Tuning fuel tables

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Warning

A lean air/fuel condition will damage the engine. Make sure that you monitor the air/fuel ratio at all times, and abort any dyno run if the air/fuel ratio becomes too lean.

 

Tuning Fuel at full load

It it necessary to use and lambda meter (air/fuel gauge) to tune to fuel tables. Most dynos are equipped with a lambda meter, otherwise there are a number of wide band lambda meters commercially available. It is best to tune so that the air/fuel plot are fairly flat.

 

Tuning Fuel at part throttle

To tune the fuel for part throttle the aim is to get the air/fuel ratio so that the engine will run correctly in closed loop. Normally the closed loop air/fuel ratio will center around the stoichiometric air/fuel ratio of 14.7:1, so it is best to tune the fuel tables up to column 7 to 14.7:1.