Quote:
Originally Posted by MR 45TH
Yeah I'm not a huge fan of canned tunes, granted they are adequate to get you by,
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Actually just had a major player in the tuning world for DECADES.
Just load one of our stock files, log with his very calibrated equipment.
And said... "I not touching this file, this is spot on for a DI car, well done"
Nice pat on the back today.
Quote:
Originally Posted by DenverTaco07
and with a CF of .98
Why wouldn't tuner use CF = 1 at sea level? Just curious or is that with calculating DA and all that jazz? Sorry i'm a dyno noob!
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At least they used SAE which is correct.
Normally you see them in STD which would have resulted in higher #'s.
Quote:
Originally Posted by MR 45TH
Looking at that blue line you can see why I wanted a dyno tune ASAP 
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Why?
That looks like a typical reading for a wideband shoved in the tail pipe.
That is the 100% incorrect way of reading air fuel on a DI car.
You will get a leaner than normal reading.
And these cars hate being rich. (for reasons I have listed before)
The LT1 is NOT and LS1, LS3, LS3, L99, LQ9.
You are very close to what it should be running AFR at WOT...
And that tiny percent I can almost guaranty is two things.
1) the wide band is in the tailpipe
2) sensor error.
Also looks like the belt needs to be tightened.
You boost curve has a wave in it, so either the following happened.
1) Belt slip
2) Traction control wasn't fully disabled, and the throttle closed for a moment
Since I see power also dipped there, it matches my theories above.
I would advise on looking into both of those.
NOTE: We use lab grade air fuel, and 5 gas analyzers here. Calibrated DAILY. We don't mess with air-fuel errors. We don't have the luxury since we have to do LV3 emissions testing.
NOTE 2: If you send me a datalog that actually has the wideband readin from BEFORE the cats, I would gladly adjust your tune if needed. Though you would be the first one out of a cubic boat load.
Just an email away my friend.
tuning@procharger.com