In the original log fuel trims really don't look that bad to me? It's def. off some at higher MAP & RPM's but it's better than most people post.
I mean.. literally up until 2600 RPM's or so fuel trims are averaging almost zero. I wouldn't even mess with anything that isn't a problem
With VVE it will never be perfect. It's trying to best fit coefficients of crazy looking equations to fit the VE table you're asking for. It can't do that perfectly, so that's why it's changing areas you aren't wanting it to change. It's trying to best fit the new data as best it can but in order to do that is having to change other stuff. Fuel trims can do their job and keep fueling "right" regardless, in part throttle areas. Once in PE, that's where I'd spend some time on. For that you need a wideband.
I wouldn't even touch anything under 2800 RPM's and you don't have a lot of data in the higher RPM's areas that are showing a lot of negative fuel trim values anyways, so not sure I'd mess with anything there either without more data. At some point you're going to have to use a wideband, you can't use fuel trims once in PE.
VVE.JPG
If I set it to only show cells where you have 50 hits or more then you get this... almost nothing more than 3% off. You aren't going to do any better than that. The few that are higher/lower than that are probably data during decel and stuff like that that I really should be filtering out but I'm not
VVW 2.JPG