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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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

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!

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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What about put a sniffer up the tailpipe instead? For testing anyhow..

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

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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67 S

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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Inconspicuously Conspicuous
Appreciation without Depreciation
forever chasing clearer skies...

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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Chris

Everything I like is either
illegal, immoral or fattening.

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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Inconspicuously Conspicuous
Appreciation without Depreciation
forever chasing clearer skies...

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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Chris

Everything I like is either
illegal, immoral or fattening.

rotator cuff tendon repair?
how serious is it, because that in itself is rather concerning

_________________
Inconspicuously Conspicuous
Appreciation without Depreciation
forever chasing clearer skies...

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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"Life is not like a box of chocolates... it's more like a jar of jalapenos. Whatever you do today, may burn your arse tomorrow."

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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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Nissans use a 3-wire sensor....
1 for EGO, the other two for the heater !

J

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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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A recent study found the average Aussie walks about 900 miles a year
Another study found Aussies drink, on average, 22 gallons of alcohol a year
That means, on average, Australians get about 41 miles per gallon

Kind of makes you proud to be an AUSSIE

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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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.