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Thread: 5.3 injector question

  1. #1
    Join Date
    Mar 2019

    5.3 injector question

    hey all, first post here.
    this is my first LS swap. i've got a 2003 LM7 with about 80K, i've added an LS9 cam a92mm throttle body and I was told that i'd need better injectors.
    i have no plans for a power adder or anything I just want a strong daily driver.
    so what should i be looking for in an injector? 80lb?

  2. #2
    Join Date
    Mar 2013
    Long Beach California
    If all you did was add a cam then the stock injectors should be able to handle that no problem. Not sure who told you that bigger injectors are needed. There are calculators out there to tell you how much flow you need for your engine combo. Again, if you just added a cam and will not add FI, then you should be just fine.
    Like Tumbler in "Gone in 60" I'll drive anything with wheels or without

    My 95 ECSB LQ9 build thread - http://www.ls1truck.com/forums/lsx-t...to-95-obs.html
    Stock 03 LQ9, DBW, 95' 4l80e w/ Transgo shift kit, 2010 50# GM injectors, 2800 Circle D stall, Spectre CAI, Upgraded trans cooler, Home-made E-fans/shroud, Dual EP-381 fuel pumps w/Home-made hotwire kit
    NEXT ON LIST: Dual Battery setup, CAM/Valvetrain upgrade, Build my own rear mount turbo, TRU-TRAC, HIT THE STRIP!!!

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