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Old 06-05-2013, 08:35 PM   #1
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Fuel Injection Systems

80 LB/HR FUEL INJECTOR SET - Justin's Performance Center

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So I was looking at changing the stock injectors and have done some searches on the forum and internet. From what i can tell you can expect 10-15 HP by adding new injectors. Then I was reading if you change the injectors you have to change the MAF, Is this the case? Also, there a direct way to figure out how much HP the injectors add.
For example on the 80lb/hr does that equal 8HP so a 10:1 ratio. Does anyone have experience with changing the stock injectors? is there really a noticable improvement? Of the above two which would be better?

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Old 06-05-2013, 08:48 PM   #2
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U won't see a benefit from larger injectors unless u go with E85 or FI. I installed the super coils but didn't notice much of a HP bump.

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Old 06-05-2013, 08:48 PM   #3
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Upgrading injectors without upgrading anything else will not yield any power gains. The stock 39# injectors are more than enough for any NA, bolt on, gasoline car. If you switch to E85 then upgrade to 47# injectors or if you get head work done and more aggressive cams I would look into slightly bigger injectors. The 2013 gt500 only has 55# injectors, trust me, those 80's will do absolutely nothin for you unless you go FI... And lots of boost at that.
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