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Lyle if this a street car engine. The biggest bang for the buck might be using the narrow band sensor.
It has its limitations only accurately reading from 200mv-800mv and thats after heated up.
After building my engine I checked the A/F ratio on a GA. state emissions dyno. The CO was 3 % which is roughly 13.6. I also installed a O2 bung for more tuning capabilities later on down the road. Imagine my surprise when monitoring the O2 running down the road backing off cruise very slightly...
the sensor gave me the sweetest pattern it switched just like a compter controlled carb. This is with a very modified 32/3x carb.
So a narrow band sensor could give you an indication of where 14.7 is depending on load.
Also its a great indicator of fuel lean out.
Last edited by kwilford; 11-11-2008 at 12:31 AM.
Reason: brain fart
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