PeterLucas

As title really. Can anyone explain this.

I know lambda sensors sense unburnt oxygen in the exhaust and read between 0 and 1v. So how do they differ?

Cheers

PeterLucas

ECU Monitor Enthusiast

iTrader: (1)

A narrow band can ONLY measure very close to lambda 1.00.

Usually they give out a voltage that is about 0.45 volts at lambda 1.00
but switch either near to 0 (lean) or 0.8 volts (rich) or more when either
side even by a tiny amount of AFR.

I.E it can say rich or lean but not how much rich or lean it is.


A wide band can measure a wide range of AFR / Lambda.

The most common types output a DC current (around 0.5 to 10 milliamps)
Once this signal is processed, the output represents a linear
scale of true AFR/Lambda that can measure beyond the max/min
conditions for combustion.

Narrow band sensors are cheap but widebands are getting very cheap now !

Retro Al

iTrader: (1)

is it recomended to get these wide/narrow sensors fitted?

ECU Monitor Enthusiast

iTrader: (1)

Get a wideband if you can. Some as low as £200 - £300 now.

DONT get a narrow band display type, next to useless especially on a turbo car.

Rab

I have an AFM gauge but no lamda sensor fitted so it's not wired up.

So, where can I get a sensor? I have a rover lamda sensor in my lock up but that seems to have more wires coming out the back than the gauge has coming out of it

I need instructions

ECU Monitor Enthusiast

iTrader: (1)

Rab,

Contact the gauge manufacturer.


FYI.....


Narrow band sensors can have 1 to 4 wires.

Widebands can have 4 to 6 or more wires.


Not all wideband sensors are the same

GARETH T

narrow band and wideband sensor names discribe how much of the sale of air/fuel they can sense and be accurate

a narrow band sensor can has a sensor range of betweem 0.98 to 1.02 lambda



this graph shows voltage output plotted against air/fuel lambda

a wideband sensor is able to be accurate over a wider band of the air fuel range,,
0.7 to 1.4 lambda,,, as you can see this range is massive compaired too the narrow banded sensor

sadly a wideband sensors isnt so easy to obtain the air/fuel from,,, they do need give off a voltage in preportion to air fuel

a wideband sensor needs a control to be able to get information from it easyer,, and the operation of the wideband is a little too detailed to go into depth on this thread

any more questions?

GARETH T

bloody hell,,, i only went too the bog,, then started to reply

PeterLucas

i think most lanbda senosrs are heated mate cause they dont work when cold hense all the wires. . . . .might be wrong thouh?

So if I run an afr gauge I will need a wide band jobbie? Could I just nick one outta a scrappy whats cars have em?

Cheers for the advice!

ECU Monitor Enthusiast

iTrader: (1)

Gareth, Next time, dont take time to brush your hair in there too


Your input is valuable as that graph shows what I was trying to say very well

PeterLucas

WTF!

Basically im buying a downpipe with an oxygen sensor hole and would like to monitor my engine just to make sure she never leans out!

PeterLucas

surely then a narrow band would be good enough to say "oi ya leaning out Pal!"

ECU Monitor Enthusiast

iTrader: (1)

PeterLucas,

No, an engine, especially a turbo engine can lean out enough to melt
well before a narrow band says otherwise.

GARETH T

http://cgi.ebay.co.uk/Innovate-XD-16...QQcmdZViewItem

buy one of those,,,,, SORTED

GARETH T

dont know what you mean simon

ECU Monitor Enthusiast

iTrader: (1)

Looks a bit short there

GARETH T

when you seen it,, it was longer a wilder ,, its sort of like that at the mo i asked is she could cut it tonight, but shes buggered off up marks and spencers whoever they are sounds like a sordy threesum to me

PeterLucas

280quid! Nope cant do that and I know that would be the best option.


Im bidding on this, couldnt I just nick a wideband out of another car and use it in conjunction with this
http://cgi.ebay.co.uk/Autometer-52mm...QQcmdZViewItem

ECU Monitor Enthusiast

iTrader: (1)

NO NO NO NO NO NO NO NO NO NO NO NO NO NO NO


That is a NARROW band gauge

PeterLucas

So theres no point?, why bother having narrow gauges at all then?

Or are they just more suited to N/A cars

ECU Monitor Enthusiast

iTrader: (1)

PeterLucas,

They are ONLY good for one thing, IDLE and VERY LIGHT LOAD only
as your engine will run near LAMBDA in that range.

Also, Narrow band displays will NEVER be stable in the STOIC region
as the sensor is very sensitive there.

I.E. It will usually always show RICH or LEAN unless it is very
dampened in which case it will be quite slow to react.

You are better off without it in my profesional opinion.


Narrow band sensors are good for ecu control at idle but no good for
displaying AFR

PeterLucas

Ok fair enough thankyour for the advice

I will save me pennies for wide band monitoring then

Just out of interest then do modern petrol turbos control there fueling with wideband?

GARETH T

put it this way,,, this will be more useful in you car

http://cgi.ebay.co.uk/RETRO-CANDY-CU...QQcmdZViewItem

and its a buy it now price

GARETH T

yes

ECU Monitor Enthusiast

iTrader: (1)

As I said above, Narrow band sensors are very good when the ecu
is controlled by them as they allow idle an part load adjustments
and good economy.

They are just not suitable for providing information in real time
for viewing by the driver.

Most modern cars use widebands now due to EU emission regulations
and the fact they are getting cheaper now.

Retro Al

iTrader: (1)

is there a certain place on the downpipe for the wideband sensor?or can it go anyware?

chacha

You can install the oxygen sensor’s bung upstream from the catalytic converter(a bung and plug is included in the both LC-1 and LM-1 kits).
The wide-band oxygen sensor is then installed into the bung to take a reading. (Insert the plug into the bung when not in use).
The bung must be installed in the exhaust pipe at the side or on top, NOT on the bottom of the exhaust pipe. Best position is between 10:00 and 2:00 position.

Wideband sensor has to be connected to a controller, like LC-1 or LM-1 that we offer on ebay. Both these controllers are programable and can be used to log data to a laptop computer using supplied cable and software.
You can also display live Air/Fuel ratio on XD-16 gauge and even use simulated narrowband output from LC-1 to feed factory ECU.
Added benefit is that you can change simulated narrowband output and run ECU richer or leaner to get more performance.
The whole set-up does not have to be that expensive - complete LC-1 wideband kit is only £145.00 + delivery. We can also offer group buy discount - just send me a PM if interested.
Regards,
Vano
Salome Trading
http://stores.ebay.co.uk/empower-racing

lead_foot

iTrader: (1)

I got one of these:

http://cgi.ebay.co.uk/AEM-UEGO-GUAGE...QQcmdZViewItem

for £150 at the weekend, i haven't used it yet, are they any good?

lead_foot

iTrader: (1)

Any info?

chacha

I think it is a good product if you just want to monigot Air/Fuel ratio from a single sensor.
The advantage of Innovate Motorsports kit is that it allows you to connect different sensors and controllers together to have a complete tuning system so you can start with just one Wideband controller and gradually add gauge and other multi-sensor devices.

Cheers,
Vano
http://stores.ebay.co.uk/empower-racing