air fuel ratios

[SoOkY]

is there any way or device that reads out air fuel ratios while driving??

[strutto]

wide band or narrow band??

[Sydneykid]

Hi Sooky, standard RB lambda sensors are slow and narrow, so unless the lambda sensor has been upgraded to a fast and wide one, it is a waste of time (and money) fitting a gauge of any sort.

Slow = very slow to react to changes in A/F ratio, only good for idling or cruising along at constant throttle.

Narrow = only work over a very narrow range (pretty lean) of A/F ratios. So it doesn't read power producing or overly rich or lean A/F ratios.

Standard N&S lambda sensors are cheap ($100) and designed for fuel economy and emissions via closed loop running. F&W lambda sensors are expensive ($600) and designed for tuning the engine.

Hope that adds to the thread.

[TomR33]

Have a look here: http://wbo2.com

The Bosch LSU sensor is not as expensive and used on some VW.

Tom

[Col-GTSX]

I bought a Apexi Turbo timer for odvious reasons and this also has a live A/F read out and i use this all the time..... I shows how badlly tuned my car is at the moment... LOL