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Old 01-26-2013, 06:39 AM   #1
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Looking for a good AFR gauge

So I'm shopping around for a nice air fuel ratio gauge for my 04 procharged GT. I really only have one major requirement and that is it must be accurate! I would prefer to have the afr and the fuel pressure displayed together on one gauge digitally.

Initially I was on americanmuscle.com looking at this http://www.americanmuscle.com/aerofo...ptor-9604.html but by the time you add the ability to read just the afr it is pushing $450 and that's a bit excessive corky taste
Does anyone know anything about the Innovate series DB afr gauge from jets ? Or have any other recommendations?

---------- Post added at 08:39 AM ---------- Previous post was at 08:35 AM ----------

Sorry "corky" should be *for my" and "jets" should be "jegs" my iPhone doesn't let me see what I'm typing past a certain number of characters on this app for some reason

And it can be found here http://www.jegs.com/i/Innovate-Motor...oductId=774546
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Old 01-26-2013, 07:16 AM   #2
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I looked and looked and looked.

Saw how most gauges are actually crap.

You don't want to skimp on AF.

I went with the best AM COBALTS.

Got mine for like 227 from Streetside I think.

EDIT: Day you go, cheapest gauge prices on the net. Also AutoZone has every gauge known to man on their website at good prices. Look up what you want on net then go to store and order, or order online. Streetside has the cheapest prices though and only carry the legit gauges.

*You should be able to always find at least one code discount for SS.

http://www.streetsideauto.com/c/gaug...-PHL-mode-all/
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Old 01-26-2013, 10:01 AM   #3
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+1 Autometer gauges are worth every penny!!
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Old 01-26-2013, 11:19 AM   #4
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Thanks guys you've been very helpful!
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Old 01-26-2013, 04:29 PM   #5
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Cool cool, make sure you get wide band digital, don't waste your money on the rest.

My Cobalt has settings for warning beeps and more, pretty tricked out in that respect.

264, couple discounts should get it to 240.
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Old 01-26-2013, 11:23 PM   #6
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The best accuracy you can get from a typical automotive grade wide band sensor is ±0.1 AFR, and that only in a range of 14:1 to 18:1 or so--this is a limitation of automotive WB O² sensors which were designed to run an engine, not to be laboratory grade instruments. Though that is pretty damned accurate, ±0.7%. The vertical channel of most digital oscilloscopes are not that accurate.

The specs for the Bosch LSU4 series sensors state accuracy as ±1.5 AFR (gasoline) at 25:1, and ±3.0 AFR at 11.75:1. The good news is that it is a lot more accurate on the lean side of 14.7:1. Remember these are the sensor's specs, any inaccuracy in the controller and display circuitry must be added in as well, meaning ± 0.2 AFR is about as good as it will be at the HID (Human Interface Device)...

Other maker's wide band sensors have similar specs.
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