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Idle AFR?

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Old 06-25-2014, 11:30 AM
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Default Idle AFR?

What should my idle AFR be? Mostly stock LS1
Old 06-25-2014, 03:36 PM
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Originally Posted by cthulu
what should my idle afr be? Mostly stock ls1

14-15
Old 06-25-2014, 04:26 PM
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So I need to lean out my idle. I put in 42# racetronix injectors and have their data in the tune but it's still showing up very rich.

What injector tables would affect this? (not much data out there for these beyond a very simple PDF from the manufacturer)


I'm not sure of the manifold vacuum scaling for the flow rate, though I have it configured at 48.860 for 0 vacuum. (so at least I adjusted from the default 42# at 43.5 PSI)

I kind of guessed for the scaling.

For the Offset vs. Volts vs VAC I got a chart from the manufacturer that let me get 0 vac values in. I then looked at the stock values at 80 vac and found the percentage increase from stock at 0. Then increased my new 0 vac values by the same amount and blended the values in between.
Old 06-25-2014, 04:48 PM
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Idle AFR can be as lean as 16 to 17.



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