www.dawesdevices.com/airfuelmeter.html

WOT:

lean = 0.75-0.90 V
ideal = 0.90 to 0.95 V
rich = 0.95 to 1.0 V
very rich >1.0V

Do these apply to the Scooby?

If using an Dawes manual boost controller would one of these gismos be suitable - only monitoring at WOT as otherwise it just flashes about?

Since at WOT the Lambda sensor is not giving a voltage flying around all over the place would a DVM be suitable for initial testing aiming for over 0.90V or is it not going to be quick enough?

 

Hi John,
Have a look at the following links:-

http://www.davep1.freeserve.co.uk/rover/tech/lambda.htm

http://www.eskimo.com/~dalus/bmw/all/engine/all_o2sensor.html

Cheers,
Derek..

 

Thanks for the links. Most of the content I see about Lambda sensors discusses closed loop operation where the voltage rocks around the stoich point of say 0.6V.

What I need is to monitor the safety of fuelling at WOT I belive. At part throttle I am hoping the normal closed loop system will do. I am concerned to have adequate fueling at increased boost at high revs at WOT, especially since this is the zone where the boost with MBC will be rather higher than at present. So I really need a meter that will help me with this range? Are the above voltages right for a Scooby sensor at WOT? I know the ECU does not use the lambda info at WOT as it runs open loop, but presumably this is the zone most tuners are interested in?