Generation IV External Engine - What horsepower can stock LS3 injectors support?

I'm building an L92 headed LQ9 for my IROC, and the LS3 intake/rails/injector take-offs on Ebay are looking pretty appealing. What kind of horsepower levels can the stock LS3 injectors support? My goal for the engine is 450-ish RWHP.

The LS3 vette has ~430hp so I think you're good at 450hp with the LS3 injectors.

I thought I read that they use LS7 injectors somewhere. But just open the tune file and check injector flow stats.

I'm building an L92 headed LQ9 for my IROC, and the LS3 intake/rails/injector take-offs on Ebay are looking pretty appealing. What kind of horsepower levels can the stock LS3 injectors support? My goal for the engine is 450-ish RWHP.

im in the same boat as you. also interested to know.

my truck makes 458rwhp and 435rwtq . using a 230-242 size cam stock truck intake manifold . and bolt ons.... @ 6100 my injectors were at 91% and 6700 they were at 102% using a lenient 18% drive train loss even with 22'' wheel's my motor makes around 540hp and 513tq at the crank ..

so we can just say anything over 550 at the crank ur asking for trouble!






dunno if this helps but theres my 2 pennies

The LS3 vette has ~430hp so I think you're good at 450hp with the LS3 injectors.FWHP vs. RWHP. Big difference.

I have 440'ish on LS2 injectors and havent had a problem.