ThunderZ28

iTrader: (7)

it just feels like it sits at high rpms, and I was eliminating possible culprits

work in progress

iTrader: (2)

Going static causes heat and will kill your injectors. Steve at SMC can get you 8.1 30 lb injectors for 250.00 (I believe that is what I paid for mine).

2000_Silverado_SS

I had the same problems at the Thunder Shootout with my injectors. It would ping hard from about 4800 on up to 6500 through all the gears. Showed over 100% duty cycle in that range. Didn't care, still raced it hard.
But it is now time to fix the problem. One way by bigger injectors, which ones are a direct fit? The other way, retorque my head bolts cause I think antifreeze is getting into the piston therefore computer is adding all the fuel they can to remedy the now lean condition. Ya'll remember smelling all that antifreeze in the pits! Could this happen?
O1Thunder - Let me know when you find out what is causing your lean condition.

ThunderZ28

iTrader: (7)

Lance you have seen it at the track you know what I am refering to when it sits.
and yes I have it paused right now, and it is sitting at .968

Flyer

iTrader: (1)

96x's are somewhat rich. On my boosted engine, I see as low as 890's. I think that's running on the ragged edge of to lean, but it's been working for me this long.

I would say you should do some tuning.

parish8

iTrader: (6)

i have done a ton of reading on injectors, everything i could find. there are many manufacutres that tell you not to go over 80% but all practical experience from MANY diferent people has shown no problem taking injectors up to 100%. in this case i choose to listen to the people using the injectors (and even bench testing them at 80 thru 100% duty cycle). holding an injector wide open for short periods of time is not going to warm them up especialy with the fuel flowing thru them.

once the a/f ratio is dialed in closer he probably wont be over 100% anymore anyways.

ThunderZ28

iTrader: (7)

will do 2000 SS
I have been guessing for a while here, and finaly got a chance to log it and see for my self.
I have shown 1.5* of knock retard,
my LTMS at WOT are sitting at 6.3% bank 1, and 5.5% bank 2

....urrrgggg

slowprocess

iTrader: (9)

Damn, I better get some kind of scan tool pretty soon, too, huh? No telling what my truck is doing down the 1320!

I don't have a laptop, so what would I need to get?

ThunderZ28

iTrader: (7)

Jeremy I have a dinosour of a laptop, and it works fine..
Toshiba 4015CDT
has the pentium 2 in it...
but it does what I need with the logging software

BigTex

iTrader: (16)

When my stock injectors were maxxed on my SS, the O2 reading would go from .890 at 5400 to near .800 just before shifts. Adding more fuel to the tune would not bring them back up.

I'm with everyone else, .960+ is way rich. Lower your added fuel to get the values just under .900 and you'll be back under 100% duty cycle and find your lost power.