slant timing with turbo

I know N/A slant sixes don't appreciate any more than about 30 degrees total. I would only imagine forced induction would like either less total, or a curve that delays it more so than N/A. In the end, regardless of ignition, it's something you're just going to have to experiment with. Maybe a baseline of 25 total all in by 3000 is a good starting point. That's a kinda lazy curve for N/A, but for boost, maybe not....and I don't think it would be enough to hurt something.