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Anyone put a wideband on a stock/nearly stock engine?

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Old 09-29-2013, 11:53 AM
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Car: Turbo Buick
Engine: 3.8 V6
Anyone put a wideband on a stock/nearly stock engine?

I've only run widebands on modded stuff. I'm wondering what kind of WOT AFR something like a nearly stock LB9 runs but datapoints from other engines would probably be helpful (i.e. L98/L03). I've always heard the factory tunes them on the rich side, but how rich?

I'm working with a stock s.d. LB9 that just has headers/exhaust. Curious to know if there are gains to be made by leaning it out at WOT a touch.
Old 09-30-2013, 08:17 AM
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Re: Anyone put a wideband on a stock/nearly stock engine?

Stock calibrations will run the WOT AFR into the 10's. This is done to put out the cat-con. There is power to be had by leaning it out into the 12's.

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Old 10-01-2013, 08:57 AM
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Re: Anyone put a wideband on a stock/nearly stock engine?

Thanks for the reply Rbob. Makes sense though an AFR in the 10s is richer than I would have expected.
Have you ever had the chance to quantify the gains (from leaning out WOT) on a stock-ish setup?
Old 10-01-2013, 02:47 PM
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Re: Anyone put a wideband on a stock/nearly stock engine?

Originally Posted by Pablo
Thanks for the reply Rbob. Makes sense though an AFR in the 10s is richer than I would have expected.
Have you ever had the chance to quantify the gains (from leaning out WOT) on a stock-ish setup?
I haven't, simply because I changed the commanded AFR before I did back to back testing.

RBob.
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