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Recreational User
Join Date: Jan 2004
Location: Seattle, WA
Posts: 888
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Cockpit Air/Fuel Ratio Gauge???
I'm toying with the idea of adding a volt meter and air/fuel ratio gauge like this one to my car:
 My car doesn't currently have an oxygen sensor but it does have the provision for one that is currently plugged on the cat-bypass tube. Here's my question? Can you use a gauge like this if you don't have an oxygen sensor control computer? Can you direct wire it to an oxygen sensor? Last edited by DarrylD; 03-14-2005 at 09:18 AM.. |
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03-14-2005, 09:02 AM
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Moderator
Join Date: Dec 2001
Posts: 9,569
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Darryl,
Search here for "LM-1." All will be revealed.
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03-14-2005, 09:38 AM
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Administrator
Join Date: Feb 2000
Location: Los Angeles
Posts: 13,333
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If you do a search on wide band oxygen sensors, you'll find a lot of ideas, including some DIY-type solutions.
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Jack Olsen 1972 911 My new video about my garage. • A video from German TV about my 911 |
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03-14-2005, 09:52 AM
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Wer bremst verliert
Join Date: Jan 2005
Location: Toronto, Ontario
Posts: 4,767
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Yes, you can. I did it with an Autometer LED gauge and just welded in a bung for the O2 sensor in the collector.
Opt for a heated unit, which will give more accurate results quicker. You may want 2 sensors, one for each side.
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2007 911 Turbo - Not a toy 1985 911 Cab - Wife's toy 1982 911 3.2 Indiash Rot Track Supercharged track toy 1978 911 3.0 Lichtbau toy "Gretchen" 1971 911 Targa S backroad toy |
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03-14-2005, 09:55 AM
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Registered
Join Date: Dec 2003
Location: Upper Peninsula, Michigan
Posts: 812
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DarrylD,
That appears to be a Westach A/F ratio meter - I installed one in my car last year and found the resulting information to be very useful. It is not neccesary that you have a Lambda computer in order to install the gauge. Wiring the gauge up was easy (three wires). There seems to be quite a lot of interest, at least on this board, on using the wide-band meters versus the narrow-band meters; however, this particular meter worked very well for me.
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Daryl G. 1981 911 SC - sold 06/29/12 |
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03-14-2005, 10:03 AM
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MAGA
Join Date: May 2004
Posts: 10,775
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I am not real sure if this helps, but could you just use a simple EGT setup? If so, it would be simple to install and it would not require a computer or anything like that. This would not read in the same scale, but it definitely would show differences in mixture.
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German autos: '79 911 SC, '87 951, '03 330i, '08 Cayenne, '13 Cayenne 0% Liberal Men do not quit playing because they get old.... They get old because they quit playing. |
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03-14-2005, 10:05 AM
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Registered
Join Date: Jul 2000
Location: So. Calif.
Posts: 19,910
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The A/F ratio gauge shown is used with narrow band O2 sensors. You can connect the sensor directly to the gauge. As was suggested, use at least a 3-wire sensor - better response.
If you use two sensors (one sensor on each bank), you'll need a switch to choose/display what's happening on each bank. That said, narrow band sensors won't be as accurate outside the ideal 14.7:1 A/F ratio. There's a monetary step-up to a more accurate wide band sensor system. Sherwood Last edited by 911pcars; 03-15-2005 at 10:19 AM.. |
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03-14-2005, 10:39 AM
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Registered
Join Date: Nov 2004
Location: Greater Metropolitan Nimrod, Oregun
Posts: 10,040
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What would be a minimum cost to go with this?
Gauge + sensor?
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"A man with his priorities so far out of whack doesn't deserve such a fine automobile." - Ferris Bueller's Day Off |
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03-14-2005, 11:30 AM
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