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Thread: injector sizes recommendation 500+ hp

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  1. #1
    Join Date
    May 2008
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    Crowder, OK
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    I doubt you hit 500 with that setup, but you might. 42s will work for you, 60 if you plan on some FI later.

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  2. #2
    Join Date
    May 2009
    Location
    Farmington, MN
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    154
    My buddy that took my 6.0 off my hands punched it out to 6.2, used the L92 heads and L76 intake, and a TSP 232/234 598-608 112 cam, and I think he's shooting for about 550 hp. This is all info from some old chicken-scratch on an old notepad, but the injectors I have written down are p/n 12576341? IIRC he scrapped the L76 injectors and got some that were 3 or 4 lb bigger or so. Maybe 46lb?

    There's a few fuel injector calculators floating around here somewhere.. And you might as well get ones that are just a little larger than needed so you don't have to re-tune later when you realize you're nearing 100% duty cycle (that from personal experience)
    2000 Sierra rcss, LS6, xr265hr-15, HP Tuner, B&M, traction, cai, 2-4, 3.73 G80, Centerline, Pacesetters w/custom pipes and mufflers

  3. #3
    Join Date
    Feb 2007
    Location
    Spring, Texas
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    1,739
    I would say go with 60's just to be sure. Better safe than sorry and better to only have to do it once!

    2004 Silverado Crew Cab, forged iron 5.7, STS w/MP turbo, 10+ psi, FMIC, Tial 50mm BOV, Vic Jr, Snow performance meth, MTI Stealth cam .220/.220 .581/.581 115lsa, Comp chromoly pushrods, Yank TT3000 stall, LS1 Efans, 160 tstat, Trucool 40k trans cooler, 60# injectors, Walbro fuel pump, Patriot springs, Built 4l65E w/billet input & output shafts, Eaton posi, SD tuned...all installed by Klein North Automotive

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