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  1. 02-19-2017 #4
    Fast355
    Fast355 is offline
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    Quote Originally Posted by JCampbell View Post
    New engine for my Suburban, trying to tie up some details.

    Fresh L31 Vortec longblock, internally stock. Fresh 5.7 injectors. Ultimate'd throttle body. Mercruiser TBI intake, Thorley tri y's w/ Y pipe.

    Looking for reccomendations on fuel pump and FPR spring. Not certain on what pressure I should be looking for. 14? 16? 18?

    I would use the 1992-1994 4.3 W CPI Astro pump. Along with an external regulator. Would try around 20 psi with the stock 61 lb/hr 350 injectors.

    Kinda doubt you will like the stock L31 cam in that setup.
    Last edited by Fast355; 02-19-2017 at 09:12 AM.
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