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Air/Fuel Readings?

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#1

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01-09-2007 | 09:15 AM

LightningToGo

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From: Tampa, Fl

Air/Fuel Readings?

What differences in A/F readings can you get between a wideband installed in your truck and a sniffer in the tail pipe that the tuners often use on the Dyno?

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#2

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01-09-2007 | 09:39 AM

pitstain

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From: HOMELESS

after a good hard pull on the dyno most of the o2 in the cats is burnt off and tailpipe readings will only show a point or two different...so I have been told by my tuner.

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#3

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01-09-2007 | 09:44 AM

LightningToGo

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From: Tampa, Fl

Quote:

Originally Posted by pitstain

after a good hard pull on the dyno most of the o2 in the cats is burnt off and tailpipe readings will only show a point or two different...so I have been told by my tuner.

So, you can have a reading from the sniffer @ 11.8 and your built-in wideband could read 10.8 more fuel?

Last edited by LightningToGo; 01-09-2007 at 09:56 AM.

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#4

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01-09-2007 | 10:42 AM

pitstain

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From: HOMELESS

No, after a pull or two the sniffer should be within 0.2 of the wideband.

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#5

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01-10-2007 | 12:10 PM

Robert Francis

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From: SE Michigan

As I recall there's some really good accurate tailpipe sniffers out there - such as the Horiba unit - but they're really expensive.

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#6

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01-11-2007 | 11:30 AM

afchad

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From: Tampa, FL

George...I have asked around and most tuners don't use the tail sniffer anymore.

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