nitrous kit in the future, but if you go wet you wont need to change them.

but if you ever go forced induction then you will need some really big ones

82cetuner

iTrader: (9)

Im still not doing my swap till about october, but I did find some SWEET valve covors with Pontiac on them

Have you talked to MWC yet on your rear end. are you keeping abs and traction control?

I wont to keep mine so just wondering if you did on yours I emailed them and asked them if it was possible but never got a reply

TransWS6Am

iTrader: (41)

i haven't talked to them for a week or so. I placed my order 6 weeks ago tomorrow. So i have my fingers crossed that ill get the call that my rear end is done within the next week or so.
Yeah i kept my ABS and traction control.

same o'j

-Fast 40lb Uscar Fuel Injectors
thats i use with my LS3 416 , and it work fine , car made 510rwhp

TransWS6Am

iTrader: (41)

thanks for the input guys, I have a dyno tune scheduled next a month, and I was worried about hitting max duty cycle on the LS3 injectors.