Fuel system upgrade?

[BLOWN25TH]

I have a 12psi 355 TPI w/200cc pro1 heads, blower cam and free flowing exhaust. Currenlty i have ATI's fuel pump along with 24lb injectors. Can i get away with these injectors with a custom chip or do i need larger ones. ? I know dyntuning will tell me but i am trying to find out before i put it together and start burning chips and money. Suggestions would be helpful. Thanks

[IDOXLR8]

Are you still running an FMU? WHat is your injector duty cycle?? From your setup it seems like you should be running 42 lb injectors. I would eliminate the ATI inline pump and install an Walbro 340 intank.

[BLOWN25TH]

I dont really know the duty cycle of my injectors are. I dont know the formula. Yes i do have a FMU.

[Ben383]

As what was stated earlier by IDOXLR8 , I would say 42lb injectors would be right for you .

Ben

[IDOXLR8]

Originally posted by BLOWN25TH
I dont really know the duty cycle of my injectors are. I dont know the formula. Yes i do have a FMU.

What do you use to scan your car?? Ideally you want to be around 80% duty cycle. If you are over that many people tend to raise the fuel pressure to lower the injector duty cycle.

[BLOWN25TH]

The dyno will be my scan tool. Would i still have to use the FMU if i went with 42lb injectors?

[94SLUG]

Do you have stock pump? I have a 255 with 42s i(no FMU) have only spun to 4k due to a new motor, but i think i will be ok. Tell you in a 1000miles