kellycd410

iTrader: (5)

Im running my new 383 stroker with st 2 ls6 heads and i changed to the ls6 intake and whatever sizestock ls6 intake injectors is what im running now,i think they are 28lbs , my car has been tuned however i did i data log yesterday and my duty cycle on my injecters spiked to 128 (6100 rpms) i obviously need bigger injectors, what size should i run to maintain the best performance and fuel economy as well, and is a new fuel pump/fuel rails also going to be needed? please help thanks

LS1-450

iTrader: (33)

42#ers w/ PCM injector setting mods required + Walbro 255 lph fuel pump. Stock fuel rail is OK.

Squirts11

iTrader: (14)

42s should be fine. Make sure you don't drive around with them installed unless the PCM has been calibrated, otherwise you could wash the cylinders with excess fuel

69LT1Bird

iTrader: (1)

Call Jon at FIC and he will get you the right size and the easiest to tune injectors.
http://fuelinjectorconnection.com