Increasing Boost

[ademan]

When increasing boost by let's say 5%, is it a good rule of thumb to also richen AFR by the same percentage?

[turbofan]

the rule of thumb is to tune it with a proper wideband air/fuel ratio gauge. if you don't have one of those, you shouldn't be modifying the tune unless you're going more conservative.

[sfla_srt4]

There is no rule of thumb between boost and fuel.. Its get fuel to a SAFE AFR. If you dont have a wideband, dont play with the boost..