Injection timing?

[Volvoist]

I have heard of folks running 1.00mm for injection timing. I am curious what you guys think in terms of a timing setting on a D24 NA... I am wondering if it really will make any difference. I measured my piston height on my engine rebuild today, and determined that it is a 2-notch gasket as per the green book, but that I can safely go to a 1-notch gasket, which is what I will be doing. I want to have an idea as to what to run my timing at for the best performance and economy (economy is more important). Its a BW55 slug, though should be much better with the fresh motor with .040" OS pistons...