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Old Feb 22, 2007 | 10:47 PM
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how would i go about changing the a/f mix and how do i know what i would need it set as for a 100 shot?
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Old Feb 22, 2007 | 11:22 PM
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For a Wet Kit changing the AFR is easy, change the fuel Jet up or down as needed. generally it is agreed that under 12.0 is a Safe AFR will spraying.

Other tricks include turning the nozzle toward or away from the MAF (for Dry Kits) and using software such as EFI Live or HPT to modify the tune.
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Old Feb 22, 2007 | 11:48 PM
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how do i know what my a/f is ?
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Old Feb 23, 2007 | 12:00 AM
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The best way is a Wideband installed on your car. If you do not have a Wideband installed on your car, you can test the system on a dyno, they will put a sniffer in the tailpipe and record the AFR for each dyno run.

If you have a hand held tuner, you can read the narrowband voltages (from the stock O2 sensors) and guessimate the AFR.

I would not bother with Narrowband gauges. Wideband is were its at for accurate tuning.
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Old Feb 23, 2007 | 12:27 AM
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thanks
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Old Feb 23, 2007 | 12:28 AM
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whats better the wideband or the dyno way?
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Old Feb 23, 2007 | 12:41 AM
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If your going to get into tuning, I would recommend a wideband installed in your car. If you are going to be an occassional sprayer, testing on the dyno should suffice.
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Old Feb 23, 2007 | 11:38 AM
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know of where i can get a wideband thats good? and which one is good.
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Old Feb 23, 2007 | 11:56 AM
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http://www.diyautotune.com/catalog/i...nsor-p-40.html
My buddy has this one and its works great, you can save mulitple runs and plot them out on the computer and see how your a/f ratio was, plus you can see it on the fly.

http://www.aempower.com/ViewCategory.aspx?CategoryID=67
This looks cool i might look into this.

I think with 100shot 12.5 would be ok to....i wouldnt go higher then mid12's....12-12.5 for sure under 13 the whole time i would remain.
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Old Feb 23, 2007 | 08:18 PM
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whats the factory air/fuel ratio around on a ls1 motor?
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Old Feb 23, 2007 | 08:23 PM
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do you need a lab top to be able to tell what you're air fuel ratio is for the wideband?
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Old Feb 23, 2007 | 08:56 PM
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You can do either. In most cases you run a Wideband and it has a gauge associated with it. Providing the WB your using supports it, you can also feed the info into a laptop into its own software, or into a software program like EFI Live or HPT.

Generally the target AFR is 14.6 this is what the PCM try's to maintain using the factory narrow band O2 sensors (normal Driving), in stop and go driving you may see it go 16-17 when decelerating, and when Wide Open Throttle, mid 11's or so (Power Enrichment Mode).
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