2doorfury

iTrader: (12)

interesting scott..definetly needs to be cleared up if so

KLUG'S SS

iTrader: (6)

The 8.1 truck injectors are absolutely 1000% rated at 30 lb/hr at 4 bar (58 psi) not 3 bar. This can easily be seen by any of you guys with efi live or Hptuners, just pull up a stock tune file for a 3/4 ton truck with the 8.1 in it.

00silvylq4

ok so would it be better to go with the 8.1 injectors or the nnbs flex fuel injectors that I believe flow 36 lbs???? Don't wanna upgrade and it not be enough or upgrade and it be to much. This would be a for 6.0 217/223, LT's, and tune. What size are the stockers? 21?

SCOTT_A

iTrader: (1)

My 6.0 has long tubes and a tune. stock cam. In my motor, the 8.1 truck injectors are at 85% duty cycle. So not much room left for me.
My old 6.0 injectors were 25 pounds/hr.

00silvylq4

Ok seems like the nnbs flex fuel 36lbs injectors would be the better choice.

N/ALS1

iTrader: (1)

Do you know what the pn is for the nnbs injectors?

skolman91

iTrader: (28)

nnbs flex injectors are 12594512 i believe, and are a dark blue..

KLUG'S SS

iTrader: (6)

Yes that little bit extra cushion would be good.

AndysC3

iTrader: (14)

Your cam should pull to at least 6800. I shift mine at 6900 and see 63% idc at 6900 with the 8.1 marine 42# injectors.

N/ALS1

iTrader: (1)

I got my 8.1 non-marine injectors test and cleaned and they only flowed at 25 lb/hr. Also what is the pressure that our trucksrun at?