The Dawes Devices Air/Fuel Ratio Meter

was a thing of beauty.  Designed to allow drag racers to keep their eyes on the road (err, track) , it’s super bright LEDs could be read in your peripheral vision.

Only one light came on at any time, so a precise determination of A/F ratio could be made (well, as precise as you can get with a narrow band O2 sensor!)

Red: Too lean, get out of the boost!

Yellow: The bare minimum fuel available for boost…

Green: Safe amount of Fuel for boost…..

Blue: Too rich!

But alas, the advance of technology brought us the wide band O2 sensor.  The introduction of the wide band O2 made it impractical to continue to produce the Dawes Devices A/F meter.  HOWEVER…….the march of technology brought the price of wide band technology way down.  You can now get a VERY nice Air/Fuel meter, complete with wide band sensor, for under $150 ($138, the last we checked–shipped free with Amazon Prime).  We now use nothing but the AEM 30-4110 on our own vehicles.  Nice and bright, reliable and accurate.  We highly recommend it:

Recommended replacement for the Dawes A/F gauges

AEM (30-4110) UEGO Air/Fuel Ratio Gauge

You can get it from Amazon and if you are also looking for our MKII Hybrid Boost Controller, you can get that there too.  Just search “Dawes Devices”