INTERNAL ENGINE MODIFICATIONS Valvetrain |Heads | Strokers | Design | Assembly

Bigger injectors??

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Old 04-30-2009, 06:01 PM
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Default Bigger injectors??

I see a lot of guys goin with bigger injectors even if they dont the amount of mods i do in my motor, was wonderin what would be a good step up from the stock 5.3L ones that i have now and if its worth it.
Old 04-30-2009, 06:07 PM
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Well....what mods do you have? Bigger injectors will do nothing for you unless you are maxxing the ones you have. Most scanning software can give you Inj. duty %
Old 04-30-2009, 06:13 PM
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Ok then i will just have to get ahold of of my tech guy who tunes it with HP Tuner and see what he says.
Old 04-30-2009, 07:42 PM
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what are your mods? most guy's here will be able to tell ya if your maxed out or not...it doesnt take a whole lot to max the stockers out.
mine are at 98% with LT's, cam, and a few small things. anything over 85% (I believe?) should be upgraded with some bigger injectors
Old 04-30-2009, 08:10 PM
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What are your mods??? If you seen guys upper injectors without supporting mods they are idiots.. Only the diesel guys can do it to get more power... Unless your F/I or full bolt ons with the spray, you stock injectors should hold you over..
Old 04-30-2009, 09:30 PM
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With my mods in sig my injectors are like 94% i believe.
Old 04-30-2009, 09:33 PM
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Well i have a bit done internal and every bolt on on possible and will be sprayin in a couple weeks. Its a 5.3 bored to ls1 flat top pistons, cam 588 lift, heads port polished and milled 1000 to compression around 10, of course springs dual patriots, stock crank, intake stock but throttle body polished and shaved smooth, and some tricks cant tell everything gotta keep a few secrets......
Old 04-30-2009, 09:39 PM
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just guessing but im thinking you need bigger injectors....the stock 24lb/hr are not cutting it.
Old 04-30-2009, 09:44 PM
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Bullshit there are no secrets here, spit them out or face


You will def need injectors
Old 04-30-2009, 09:46 PM
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Originally Posted by peterls1
Well i have a bit done internal and every bolt on on possible and will be sprayin in a couple weeks. Its a 5.3 bored to ls1 flat top pistons, cam 588 lift, heads port polished and milled 1000 to compression around 10, of course springs dual patriots, stock crank, intake stock but throttle body polished and shaved smooth, and some tricks cant tell everything gotta keep a few secrets......
milled .001 or .010?


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