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how can i know correct AFR on road tuning
Hello, have you done our courses?
Different engines may have slightly different requirements, but whatever they are, you will need to have some form of exhaust gas analyser to check it is in the approximate ratio that' s safe, not too rich or leaning out under load - the cheapest and most common is a wide band lambda, which monitors the amount of oxygen left in the exhaust gas.
With some vehicles, you can purchase equipment that uses the car's built in monitoring and lambda - if you can't do that, you can buy and fit aftermarket guages.
It' s generally a good idea to get used to using the lambda values, especially if using different fuels, as that will stay about the same whereas the actual and gauge AFRs may differ.
As Ross suggested, viewing the training videos should help you.
