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Does my a/f seem right?

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Old 03-19-2012, 12:18 PM
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Default Does my a/f seem right?

Finally got my lc-1 installed the other day, and been checking out my a/f.
At crusting speeds it reads anywhere from 13.9-15.2
And when I get on it, it reads 13.4-13.8
When decelerating it'll go to 16-18 but that seems normal.

What you guys think? To lean, to rich? Almost dead on?

Sorry if anything is wrong I'm doing this on my phone.

Ok, got a new MAF and it runs 11.9 @ WOT and 14.0-15.0 at cruise.

Last edited by White94Bird; 04-21-2012 at 03:49 PM.
Old 03-19-2012, 12:37 PM
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What you guys think? To lean, to rich? Almost dead on?
Too lean, not even close to dead on.

You're part throttle needs a lot of work, too much swing. Mine is between 14.4 and 14.8 most of the time with some bigger spikes every once in a while.

Full throttle should be about 12.6-12.9 if you're naturally aspirated, 11.5-11.7 if boosted. What you have now is dangerously lean and I would not get on it at all until you have this fixed. That lean you could do some serious damage at full throttle.
Old 03-19-2012, 01:31 PM
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Where is the sensor installed? If it is far enough from the headers it might read lean from what I hear.

My idle and cruise sits at 14.8-15.2 and the way EFI live does it's auto tune it always puts WOT at 13.1-13.4, but I adjust it to get it at 12.6-12.8

Was the car tuned? By whom?
Old 03-19-2012, 02:08 PM
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It's about 4 inchs back from the collectors, and hasn't been tuned. Mods are in the sig btw.
Old 03-19-2012, 04:28 PM
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Your sig isn't showing up.
Old 03-19-2012, 05:02 PM
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Exhaust only, lts,, ory,, borla
Old 04-21-2012, 03:49 PM
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BUMP!
Ok, got a new MAF and it runs 11.9 @ WOT and 14.0-15.0 at cruise.
Old 04-22-2012, 12:49 PM
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Well now you're way too rich...for an N/A car you need to be more in the mid-high 12s. And again your part throttle needs more adjusting.
Old 04-22-2012, 02:33 PM
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If the car has never been tuned with the full exhaust that could probably throw it off ever so slighty
Old 05-18-2012, 07:05 PM
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WEll after driving it some more, it has gone to 12.5-12.9, and cruise is 14.2-15.
Old 05-18-2012, 08:07 PM
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if your WOT is about 12.5-12.9 and cruising is 14.2 most of the time then I would say its doing ok, I don't like it if its leaning out at part throttle to 15+ most of the time...stoich is 14.6 for cruising you want to be there or below just a tad bit.
I would take it somewhere to have it checked and tuned. THose mods you have need an adjustment in the tune.




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