Discussion and questions related to the course **EFI Tuning Fundamentals**

hi guys

watched the accel enrichment webinar but still not 100% sure on what the wall wetting and fuel film rolls play?

cheers

Is there a particular ECU you had in mind?

Wouldn't it be the same regardless of ecu type? I'm more so trying to understand why its used

Yes exactly. Some ecu's calculate how much fuel evaporates plus how much fuel is sticking to the walls. This is a more advanced way to do acceleration enrichment. If you know the quantity of fuel sticking per cycle and the evaporation rate you can calculate the additional fuel to add with each injection pulse.

That amount depends on the port geometry, the manifold vacuum, and the temperature. In real world it's mostly guess and check tuning.

awesome thanks