After the dyno day when nearly everybody had dodgy mixtures, I thought it would be a good idea to have one installed.
I think Jaycar have kits- anybody built one, do they work good?
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| Author: | drmini in aust [ Fri Mar 11, 2005 10:04 pm ] |
| Post subject: | fuel/air ratio meter etc |
After the dyno day when nearly everybody had dodgy mixtures, I thought it would be a good idea to have one installed. I think Jaycar have kits- anybody built one, do they work good?
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| Author: | Morris 1100 [ Fri Mar 11, 2005 10:12 pm ] |
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I bought a kit from Dick Smith, I am half way through building it (and have been for three years!) It looks good with a digital display and I am sure it will look much better when I finish it! |
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| Author: | kazjim [ Fri Mar 11, 2005 11:07 pm ] |
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Got one, still havnt put it together... Jaycar Led-Bar one..... need a sensor yet....... Oh, and to get a nut put into my dump pipe..... but yea, a good idea methinks! J |
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| Author: | drmini in aust [ Sat Mar 12, 2005 6:14 am ] |
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kazjim wrote: Got one, still havnt put it together...
Jaycar Led-Bar one..... need a sensor yet....... Oh, and to get a nut put into my dump pipe..... but yea, a good idea methinks! J What about put a sniffer up the tailpipe instead? For testing anyhow.. |
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| Author: | grub [ Sat Mar 12, 2005 10:54 am ] |
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All the kits from Jaycar or DSE seem to be for EFI cars. Do they work on non-efi cars? Could be just because non-efi cars do not have an EGO (its more attitude than ego  ).
Is it then just a case of getting a sniffer up the pipe as doc suggests? Could probably get a sensor from a wreck, build a pipe with the senor to shove up the pipe, and bob's your uncle. Found an interesting article while doing some investigating - http://www.siliconchip.com.au/cms/A_101150/article.html |
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| Author: | 68matic [ Sat Mar 12, 2005 12:14 pm ] |
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how does monitoring the tail pipe or exhaust gases (CO2, CO, C, O2, H2O) measure the fuel : air mixture (C8H18, O2) intuitively i wouldve though you needed to sense the mixture before it is burnt, somewhere between the carby needle and valves |
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| Author: | Chris [ Sat Mar 12, 2005 4:09 pm ] |
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I have got a portable gas analyser that runs off the battery and the samples at the tail pipe. All analysers used the tail pipe method before EFI and O2 sensors. I bought mine from Unipart many years ago. A pair of vacuum gauges is good idea also. Unless an O2 sensor is used the lag in readings is pretty bad. A few links.... http://www.pauter.com/super_pro.htm an interesting read. I might do something similar http://www.mainlineauto.com.au/products ... ..explains lambda values and stuff like that. I am bored after my operation so I did a bit of research. It's bloody awkward typing with one finger on one hand. The other one is in a sling for six weeks. |
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| Author: | 68matic [ Sat Mar 12, 2005 4:51 pm ] |
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68matic wrote: how does monitoring the tail pipe or exhaust gases (CO2, CO, C, O2, H2O)
measure the fuel : air mixture (C8H18, O2) answered my question: measured left over O2 in exhaust gases that was not burnt with fuel Chris why were you operated on hope it wasnt to do anything with doing up nuts |
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| Author: | Chris [ Sat Mar 12, 2005 7:16 pm ] |
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Very droll. I have had a rotater cuff injury in my shoulder repaired. 2 hours work and $5,500 for the medical profession. I'm in the wrong job. |
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| Author: | 68matic [ Sat Mar 12, 2005 8:20 pm ] |
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rotator cuff tendon repair? how serious is it, because that in itself is rather concerning |
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| Author: | Zizzle [ Sat Mar 12, 2005 9:30 pm ] |
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Last time I looked at doing this, the EGO sensor had to operate at 600 deg C. Which means pretty close to the engine. Have things changed? |
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| Author: | drmini in aust [ Sat Mar 12, 2005 10:04 pm ] |
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Zizzle wrote: Last time I looked at doing this, the EGO sensor had to operate at 600 deg C. Which means pretty close to the engine. Have things changed?
This may well be true, but I think many sensors have a heater built in? Otherwise how would the dyno ones work, shoved up the tailpipe.. |
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| Author: | kazjim [ Sat Mar 12, 2005 10:09 pm ] |
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Nissans use a 3-wire sensor.... 1 for EGO, the other two for the heater ! J |
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| Author: | EST-071 [ Mon Mar 14, 2005 7:26 pm ] |
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Had a talk to an auto elec today, he said to use the one from Jaycar you also need a air flow meter (the senser in the air box of later type cars). So it is just about impossible to get one of these to work correctly on a carbed mini. Cheers Pete |
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| Author: | drmini in aust [ Mon Mar 14, 2005 7:31 pm ] |
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Taken from Jaycar's site- STOCK-CODE: KA1758 RRP: $19.95 Qty 1+ $19.95 Qty 5+ $17.70 Exhaust Gas Oxygen Tester Kit An EGO sensor monitors your engines exhaust and tells the EFI computer if your engine is running lean, balanced or rich - basically telling the computer if your engine is running in tune. This simple circuit is connected to the EGO sensor, engine block and battery positive and will save you $$$ on tuning by indicating the air/fuel mixture. You can then adjust the EFI computer or tune your carburettor (an EGO can be adapted to carb engines). - Sensor required - available from most automotive stores. - PCB, silk-screened case, clips and components supplied. |
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