Thinking about Injectors

[saleen880]

I recently had my car dynod 480hp on a ****ty tune,and they told me my injectors are at 100% maxed out and said i need 42lb injectors, currently running 30lbers with fmu and 255 pump,my question is Will my fuel pump supply enough fuel without a booster pump and is it even worth going to a 42lb injector.....just seems like a lot of fuel and i dont want to waste my money thanks

 

[Mike in Texas]

480 rwhp = ~560 fwhp = 48# injectors (for forced induction). Even with the fmu I don't see how you're fueling that much hp (would take ~100 psi fuel pressure). Even with the 42's you would still need the fmu.
check this site Fuel Injector Calculator from WitchHunter Performance

 

[Onefine88]

My SSC makes 441rwhp. I've been running a #GSS-340 255lph pump for years. ( No booster pump).
I'm using 42's with no FMU.
No problems, my A/F ratio is perfect all the way to 6K redline.

With a good tune you'll be fine.

 

[saleen880]

thanks for the help....I went from 24lbers to the 30lbs any didnt really notice a difference...that why im kinda wondering if i would be wasting money, and do any of you have any kind of drivability issues with those injectors, and btw my fuel press does go over 100

 

[7upstang91]

thanks for the help....I went from 24lbers to the 30lbs any didnt really notice a difference...that why im kinda wondering if i would be wasting money, and do any of you have any kind of drivability issues with those injectors, and btw my fuel press does go over 100

Oh man, you do need at least 42lbs! You should probably go to 60s to be on the safe side, if you want more power. 100% maxed out is not good, no matter how good the tune.