Normal Readings for Air / Fuel Ratio Gauge ?

[macspring]

I have fitted an Innovate digital Air / Fuel ratio gauge and it works beautifully, just not sure what it is showing me ?

It shows the ratio in numerics, so far I've say 10.0 up to 22.6 on overrun.

It also has an led light around the edge that runs from green to orange to red.


In order to ascertain if the engine / fuelling on a fry is correct, what should be my readings be;

On warm idle ?

On over run with the throttle body closed ?

Cruising on a light at say 50mph ?

Under load ?

Under wot ?

Thanks for any feedback / comments.

http://www.youtube.com/watch?v=p7WGM4Xdt_g&feature=endscreen

Same gauge as the lower gauge in this short video clip, not sure why he never goes even half wot ?

[djh]

Have a read of sonics thread, there was quite a bit of talk about air fuel gauge readings.

[GazzaG60]

there are some basic guidelines but each engine likes different things to be honest.

14.7:1 for cruise is what the narrowband aims for

10-12.5:1 for boost. id say somewhere near the middle for the audi turbos.

ive had cruise as high as mid-late 15's running ok but its really on the enige atr that point.

[FreddieDaniel]

I have fitted an Innovate digital Air / Fuel ratio gauge and it works beautifully, just not sure what it is showing me ?

It shows the ratio in numerics, so far I've say 10.0 up to 22.6 on overrun.

It also has an led light around the edge that runs from green to orange to red.


In order to ascertain if the engine / fuelling on a fry is correct, what should be my readings be;

On warm idle ?

On over run with the throttle body closed ?

Cruising on a light at say 50mph ?

Under load ?

Under wot ?

Thanks for any feedback / comments.






Same gauge as the lower gauge in this short video clip, not sure why he never goes even half wot ?

Were you able to find excat mean of these readings.. I am tried a lot but still unsuccessful..

[Pat D]

This may help, from the Autronic manual.


Tuning Guide
Settng up the A/F table
Here is the AF table with some colored fields to show how it works. Below is how the different zones work with the engines fuelling. In this example we use a modern turbo engine.