Klive

iTrader: (4)

I have a few WOT shots on this scan, there is one at 6 minutes in from a dead stop, basically an 1/8th mile or so run. i would love some feedback from some of you guys that know whats going on. the timing is doing some strange stuff, especially just after the 1-2 shift. also its strange to me that the injectors are showing over 100% duty cycle, this is a bolt on only motor, guess the tune must be way off. thanks for any help at all!

01'WS6

Post up your tune as well and mods. Thats some crazy **** going on.

Klive

iTrader: (4)

here's the tune.

Mods are as follows: mid length headers with true duals, ls6 cam, cai, ported tb, 6.0L ported heads. Its a stock 5.3L motor 4.10 gears

01'WS6

Do u have a file of the stock tune?

Klive

iTrader: (4)

no, when I saved it I screwed up and altered it after that so its not a totally stock tune.

foff667

iTrader: (2)

injector duty cycle depends on a few things including how accurate your ifr(injector flow rate) table is, not to mention how large your injector are, how much rpm you're turning & what your commanded afr is. From the scans you can't see what your commanded afr is(your not logging it) but your editor shows 11.5-11.9:1 in the range where it hits 99-100% duty cycle at 6000-6200rpms. Add to that you're only running 25lb injectors these are two big factors contributing to why your seeing that high, if you have access to a wideband and see your actual afr is around 11.5-11.9:1 you could always lean it out some so that your IDC's come down with that commanded afr.

Klive

iTrader: (4)

I have an LC1 wideband I'm going to have to install this week so hopefully I can get it leaned out, or atleast get the IDC under control. I'm going to go make a few WOT runs in a bit and log the afr and commanded afr as well as cyl. airmass. Thanks for the early comments guys, hopefully the next scan provides a little better info.

01'WS6

I also think your nasty timing drops has to do with your torque management being so aggressive.

Klive

iTrader: (4)

ahh, I didn't think about the torque management, thats what that is.... here is another scan from today, there is a longer WOT pull up to about 95ish, I need to lower that shift point, it falls on its face right before the shift. It is attached.

Klive

iTrader: (4)

i leaned it out a bit, however, as you can see in the last scan (xxx) it is still maxing out the injectors. Now I can't believe that with just bolt ons and ported heads I would be in the need of bigger injectors, I also realize that the tune could be so far off that its got the IDC all wrong.