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View Full Version : why do wide bands display narrow also



Mr overkill
05-13-2007, 12:31 AM
ok so im looking at all type of gauges


why does a wide band also show a a/f (narrow band) isnt the narrow band unreliable under high hp ???? Or am i thinking its narrow on the display and its really a wide (good) reading


http://www.plxdevices.com/products/dm5/afrsmcombo/

Whorse
05-13-2007, 12:50 AM
I would say that looks like a wide reading. A narrowband won't show you 10:1 A/F on it like that one.

Mr overkill
05-13-2007, 12:57 AM
oh ok thats what i was thinking lolol thanks

Whorse
05-13-2007, 01:02 AM
well I assume that's what the numbers by the lighting is for.

BadAssPerformance
05-13-2007, 01:16 AM
Yep, it is a wideband.

GLHNSLHT2
05-13-2007, 11:03 AM
that "0.89" reading on the gauge in the pic isn't narrowband. It's Lambda values. Stoich is 1.0 in Lambda and you have voltages either richer or leaner from there obviously. It's what the Wideband O2 puts out normally. The wideband controller takes this info and converts it to an actual AFR.

Mr overkill
05-13-2007, 06:14 PM
ahhhhh ok

Speedeuphoria
05-14-2007, 02:55 PM
that "0.89" reading on the gauge in the pic isn't narrowband. It's Lambda values. Stoich is 1.0 in Lambda and you have voltages either richer or leaner from there obviously. It's what the Wideband O2 puts out normally. The wideband controller takes this info and converts it to an actual AFR.

yeah acording to fuel type
ex: gas 14.7=1.0=stoich

GLHNSLHT2
05-14-2007, 09:04 PM
true. I left it out cause it I didn't think it was too important for what we do.

TurboGLH
05-14-2007, 09:43 PM
true. I left it out cause it I didn't think it was too important for what we do.

True, it really only applies to people running a wideband set to display lambda 1.0 as 14.7 with a fuel other than Gasoline, or people running alcohol injection.

cordes
05-14-2007, 10:36 PM
True, it really only applies to people running a wideband set to display lambda 1.0 as 14.7 with a fuel other than Gasoline, or people running alcohol injection.

There is a little bit of variance for gas with ethanol in it though. I was surprised when I saw the lambda chart that broke everything down when I got my gauge. I know it is not a huge difference, but it was enough to make me think.

TurboGLH
05-15-2007, 11:30 AM
There is a little bit of variance for gas with ethanol in it though. I was surprised when I saw the lambda chart that broke everything down when I got my gauge. I know it is not a huge difference, but it was enough to make me think.

Is this chart paper or electronic? I'd be interested in seeing how mcuh the ethanol mix used at the pump changes the stoich point.

cordes
05-15-2007, 09:26 PM
Is this chart paper or electronic? I'd be interested in seeing how mcuh the ethanol mix used at the pump changes the stoich point.

It is paper. I thought about posting it, but I did not have the gumption yesterday. I might try to throw it up later. :)