hi guys what should my mV reading be for nos any help would be great

 

Your 02 readings will be much higher running NOS as the mixture is much richer to prevent detonation. There is no desired mV that you are looking for...just make sure your fuel pressure, NOS and Fuel jets all match up to recommended levels. If you talk to your NOS manufacturer, they can recommend which jet sizes to use when you have greater than stock fuel pressures.

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