Question about LS3 fuel rail install in 4th gen
04-14-2015, 07:42 PM
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Question about LS3 fuel rail install in 4th gen In the process of installing LS3 crate motor (550 hp) in my 4th gen f-body, have the new FAST 102 lsxr intake and want to use the LS3 fuel that came with motor and also the newer 42lb racetronix injectors off my LS1. I have noticed that there is no pressure regulator in LS3 fuel rail, will I need to add external regulator or is there another work around, I will be replacing pump as well, any help would be much appreciated
Last edited by Superchief-1; 04-14-2015 at 07:54 PM.
04-15-2015, 05:37 PM
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Talked to the folks over at FAST, they got me straightened out on my set up, what I was seeing is for the evap system, not a pressure regulator. Ordered the mounting brackets and o-rings to make LS3 fuel rail work.
