budhayes3

iTrader: (19)

Allrighty, I just sold my 31# 8.1 injectors as it seems that they would be maxed out from what I've seen with other guys with those injectors and similar, or milder set ups then I'm planning...here's the specs:
LQ9, WCCH StageII 317's, 220/224 .575/.575 112, truck intake, SW LT's, etc...

I'm thinking that the 8.1 42# Marine Injectors are the only plug and play option for me, I'm just worried that they may be too big for my combo....seems like something in the 36-38# injector range would be perfect, but I'm not sure...I'm just kinda guessing and not doing any math here...

So what are my options and what will work?

Thanks in advance

00ChevyScott

iTrader: (10)

FWIW I'm running 8.1 marines and have no problems.

GMCtrk

iTrader: (27)

why would they be too big? They'll be perfect. I have a new set I'll be dropping in tomorrow myself.

hirdlej

iTrader: (31)

Why would they be too big? They're actually perfect. That's what I run in my setup. At 6200rpm I'm hitting about 67% duty cycle. Anything over 80% and you're starting to "over drive" your injectors. Get the marine injectors and don't look back

budhayes3

iTrader: (19)

Thanks guys...as far as "too big", if your IDC is too low, you may not have a perfect spray at lower RPM's which will not allow for a perfect combustion...just a little theory, you know how I like everything perfectly "matched" I may be digging a little deep, but I'm a little kooky that way.

00ChevyScott

iTrader: (10)

Just looked at an old log of mine, my IDC % is at 73% at 6700 RPM haha, but my truck does run a bit rich WOT

budhayes3

iTrader: (19)

That's in a 5.3? Sounds like the 8.1 marines will be fine for me