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Author Topic: Tuning Fuel- How much should I add/ subtract?  (Read 6660 times)

WAR cadet

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Tuning Fuel- How much should I add/ subtract?
« on: September 17, 2013, 02:09:42 PM »

I thought I would make a post to clarify a very common question.

How much do I need to add / subtract to make ____ change?

As a general rule of thumb, 10 points up or down is equal to 1 Air Fuel Ratio.

This is true if

-you are using the map with the intended setup
-you are using the intended injector size
-the O2 sensor is off while you are testing and tuning.

Things to remember while adjusting fuel

-If the O2 is on while you are doing this, you will have inconsistent results.
-Increased injector size may change how many points you must change to see a result.