Lambda Sensor
Turbo Mini Forums

I've been thinking about fitting a lambda sensor to my car, and monitoring the air/fuel ratio to warn me if the engine is running lean.

Can someone tell me what is a dangorous (too lean) air fuel mixture.

Also does anyone know of an existing circuit to do this?
If not I'm going to design and build one over the xmas holidays so I'll post it up if I think its anygood.

Do you think it could be a good diy tuning tool, if it can display the air/fuel ratio?

There was a design for a circuit kicking around on the minispares board. I have lamda read out on my ecu, very helpfull

Team Racing

Hi, Gibbo,
about the a/f r you would not like to experience with lean condition, 12.5 start to be rich;13.2 is good ,all over 15/1 is too lean .
about monitoring, it ,I have used a narrow band lambda sensor , but it is very inacurate, it's why i'm putting this link , gaved to me by turboharry : http://wbo2.com/
I just owned the wbo2 lambda bosch sensor, and vw parts are very good, they sended the sensor within a day, and i get it in 2 days
if you don't want to take this way , their is a lot of useful system on the web to read a narrowband sensor, search lambda reader on google.
fab

Hi there!

I have already assembled the WBO2 wideband lambda kit last week. The "How to do it" on the homepage is very good - the kit also has a data logger built in. I also have a good adress for a narrow band kit isf someone is interested. I orded ten of those, because many engine modifiers are already happy to know when their engines are running dangerous lean.

Harry

PS: Hi Fab, the T2 project turnes to reality!

Bimmer Twinky headed and turboed A-Series:
http://www.minifreunde.at/harry/projects.htm

I'll probably just fit a narrow band sensor because their cheap.
I only want to make sure that I'm not gonna melt my engine.
Perhaps when I have some spare cash I'll look at the wide band solutiuon.

By the way, is it ok to use fuel additives with these sensors?

Cheers

you can use anything other than lead as an addtive...

a std sensor is no good at all for setting up... and even if your using it as a warning light its still not much good as it will only tell u the mixture is lean once you get to 15:1.. its a switch more than a scale.

Wide band is the way to go!

alex

AlexF