You need to look at how the injector is rated, some are rated at 60 psi and some are rated at 42 psi. I would not buy 85's until you actually need them for your boosted application, they will idle terrible. 600 hp n/a is about as far as I would go with the stock LS3 injector.
Here's how you calculate proper injector size to get you at 80% duty cycle;
Expected max horsepower x 1.2 x .5 for n/a ( .65 for boost) divided by the number of cylinders.
Example for 800 n/a : 800 X 1.2 = 960 X .5 = 480/8 = 60 so you would need a 60 lb/hr injector for an 800 hp n/a engine.
Last edited by 71RS/SS396; 09-19-2014 at 06:58 AM.
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