How much Hp can stock injectors handle?

[AaronD81]

How much for stock injectors and how much for Millenias? Most people running boost switch to millenias, but I couldn't find a real number, just mods. Is there a cutoff when you should switch to bigger injectors?

[El_Chineois]

I thinks it 230hp - 240hp...but I'm note sure... plz corect me if I'm wrong.

[TRWeiss1]

hmmm..very good question. I wondered the same thing.

[bryantaylor]

there are just too many factor to just have a hp limit. when your duty cycle is to high, it time for bigger ones. us MS guys can actually see our duty cycle

[spada]

also depends on what fuel pressure you are running, stock injectors with fuel pressure upped by an FMU can hit near 90psi or more. 220cc/min injectors at 90psi is quite a bit of fuel, and that will get you past 250hp easily. but then, the injectors probably won't last as long.

for a simple breakdown, check out this page http://www.msefi.com/msinfo/manual/minj.htm

[94PGT]

How much for stock injectors and how much for Millenias? Most people running boost switch to millenias, but I couldn't find a real number, just mods. Is there a cutoff when you should switch to bigger injectors?

depends on what your setup is. are you n/a or f/i? stock fuel pressure or higher?

injector flow (lbs/hr) = (hp x bsfc)/ (# of injectors x duty cycle)

stock ecu limits duty cycle to 75% iirc.

a bsfc of .5 for n/a would give you around 190hp with stock fuel presure for stock injectors, or around 230hp for millenia 280s. if you could find 310s you would have around 260hp worth.

if you use a bsfc of .6 for f/i, all the above hp numbers will decrease.

[AaronD81]

Thanks for all the info guys, Spada that's a great page.